{"id":11640,"date":"2023-08-03T15:20:13","date_gmt":"2023-08-03T15:20:13","guid":{"rendered":"https:\/\/xometry.pro\/articles\/sheet-metal-finishes\/"},"modified":"2024-06-10T11:06:25","modified_gmt":"2024-06-10T09:06:25","slug":"sheet-metal-finishes","status":"publish","type":"articles","link":"https:\/\/xometry.pro\/en-tr\/articles\/sheet-metal-finishes\/","title":{"rendered":"Sheet Metal Finishes: Plating And Polishing Options"},"content":{"rendered":"<div role=\"navigation\" aria-label=\"Table of Contents\" class=\"simpletoc wp-block-simpletoc-toc\"><h2 class=\"simpletoc-title\">Table of Contents<\/h2>\n<ul class=\"simpletoc-list\">\n<li><a href=\"#h-the-two-finishing-method-principles\">The Two Finishing Method Principles<\/a>\n\n<\/li>\n<li><a href=\"#h-metal-plating-or-coating-for-sheet-metal\">Metal Plating or Coating for Sheet Metal<\/a>\n\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<\/li>\n\n<li><a href=\"#polishing-or-surface-finishing-for-sheet-metal\">Polishing or Surface Finishing for Sheet Metal<\/a>\n\n\n<\/li>\n\n<\/li>\n\n<li><a href=\"#sheet-metal-finishes-available-at-xometry\">Sheet Metal Finishes Available at Xometry<\/a>\n\n<\/li>\n<li><a href=\"#source-sheet-metal-parts-with-finishes-at-xometry\">Source Sheet Metal Parts With Finishes at Xometry<\/a>\n<\/li><\/ul><\/div>\n\n\n<p>A just machined sheet metal part has visible tool marks and potentially sharp edges and burrs. It not only affects the aesthetics of the part but also the tolerances. Post-processing operations also improve the strength and impart anti-corrosive properties to the metal. In order to have an improved part, it is always recommended to apply sheet metal finishes to the parts.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-the-two-finishing-method-principles\"><strong>The Two Finishing Method Principles<\/strong><\/h2>\n\n\n<p>The most common post-processing methods for&nbsp;sheet metal fabrication&nbsp;include plating and polishing. In the former, a layer is added to the surface and the latter involves the removal of material from the surface. Metal plating is also called coating while polishing is usually referred to as surface finishing.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-metal-plating-or-coating-for-sheet-metal\"><strong>Metal Plating or Coating for Sheet Metal<\/strong><\/h2>\n\n\n<p>The general principle of metal coating involves the addition of a layer on top of the surface. The following processes explain this topic in detail.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-galvanizing\"><strong>Galvanizing<\/strong><\/h3>\n\n\n<p><a href=\"#galvanising\">Galvanizing<\/a> is a process mainly associated with steel. Commonly known as hot-dip galvanising is a process of immersing steel in a bath of molten zinc, thereby coating the steel with multiple layers of zinc-iron alloy and zinc metal.<\/p>\n\n\n    <aside data-id=\"galvanising\" class=\"aside-popup\">\r\n        <div class=\"popup-content\">\r\n            <div class=\"popup-close-btn\">\r\n                <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/themes\/xometry\/assets\/images\/cross.svg\" alt=\"close-popup\">\r\n            <\/div>\r\n            <div>\r\n                <div class=\"popup-title\">Alternative designation<\/div><div class=\"popup-text\">Galvanising can also be called zing coating.<\/div>            <\/div>\r\n                    <\/div>\r\n    <\/aside>\r\n\n\n\n<p>It is because the zinc metallurgically reacts with iron in the steel and diffuses the coating perpendicular to the surface creating a uniform thick layer along the surface.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Sheet-metal-galvanized-painted-finsh-1024x683.jpeg\" alt=\"Sheet metal galvanized painted finsh\" class=\"wp-image-1569\" style=\"aspect-ratio:1.501628664495114;max-width:839px;height:auto\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Sheet-metal-galvanized-painted-finsh-1024x683.jpeg 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Sheet-metal-galvanized-painted-finsh-300x200.jpeg 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Sheet-metal-galvanized-painted-finsh-768x512.jpeg 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Sheet-metal-galvanized-painted-finsh.jpeg 1440w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Sheet-metal-galvanized-painted-finsh.jpeg\" data-fancybox=\"gallery-11640\" data-caption=\"Sheet metal galvanized painted finish\" aria-label=\"Open full image\"><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Sheet-metal-galvanized-painted-finsh.jpeg\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Sheet metal galvanized painted finish<\/figcaption><\/figure>\n\n\n<h3 class=\"wp-block-heading\" id=\"passivation\"><strong>Passivation<\/strong><\/h3>\n\n\n<p>Passivation is a post-processing process primarily involving stainless steel. Stainless steel mainly comprises iron, chromium and nickel. The anti-corrosion properties of stainless steel are provided by chromium in the alloy as it naturally produces a layer of chromium oxide on the surface while the free iron facilitates corrosion.<\/p>\n\n\n\n<p>Passivation involves immersion of stainless steel in an acid bath (e.g. Nitric acid) which dissolves free iron and improves the strength of chromium oxide, thereby countering corrosion.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-anodizing\"><strong>Anodizing<\/strong><\/h3>\n\n\n<p>Anodizing is similar to passivation as it improves the thickness of the oxide layer thereby making the metal surface corrosion resistant. It is highly common for aluminium. It differs from passivation where instead of just dipping in acid, an electrolytic process is involved. Hence it is also called electrolytic passivation.<\/p>\n\n\n<div id=\"LBLV1CPBRRk-69d57d6dab522\" data-video-id=\"LBLV1CPBRRk\" class=\"ma-gdpr-youtube-wrapper\" style=\"width:100%;height:56.25%;padding-top:56.25%;\" data-new-window=\"\" data-yt-parameters=\"WyJtYXgtd2lkdGg9XHUyMDFjNzAwcHhcIiJd\"><picture class=\"ma-gdpr-youtube-thumbnail\"><source media=\"(min-width:640px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/LBLV1CPBRRk\/LBLV1CPBRRk_hq720.webp\"><source media=\"(min-width:640px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/LBLV1CPBRRk\/LBLV1CPBRRk_hq720.jpg\"><source media=\"(min-width:320px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/LBLV1CPBRRk\/LBLV1CPBRRk_sddefault.webp\"><source media=\"(min-width:320px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/LBLV1CPBRRk\/LBLV1CPBRRk_sddefault.jpg\"><source media=\"(min-width:240px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/LBLV1CPBRRk\/LBLV1CPBRRk_hqdefault.webp\"><source media=\"(min-width:240px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/LBLV1CPBRRk\/LBLV1CPBRRk_hqdefault.jpg\"><img decoding=\"async\" src=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/LBLV1CPBRRk\/LBLV1CPBRRk_mqdefault.jpg\" alt=\"\" title=\"\"><\/picture><svg class=\"ma-gdpr-youtube-button\"><use xlink:href=\"#ma-gdpr-youtube-play-button\"><\/use><\/svg><div class=\"ma-gdpr-youtube-notice\" style=\"font-size:.7em;\"><\/div><\/div>\n\n\n\n<p>In anodizing, aluminium alloy is dipped in a sulphuric acid electrolyte and used as an anode. When a cathode (inert material like stainless steel, nickel, carbon etc.) is placed and electricity is passed, oxygen flows to the anode and reacts forming an anodic oxide. This anodic oxide mostly contains aluminium oxide which protects against corrosion.<\/p>\n\n\n\n<p>The electrolytes are usually:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>10\u201315% solution sulphuric acid at 25\u2103 which produces an oxide layer of about 25\u00b5m\/hr<\/li>\n\n\n\n<li>Mixture of oxalic and sulphuric acids at 30\u2103, producing about 30\u00b5m\/hr<\/li>\n\n\n\n<li>10% chromic acid operating at 38\u201342\u00b0C, producing about 15\u00b5m\/hr<\/li>\n<\/ul>\n\n\n\n<p>Anodizing also imparts a coarse and grainy surface finish to the metal. It also facilitates the trapping of dye in the oxide layer, thereby giving a near-permanent colour.<\/p>\n\n\n    <section class=\"article-slider-block\">\r\n        <div class=\"article-content-wrapper\">\r\n            <!-- Swiper -->\r\n            <div class=\"swiper mySwiper2 article-slider-display\">\r\n                <div class=\"swiper-wrapper\">\r\n                                                <div class=\"swiper-slide\">\r\n                                <div class=\"wp-block-image__wrap\">\r\n                                    <img decoding=\"async\"  src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Sheet-Metal-Aluminium-Anodizing-All-colours-scaled.jpg\" alt=\"\"\r\n                                    >\r\n                                    <a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Sheet-Metal-Aluminium-Anodizing-All-colours-scaled.jpg\" data-fancybox=\"gallery\" data-caption=\"Sheet Metal 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src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/09\/Sheet-Metal-Aluminium-Anodizing-Yellow-scaled.jpg\" alt=\"Sheet Metal Aluminium Anodizing Yellow\"\r\n                                    >\r\n                                    <a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/09\/Sheet-Metal-Aluminium-Anodizing-Yellow-scaled.jpg\" data-fancybox=\"gallery\" data-caption=\"Sheet Metal Aluminium Anodizing Yellow\" aria-label=\"Open full image\">\r\n                                        <img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/09\/Sheet-Metal-Aluminium-Anodizing-Yellow-scaled.jpg\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"Sheet Metal Aluminium Anodizing Yellow\" loading=\"lazy\" decoding=\"async\">\r\n                                        <svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n                                            <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"><\/path>\r\n                                        <\/svg>\r\n                                    <\/a>\r\n                                <\/div>\r\n                                <div class=\"article-slider-text\">\r\n                                    <p>Sheet Metal Aluminium Anodizing Yellow<\/p>\n                                <\/div>\r\n                            <\/div>\r\n                            \r\n                                            <\/div>\r\n            <\/div>\r\n            <div thumbsSlider=\"\" class=\"swiper mySwiper article-slider-list\">\r\n                <div class=\"swiper-wrapper\">\r\n                                            <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Sheet-Metal-Aluminium-Anodizing-All-colours-scaled.jpg\" alt=\"\">\r\n                        <\/div>\r\n                                                <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Sheet-Metal-Aluminium-Anodizing-Black-scaled.jpg\" alt=\"\">\r\n                        <\/div>\r\n                                                <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Sheet-Metal-Aluminium-Anodizing-Blue-scaled.jpg\" alt=\"\">\r\n                        <\/div>\r\n                                                <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" 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src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/09\/Sheet-Metal-Aluminium-Anodizing-Red-scaled.jpg\" alt=\"Sheet Metal Aluminium Anodizing Red\">\r\n                        <\/div>\r\n                                                <div class=\"swiper-slide\">\r\n                            <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/09\/Sheet-Metal-Aluminium-Anodizing-Yellow-scaled.jpg\" alt=\"Sheet Metal Aluminium Anodizing Yellow\">\r\n                        <\/div>\r\n                                        <\/div>\r\n            <\/div>\r\n        <\/div>\r\n    <\/section>\r\n    \n\n<h3 class=\"wp-block-heading\" id=\"h-hard-anodising\"><strong>Hard Anodising<\/strong><\/h3>\n\n\n<p>In hard anodising, thicker oxide coatings are formed (25-100\u00b5m). This is achieved as a result of performing electrolysis by using oxalic and sulphuric acid mixture at high concentrations and at the temperature of 0-10\u00b0C. The coatings are often grey to black in color. The hardness is typically 500-900HV.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"chemfilm\"><strong>Chem-film<\/strong><\/h3>\n\n\n<p><a href=\"#chem-film\">Chem-Film<\/a> is also a process of aluminium passivation. Chem-film is applied by dipping, spraying or brushing the aluminium. It doesn\u2019t affect the dimensions and can serve as a base for further organic coatings.<\/p>\n\n\n    <aside data-id=\"chem-film\" class=\"aside-popup\">\r\n        <div class=\"popup-content\">\r\n            <div class=\"popup-close-btn\">\r\n                <img decoding=\"async\" src=\"https:\/\/xometry.pro\/wp-content\/themes\/xometry\/assets\/images\/cross.svg\" alt=\"close-popup\">\r\n            <\/div>\r\n            <div>\r\n                <div class=\"popup-text\">Chem-film is also known as chromate conversion coating.<\/div>            <\/div>\r\n                    <\/div>\r\n    <\/aside>\r\n\n\n\n<p>It can be applied to repair anodised surfaces. The resultant coating varies from colourless to yellow to tan in the spectrum. Hence, varying shades of yellow can be found on the chem-filmed metals.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"electroplating\"><strong>Electroplating<\/strong><\/h3>\n\n\n<p>Electroplating is a technique of plating one metal onto another by hydrolysis. Here, the cathode is the metal to be plated and the anode is sacrificial. For example, a sacrificial silver anode can plate the surface of a steel or aluminium cathode in hydrolysis. This process can impart strength and anti-corrosive properties to the metals.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><div class=\"wp-block-image__wrap\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Electroplating-bath-with-metal-deposit-1024x683.jpeg\" alt=\"Electroplating bath with metal deposit\" class=\"wp-image-1566\" style=\"aspect-ratio:1.497282608695652;max-width:840px;height:auto\" srcset=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Electroplating-bath-with-metal-deposit-1024x683.jpeg 1024w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Electroplating-bath-with-metal-deposit-300x200.jpeg 300w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Electroplating-bath-with-metal-deposit-768x512.jpeg 768w, https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Electroplating-bath-with-metal-deposit.jpeg 1440w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><a class=\"wp-block-image__fancy-box-button\" href=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Electroplating-bath-with-metal-deposit.jpeg\" data-fancybox=\"gallery-11640\" data-caption=\"Electroplating bath with metal deposit\" aria-label=\"Open full image\"0><img src=\"https:\/\/xometry.pro\/wp-content\/uploads\/2023\/08\/Electroplating-bath-with-metal-deposit.jpeg\" class=\"wp-block-image__fancy-box-button-thumbnail wp-post-image\" alt=\"\" loading=\"lazy\" decoding=\"async\"><svg class=\"wp-block-image__fancy-box-button-icon\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\" fill=\"none\" aria-hidden=\"true\">\r\n               <path d=\"M0 2V6H2V2H6V0H2C0.895 0 0 0.895 0 2ZM2 12H0V16C0 17.105 0.895 18 2 18H6V16H2V12ZM16 16H12V18H16C17.105 18 18 17.105 18 16V12H16V16ZM16 0H12V2H16V6H18V2C18 0.895 17.105 0 16 0Z\" fill=\"#092C47\"\/>\r\n             <\/svg><\/a><\/div><figcaption class=\"wp-element-caption\">Electroplating bath with metal deposit<\/figcaption><\/figure>\n\n\n<h3 class=\"wp-block-heading\" id=\"black-oxide\"><strong>Black Oxide<\/strong><\/h3>\n\n\n<p>Black oxide process is referred to as chemical conversion coating. Unlike electroplating, the black oxide coating is produced by the chemical reaction between the iron content in the materials like aluminium or steel and the oxidising salt present in the black oxide solution.&nbsp;<\/p>\n\n\n\n<p>The solutions are widely available and have catalysts, penetrators, activators and additives which take part in the reaction resulting in a black iron oxide layer, and magnetite (Fe3o4) formation on the substrate surface. The inception of wax or oil can also increase the anti-corrosion and friction reduction in the parts.<\/p>\n\n\n\n<p>Black colour helps in the reflection of light thereby UV and infrared resistance.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"electroless-nickel-plating\"><strong>Electroless Nickel Plating<\/strong><\/h3>\n\n\n<p>Electroless nickel or nickel phosphorus plating involves the deposition of an even layer of nickel-phosphorus alloy on the top surface of the solid substrate, like aluminium or steel. The substrate is dipped into a water solution containing nickel salts and phosphorus-reducing agents.<\/p>\n\n\n\n<p>Unlike electroplating, this procedure plates the substrate uniformly while the former suffers from uneven current density and resistance of the substrate.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"powder-coating\"><strong>Powder Coating<\/strong><\/h3>\n\n\n<p>Powder coating involves free-flowing dry powder which is coated on a substrate. Unlike the normal liquid paint which utilises evaporating solvent, powder coating is applied electrostatically and cured under heat or UV light. The powder can be of thermoplastic or a thermoset polymer.&nbsp;<\/p>\n\n\n\n<p>The finish is usually tougher and even compared to conventional coats. Metals like aluminium and steel can be efficiently coated with polymer powders.<\/p>\n\n\n<div id=\"6TNVFN9slfo-69d57d6dace7b\" data-video-id=\"6TNVFN9slfo\" class=\"ma-gdpr-youtube-wrapper\" style=\"width:100%;height:56.25%;padding-top:56.25%;\" data-new-window=\"\" data-yt-parameters=\"WyJtYXgtd2lkdGg9XHUyMDFjNzAwcHhcIiJd\"><picture class=\"ma-gdpr-youtube-thumbnail\"><source media=\"(min-width:640px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/6TNVFN9slfo\/6TNVFN9slfo_hq720.webp\"><source media=\"(min-width:640px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/6TNVFN9slfo\/6TNVFN9slfo_hq720.jpg\"><source media=\"(min-width:320px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/6TNVFN9slfo\/6TNVFN9slfo_sddefault.webp\"><source media=\"(min-width:320px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/6TNVFN9slfo\/6TNVFN9slfo_sddefault.jpg\"><source media=\"(min-width:240px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/6TNVFN9slfo\/6TNVFN9slfo_hqdefault.webp\"><source media=\"(min-width:240px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/6TNVFN9slfo\/6TNVFN9slfo_hqdefault.jpg\"><img decoding=\"async\" src=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/6TNVFN9slfo\/6TNVFN9slfo_mqdefault.jpg\" alt=\"\" title=\"\"><\/picture><svg class=\"ma-gdpr-youtube-button\"><use xlink:href=\"#ma-gdpr-youtube-play-button\"><\/use><\/svg><div class=\"ma-gdpr-youtube-notice\" style=\"font-size:.7em;\"><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"polishing-or-surface-finishing-for-sheet-metal\"><strong>Polishing or Surface Finishing for Sheet Metal<\/strong><\/h2>\n\n<h3 class=\"wp-block-heading\" id=\"bead-blasting\"><strong>Bead Blasting<\/strong><\/h3>\n\n\n<p>The bead blasting technique involves spraying a pressurised stream of tiny beads of media (plastic or glass) from a nozzle onto the surface of the part. This removes the burrs and imperfections, leaving a smooth finish. In addition, the end product resembles a uniform matte finish.&nbsp;<\/p>\n\n\n\n<p>Bead blasting is done in a closed chamber. Glass bead blasting is more common for sheet metal parts. Since the surface is matte, it is ideal for painting and dying. Bead blasting before anodising is ideal surface preparation, creating a non-reflective surface. The recommended part size is 6-600 mm in both height and width. Smaller parts are hard to hold and tough to produce an even surface.<\/p>\n\n\n<div id=\"7C1cX3bUOa0-69d57d6dae398\" data-video-id=\"7C1cX3bUOa0\" class=\"ma-gdpr-youtube-wrapper\" style=\"width:100%;height:56.25%;padding-top:56.25%;\" data-new-window=\"\" data-yt-parameters=\"WyJtYXgtd2lkdGg9XHUyMDFjNzAwcHhcIiJd\"><picture class=\"ma-gdpr-youtube-thumbnail\"><source media=\"(min-width:640px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/7C1cX3bUOa0\/7C1cX3bUOa0_hq720.webp\"><source media=\"(min-width:640px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/7C1cX3bUOa0\/7C1cX3bUOa0_hq720.jpg\"><source media=\"(min-width:320px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/7C1cX3bUOa0\/7C1cX3bUOa0_sddefault.webp\"><source media=\"(min-width:320px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/7C1cX3bUOa0\/7C1cX3bUOa0_sddefault.jpg\"><source media=\"(min-width:240px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/7C1cX3bUOa0\/7C1cX3bUOa0_hqdefault.webp\"><source media=\"(min-width:240px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/7C1cX3bUOa0\/7C1cX3bUOa0_hqdefault.jpg\"><img decoding=\"async\" src=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/7C1cX3bUOa0\/7C1cX3bUOa0_mqdefault.jpg\" alt=\"\" title=\"\"><\/picture><svg class=\"ma-gdpr-youtube-button\"><use xlink:href=\"#ma-gdpr-youtube-play-button\"><\/use><\/svg><div class=\"ma-gdpr-youtube-notice\" style=\"font-size:.7em;\"><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"tumbling\"><strong>Tumbling<\/strong><\/h3>\n\n\n<p>Tumbling is an inexpensive alternative to bead blasting where, instead of glass beads, abrasive ceramic media is present in a vibratory tumbler. The combination of water, media and vibratory motion helps in the reduction of burrs and imparts an even surface. It is suitable for surface preparation for any following operations like anodising and dying.&nbsp;<\/p>\n\n\n\n<p>The metals undergoing tumbling must be thicker in order to withstand the vibrations and deformation. For stainless steel, the part should be at least 0.8 mm, for aluminium and non-ferrous, above 1 mm thickness is recommended.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-electropolish-ing\"><strong>Electropolish<\/strong>ing<\/h3>\n\n\n<p>Electropolishing is the opposite of electroplating. In the latter, the substrate is a cathode and the sacrificial anode imparts its ions to the cathode. Here, it is reversed where the substrate is an anode and its ions travel towards the cathode.&nbsp;<\/p>\n\n\n\n<p>In this process, the micro peaks and valleys are levelled out. It is a very good technique for deburring and reducing surface roughness.<\/p>\n\n\n<div id=\"n7zLIZI6hF8-69d57d6dafcec\" data-video-id=\"n7zLIZI6hF8\" class=\"ma-gdpr-youtube-wrapper\" style=\"width:100%;height:56.25%;padding-top:56.25%;\" data-new-window=\"\" data-yt-parameters=\"WyJtYXgtd2lkdGg9XHUyMDFjNzAwcHhcIiJd\"><picture class=\"ma-gdpr-youtube-thumbnail\"><source media=\"(min-width:640px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/n7zLIZI6hF8\/n7zLIZI6hF8_hq720.webp\"><source media=\"(min-width:640px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/n7zLIZI6hF8\/n7zLIZI6hF8_hq720.jpg\"><source media=\"(min-width:320px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/n7zLIZI6hF8\/n7zLIZI6hF8_sddefault.webp\"><source media=\"(min-width:320px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/n7zLIZI6hF8\/n7zLIZI6hF8_sddefault.jpg\"><source media=\"(min-width:240px)\" type=\"image\/webp\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/n7zLIZI6hF8\/n7zLIZI6hF8_hqdefault.webp\"><source media=\"(min-width:240px)\" type=\"image\/jpeg\" srcset=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/n7zLIZI6hF8\/n7zLIZI6hF8_hqdefault.jpg\"><img decoding=\"async\" src=\"\/\/xometry.pro\/wp-content\/uploads\/ma-gdpr-youtube-thumbnails\/n7zLIZI6hF8\/n7zLIZI6hF8_mqdefault.jpg\" alt=\"\" title=\"\"><\/picture><svg class=\"ma-gdpr-youtube-button\"><use xlink:href=\"#ma-gdpr-youtube-play-button\"><\/use><\/svg><div class=\"ma-gdpr-youtube-notice\" style=\"font-size:.7em;\"><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"sheet-metal-finishes-available-at-xometry\"><strong>Sheet Metal Finishes Available at Xometry<\/strong><\/h2>\n\n\n<p>Standard (as-cut) is the finish option with the fastest turnaround. Parts are left with visible tool marks and potentially sharp edges and burrs. They might have marks from the waterjet cutting, discolouration due to laser cutting or even tool marks from milling. These can be removed on request.&nbsp;<\/p>\n\n\n\n<p>Sheet metal parts can have their aesthetics improved and mechanical and thermal properties increased with the help of various post-processing options. The table below sums up and compares the sheet metal finish available at Xometry.<\/p>\n\n\n<div class=\"custom-table-block \" id=\"table-id-970\" >\r\n\t<div class=\"search-input-wrapper\">\r\n\t\t<svg width=\"16\" height=\"16\" viewBox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n\t\t\t<path d=\"M15.7812 13.833L12.6659 10.7177C12.5252 10.5771 12.3346 10.499 12.1347 10.499H11.6253C12.4877 9.39596 13.0002 8.00859 13.0002 6.49937C13.0002 2.90909 10.0911 0 6.50083 0C2.91056 0 0.00146484 2.90909 0.00146484 6.49937C0.00146484 10.0896 2.91056 12.9987 6.50083 12.9987C8.01006 12.9987 9.39742 12.4863 10.5004 11.6239V12.1332C10.5004 12.3332 10.5786 12.5238 10.7192 12.6644L13.8345 15.7797C14.1282 16.0734 14.6032 16.0734 14.8938 15.7797L15.778 14.8954C16.0718 14.6017 16.0718 14.1267 15.7812 13.833ZM6.50083 10.499C4.29167 10.499 2.50122 8.71165 2.50122 6.49937C2.50122 4.29021 4.28855 2.49976 6.50083 2.49976C8.70999 2.49976 10.5004 4.28708 10.5004 6.49937C10.5004 8.70852 8.71311 10.499 6.50083 10.499Z\" fill=\"#476175\"\/>\r\n\t\t<\/svg>\r\n\t\t<input type=\"search\" class=\"table-search-input\" id=\"table-search-970\" placeholder=\"Table search\">\r\n\t<\/div>\t\r\n\t<div class=\"table-wrapper\">\r\n\t\t<table style=\"border-collapse: collapse; width: 100%; height: 696px;\">\n<tbody>\n<tr style=\"height: 48px;\">\n<td style=\"width: 46.5296%; height: 48px;\"><strong>Finishing option<\/strong><\/td>\n<td style=\"width: 19.6658%; height: 48px;\"><strong>Suitable material(s)<\/strong><\/td>\n<td style=\"width: 33.6761%; height: 48px;\"><strong>Benefits<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 46.5296%; height: 24px;\"><strong>Galvanizing<\/strong><\/td>\n<td style=\"width: 19.6658%; height: 24px;\">Stainless steel, steel<\/td>\n<td style=\"width: 33.6761%; height: 24px;\">\u2022 Increases resistance to corrosion<\/td>\n<\/tr>\n<tr style=\"height: 48px;\">\n<td style=\"width: 46.5296%; height: 48px;\"><strong>Passivation<\/strong><\/td>\n<td style=\"width: 19.6658%; height: 48px;\">Stainless steel<\/td>\n<td style=\"width: 33.6761%; height: 48px;\">\u2022 Increases the part\u2019s resistance to corrosion<\/td>\n<\/tr>\n<tr style=\"height: 72px;\">\n<td style=\"width: 46.5296%; height: 72px;\"><strong>Anodizing<\/strong><br \/>\n(orange, red, purple, gold, yellow, black, green, blue and clear anodizing)<\/td>\n<td style=\"width: 19.6658%; height: 72px;\">Aluminium<\/td>\n<td style=\"width: 33.6761%; height: 72px;\">\u2022 Gives a shiny aesthetic finish<br \/>\n\u2022 Increases the part\u2019s resistance to corrosion<\/td>\n<\/tr>\n<tr style=\"height: 72px;\">\n<td style=\"width: 46.5296%; height: 72px;\"><strong>Hard anodizing<br \/>\n<\/strong>(grey, clear, black, PTFE impregnated hard anodize*)<\/td>\n<td style=\"width: 19.6658%; height: 72px;\">Aluminium<\/td>\n<td style=\"width: 33.6761%; height: 72px;\">\u2022 Increases surface hardness<br \/>\n\u2022 High degree of water and corrosion resistance<\/td>\n<\/tr>\n<tr style=\"height: 72px;\">\n<td style=\"width: 46.5296%; height: 72px;\"><strong>Chem-film<br \/>\n<\/strong>(gold, clear)<\/td>\n<td style=\"width: 19.6658%; height: 72px;\">Aluminium<\/td>\n<td style=\"width: 33.6761%; height: 72px;\">\u2022 Improves corrosion resistance<br \/>\n\u2022 Does not affect electrical conductivity<\/td>\n<\/tr>\n<tr style=\"height: 48px;\">\n<td style=\"width: 46.5296%; height: 48px;\"><strong>Electroplating<\/strong><br \/>\n(gold, silver and zinc plating)<\/td>\n<td style=\"width: 19.6658%; height: 48px;\">Aluminium, steel alloys<\/td>\n<td style=\"width: 33.6761%; height: 48px;\">\u2022 Increases resistance to corrosion<br \/>\n\u2022 Increases strength and aesthetics<\/td>\n<\/tr>\n<tr style=\"height: 48px;\">\n<td style=\"width: 46.5296%; height: 48px;\"><strong>Black oxide<\/strong><\/td>\n<td style=\"width: 19.6658%; height: 48px;\">Aluminium, steel<\/td>\n<td style=\"width: 33.6761%; height: 48px;\">\u2022 Increases resistance to corrosion<br \/>\n\u2022 Increases UV resistance<\/td>\n<\/tr>\n<tr style=\"height: 48px;\">\n<td style=\"width: 46.5296%; height: 48px;\"><strong>Electroless nickel plating<\/strong><\/td>\n<td style=\"width: 19.6658%; height: 48px;\">Aluminium, steel<\/td>\n<td style=\"width: 33.6761%; height: 48px;\">\u2022 Improves the surface<br \/>\n\u2022 Cost effective<\/td>\n<\/tr>\n<tr style=\"height: 48px;\">\n<td style=\"width: 46.5296%; height: 48px;\"><strong>Powder coating<\/strong><\/td>\n<td style=\"width: 19.6658%; height: 48px;\">Aluminium, steel<\/td>\n<td style=\"width: 33.6761%; height: 48px;\">\u2022 Increases strength<br \/>\n\u2022 Good base for dyeing<\/td>\n<\/tr>\n<tr style=\"height: 48px;\">\n<td style=\"width: 46.5296%; height: 48px;\"><strong>Tumbling<\/strong><\/td>\n<td style=\"width: 19.6658%; height: 48px;\">Aluminium, stainless steel<\/td>\n<td style=\"width: 33.6761%; height: 48px;\">\u2022 Cost-effective<br \/>\n\u2022 Even and shiny surface<\/td>\n<\/tr>\n<tr style=\"height: 72px;\">\n<td style=\"width: 46.5296%; height: 72px;\"><strong>Electropolish<\/strong><\/td>\n<td style=\"width: 19.6658%; height: 72px;\">Aluminium, stainless steel<\/td>\n<td style=\"width: 33.6761%; height: 72px;\">\u2022 Even and shiny surface<br \/>\n\u2022 Corrosion resistant and high weldability<\/td>\n<\/tr>\n<tr style=\"height: 48px;\">\n<td style=\"width: 46.5296%; height: 48px;\"><strong>Bead blasting<\/strong><\/td>\n<td style=\"width: 19.6658%; height: 48px;\">Aluminium, stainless steel<\/td>\n<td style=\"width: 33.6761%; height: 48px;\">\u2022 Highly effective for even and smooth surface finish<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t<\/div>\r\n<\/div>\r\n<style>\r\n\t.custom-table-block table{\r\n\t\theight: initial!important;\r\n\t}\r\n\t.search-input-wrapper{\r\n\t\tposition: relative;\r\n\t\tmargin-bottom: 24px;\r\n\t}\r\n\t.search-input-wrapper svg{\r\n\t\tposition: absolute;\r\n\t\ttop:50%;\r\n\t\tleft:12px;\r\n\t\ttransform: translateY(-50%);\r\n\t}\r\n\t.table-search-input{\r\n\t\tpadding: 0 0 0 40px;\r\n\t\tborder:1px solid #C1CAD1;\r\n\t\theight: 44px;\r\n\t\twidth: 201px;\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t}\r\n\t.table-search-input::placeholder{\r\n\t\tcolor:#092C47;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\ttext-align: left;\r\n\t\twhite-space:nowrap;\r\n\t}\r\n\t\r\n\t.custom-table-block thead{\r\n\t\tmargin-bottom: 14px;\r\n\t}\r\n\r\n\t.custom-table-block tbody tr:nth-child(odd){\r\n\t\tbackground-color: #F6F9FF;\r\n\t}\r\n\r\n\t.custom-table-block tbody, .custom-table-block thead, .custom-table-block tr, .custom-table-block td, .custom-table-block th{\r\n\t\theight: initial!important;\r\n\t}\r\n\t\r\n\t.custom-table-block tbody td{\r\n\t\tcolor:#092C47;\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 400;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tpadding: 7px;\r\n\t}\r\n\t\r\n\t.custom-table-block thead th{\r\n\t\tfont-family: Open Sans;\r\n\t\tfont-size: 16px;\r\n\t\tfont-weight: 700;\r\n\t\tline-height: 24px;\r\n\t\tletter-spacing: 0em;\r\n\t\ttext-align: left;\r\n\t\tcolor:#092C47;\r\n\t\tposition: relative;\r\n\t}\r\n\t.custom-table-block thead th:after{\r\n\t\tcontent:\"\";\r\n\t\tdisplay: inline-block;\r\n\t\tbackground-image: url(\"data:image\/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http:\/\/www.w3.org\/2000\/svg'%3E%3Cpath d='M10.585 0.585938L6 5.17094L1.415 0.585938L0 2.00094L6 8.00094L12 2.00094L10.585 0.585938Z' fill='%23476175'\/%3E%3C\/svg%3E%0A\");\r\n\t\tmargin-left: 8px;\r\n\t\tbackground-position: center center;\r\n\t\tbackground-size: 12px 7.5px;\r\n\t\tbackground-repeat: no-repeat;\r\n\t\twidth: 24px;\r\n\t\theight: 12px;\r\n\t}\r\n\t.custom-table-block{\r\n\t\tmargin: 20px 0;\t\r\n\t}\r\n\t.custom-table-block .table-wrapper{\r\n\t\twidth: 100%;\r\n\t\toverflow-x: auto;\r\n\t}\r\n\t@media(max-width: 768px){\r\n\t\t\/* .custom-table-block tbody td{\r\n\t\t\twhite-space: nowrap;\r\n\t\t} *\/\r\n\t\t.custom-table-block .table-wrapper{\r\n\t\t\tmax-width: calc(100vw - 16px);\r\n\t\t}\r\n\t}\r\n<\/style>\r\n\n\n\n<p><em>*PTFE or Teflon molecules are introduced into the controlled oxide preparation which gives a hard Teflon layer on the top along with oxide.<\/em><\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"source-sheet-metal-parts-with-finishes-at-xometry\"><strong>Source Sheet Metal Parts With Finishes at Xometry<\/strong><\/h2>\n\n\n<p>Finishing is a very important operation for sheet metal processes. Both plating and polishing help each other in improving the quality of the surface and increase both the physical and mechanical properties of the part.&nbsp;<\/p>\n\n\n\n<p>Xometry offers sheet metal services throughout Europe and our experienced team is always ready to help you.&nbsp;Upload your files to Xometry Instant Quoting Engine&nbsp;and get a quote in a matter of seconds for your sheet metal projects.<\/p>\n","protected":false},"author":50,"featured_media":11642,"comment_status":"open","ping_status":"closed","template":"","categories":[],"c-tag-articles":[],"global-tag":[585,593],"class_list":["post-11640","articles","type-articles","status-publish","has-post-thumbnail","hentry","global-tag-sheet-metal-tr","global-tag-post-processing-tr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Sheet Metal Finishes: Plating And Polishing | Xometry 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