Why you need Anodizing of metals
- by Ron victor
- Published on 5/12/08
- Article views: 653
Aluminum alloys are always an excellent choice of metal for home machining. It can be used on mini-lathe to make telescope parts or camera adapters and other helpful bits and pieces. But there is an unfortunate drawback in using aluminum this way. The key advantage and disadvantage of this metal is its relative softness towards other metals such as steel. This supple nature makes it very easier to engine on a mini-lathe than steel, but, if once you have completed your part, it is very liable to tiny dents and surface scratches.
When chemically speaking, aluminum is an awfully reactive metal. We all are familiar with the action of our environment on iron. It will oxidize pretty readily to form iron oxide - or rust as more commonly known. Aluminum is highly reactive than iron, and, so, will rust more readily. Yet, with aluminum a rough coat of aluminum oxide will be formed which strongly inhibit further oxidation of the metal. Due to this aluminum is known for its elasticity in corrosive environments like car radiators or boats. In later period of time aluminum 'rusts' - and slowly produce a white powdery coat.
For the aluminum industry there is a system to overcome the inbuilt softness of the metal and protects against oxidation. Using chemical process it is possible to build a layer of aluminum hydroxide on the surface of the metal that is very hard and more durable than the rough naturally oxidized film that normally forms. This process involves suspending the aluminum in acid bath and passing electric current through it. And this is known as anodizing. It is an electrochemical method that works with the porous makeup of the aluminum. This process thickens and toughens the naturally occurring protective oxide. Thus it offers a higher life span to the product. As anodic coating becomes part of the metal, it is one of the hardest substances for metal finishing. Anodizing also adds durability and color stability.
The advantage of anodizing aluminum is the latent of colored anodizing dye. It seeps into the microscopic pores of the anodized part and gives colors to it. This layer is then sealed and the color appears as part of the metal itself. This can generate great artistic effect, making aluminum parts with strikingly tasteless colors to ornament your motor bike or more topically, your telescope. With visual applications, black is the most popular anodizing color in order to reduce the internal reflections. Of course, black is supposed to be one of the hardest colors to achieve and so the commercial black anodizing dye is fetching the highest price in the market.
Anodizing aluminum is a fairly simple process, and providing you can put your hands on the correct chemicals (sulfuric acid) it is rather straightforward to do simple anodizing aluminum in home. You could limit yourself to anodizing in fairly small amounts - but if you want to anodize a large object you require a lot of electrical power and acid, so if you want to it for an entire bike frame in one go, You can contact an aluminum anodizing company.
Ron Victor is an Expert author for Houston chromium anodizing. He has written many articles like Dallas anodizing coating, Austin zinc plating, Chromate conversion on Houston. For more information visit metal-tekinc.com. contact him at ron.seocopywriter@gmail.com
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