If the packaging you send your parts in has dirt or oil please send us details on how you would like them to be re-packaged after finishing. Aluminum parts that are sanded after steel parts can get small particles of steel embedded in the aluminum substrate but will not be visible to the eye. Our etch process (depending on alloy used of course) can remove tiny scratches or fine lines but the more pronounced the mark or scratch the more likely it will show after finishing. Be sure that the “scratches” are really scratches. \"Almost\" is not the same as \"completely,\" though, and partly because of its resin content, a quartz counte… Extra dirt or oil on the parts can also present a challenge to our cleaning process. The usual rule of thumb is that if you can feel a scratch by rubbing your fingernail across the surface, you will be able to see the scratch after anodizing. Years of use have given them a variety of scratches down to bare aluminum. If there is any damage present to your parts when we un-package your order we will let you know. If they are deep scratches you are out of luck. Investigating Anodized Coating Failures Removing Anodizing From Aluminum Quickly and Easily. Some "scratches" are actually metal that was removed from the item doing the scratching. *Content written by Greg Wood, Chief Executive Officer. This will leave brass/bronze on the finish, which is OK. A deep car key scratch does not necessarily mean an expensive new paint job. Removing the scratch successfully involves using certain products and procedures to ensure no other damage is … Good cleaning of the aluminum before anodizing is essential to achieve an attractive finish. Please be aware that organically dyed parts do fade to some degree over time. Alpha Metal Finishing Company - All Rights Reserved. This is why we recommend providing an acceptable color range (light, medium, dark) prior to processing your parts. Anodized finishes will craze (crack) when the aluminum substrate is deformed in any fashion. If a part is to be viewed from 10 feet away, like a window or roofing component, then the inspection may be relatively insensitive to scratches. Ok, so anodizing probably isn’t what you want, but there are a few other things that might match what you’re looking for. Hardcoat anodizing on the other hand is typically .002 inches thick and can be buffed and polished with stainless steel rouge to a mirror finish. anyway, anodizing is a surface treatment to harden the aluminium and aslong as its polished up (ie remove any scratches), removing it won't affect the material properties. It’s easier to do that before than having to remove the hardened coating after the process has been done. Light & Medium Bronze-EXPECT COLOR VARIATION! Please avoid using strong acids, ammonia, lye, or alkaline cleaners. Light scratches in paint can easily be polished out, as polishing will create a new shine on the damaged painted surface. Color MatchingWe often receive requests to color match dyed parts. It is important to note that Alpha uses organic dyes which are not absolutely colorfast, especially in high UV exposure situations. That’s because clean, residue-free surfaces are critical to achieve blemish-free coatings. This is optional, but using a really strong acid can be a good way to prep the aluminum and remove any oxide that might be on it. Welded PartsIf parts are welded prior to being anodized please know that there will be surface and color variation on your finished product. Creating consistency in color and color matching is extremely difficult due to all the variables in the anodizing process (see more on this topic on the color anodizing page of Alpha’s website). The metal finish difference after blasting can be sanding off also but personally anodizing would probably be easier to remove. Can anodizing hide scratches? Download the PDF of Important Tips Prior to Anodizing. The usual rule of thumb is that if you can feel a scratch by rubbing your fingernail across the surface, you will be able to see the scratch after anodizing. since anodizing is a crystalline coating of hexagonal aluminum oxide, its tough, but non-directional. The same rule applies to metal finishing. We strive to provide superior quality and make parts look great for each and every customer by following best practices. Quartz can be engineered to look like granite or marble, but unlike either, quartz is a semi-synthetic material. Formed or Shaped PartsIf you have a product that needs to be formed or shaped in any way it should be completed before anodizing. For this reason, we recommend changing the belt or tumbling media prior to running aluminum parts to avoid any potential problems. However, if the part is to be viewed from 24″ or closer, then even a scratch which you cannot feel may be unacceptable. For this reason we recommend the use of nitrile gloves in the handling of all raw aluminum. 2) this is the hard part. If you are familiar with auto body or painting, you know that all imperfections on the metal must be filled or sanded prior to painting. If you do clean the aluminum parts prior to anodizing we recommend using mild soap/detergent, acetone, or alcohol. Some people call this “heat anodizing”, which is a totally incorrect term and has nothing to do with anodizing. ©2020 SAF Southern Aluminum Finishing Company. Paint, however, is easy to scratch, so … Manufacturers fashion quartz countertops using 93 percent ground quartz (silicon dioxide) and 7 percent resins, polymers and pigments. What does anodizing aluminum do? Polishing stainless steel cutlery, hulking appliances, toasters, platters and other household items can transform the hazy or scratched steel surface from flat and dull to twinkling and grand. We have encountered many instances where fingerprints corroded the aluminum and were not able to be removed by the cleaning/etch process. Our processing is limited in how it can remove metal shavings that are trapped in blind holes, which may lead to bleeding. prior to sending your parts to Alpha. What aluminum casting alloy is recommended for anodizing? So some areas may have to be masked before the powder-coat process. These pinpoint areas are not anodized and will be visible. Ted Mooney, P.E. It may be possible to spot anodize using a brush anodizing setup, but not for decorative parts. We do offer acid etch (for an extra cost) that will help hide some of the machine marks and lines by creating a matte finish. Anodizing cannot hide machine marks, scratches, extrusion lines or dents. These fractures can become openings to corrosion. 2010 - 2020 From what I understand, unfortunately you probably can’t. Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts.. This creates an undesirable cosmetic look that cannot always be reworked. Three day turnaround on painted SAF Aluminum, AAMA Specifications for painting architectural aluminum, Regarding AAMA 2605 Fluorocarbon Painting, Powder Coating-Series 28 Guide Specifications, Fabricating for Architectural Applications. Anodizing is a chemical process that creates a coating on the surface of a metal (usually aluminum), which makes the metal more durable and resistant to scratches and dings. We are happy to remove tape, dirt, or excessive oil at an additional cost. However, it is possible to repair a scratch on an anodised aluminium surface, such as an anodised aluminium metal hubcap. Think of the anodizing process as similar to film development. Anodizing also increases corrosion resistance and makes the metal easier to dye. ... Polishing with this compound will remove the light surface scratches left over from sanding with the 400 grit paper and is considered a “heavy cut” type of polishing. Please remove any steel pins, coils, etc. Fingerprints and Other Potential CorrosionPlease avoid leaving finger print marks on un-coated aluminum products as these can become imprinted on the surface of the metal. This will not eliminate stains or scratches, but will help to prevent dust and dirt buildup. Wipe down your anodized aluminum surface with a damp sponge to remove general surface dirt. In fact, there is no such thing as a pantone matched color in most commercial anodizing. Anodic films can also be used for a number of cosmetic effects, either with thick porous coatings that can absorb dyes or with thin transparent coatings that add interference effects to reflected light." Also, if your parts have been polished using a buffing compound please be aware that our chemicals may not be able clean off the compound well enough prior to anodizing. The anodizing process typically begins with the aluminum tube being cleaned in a nonetching alkaline chemical cleaner to remove all shop dirt, water, and soluble oils that may have accumulated on the tube's surface during handling and manufacturing. : I dislike the color of many anodized parts and tools, and I love the look of bare aluminum. It is always helpful for the finisher to understand the application. It is also good for the finisher and client to agree on a viewing distance. The Process of Anodizing. Because of the way MIG welding heats and cools it typically does not anodize properly and will not take color dye, which leaves a less than desirable cosmetic look. Unlike paint which is a thick coating with a shiny surface, anodizing is in fact a microscopic layer of clear oxide, which is dyed to create the colour. When packaging avoid putting any tape directly on the aluminum as it is difficult to clean off and is not removed by the anodizing process. Fortunately, it's easy to remove the anodized coating from … Anodizing aluminum is an extremely durable post-processing method. The steel particles will plate out and leave small pits on the surface of the aluminum after anodizing. It is important to note that raw aluminum exposed to water or even air, if left unprotected for even a short period of time, will oxidize. Belt Sanding or TumblingIf your parts are belt sanded or tumbled it is important to note that the belt or tumbling media should not be used with both steel and aluminum. All rights reserved. Anodizing aluminum provides increased wear and corrosion resistance and can add decorative color. If rack marks are critical or you have specific cosmetic requirements please discuss possible racking options in advance with us. This can look like a “scratch.”. Iron products such as steel cannot be anodized and will in fact be destroyed by the process. Any imperfection on the metal (dents or deep scratches) must be corrected prior to anodizing or coating. 1581 Huber Street Northwest, Atlanta, GA | toll free: +1-800-241-7429 | +1-404-355-1560 take 800 grit sandpaper (silicon dioxide - black - waterproof) and place wet over the scratch … This process removes any light oils and contaminants on the aluminum surface that … Steel Pins, Inserts, or RivetsAnodizing is only suitable for aluminum and its alloys. 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