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Different Types of Protective Coating Systems Used in Metal Protection

There are three different types of protective coating systems used to prevent ferrous metals from corroding, making them a lot tougher and more durable. These coatings are also used to improve the appearance of the surface, giving them great aesthetic properties.


Each type metal coating accomplishes different goals and offer their own appearance and benefits.


To help you with these different types of protective coating systems, here is a breakdown from the experts at Teff-Line.


Anodizing - One of the most popular types of protective coating systems used for aluminum is anodizing. This metal coating is also used on other metals like titanium and zinc. However, ferrous metals can’t be anodized due to their iron oxide, or rust, flakes off, which can cause the layer to also flake off the surface. When aluminum is exposed to oxygen, the layer of aluminum oxide is formed on the metal surface. This process is very effective when it comes to increasing the thickness of the aluminum oxide layer, making the surface more resistant to corrosion. A clear sealant can also be used to further increase the durability and corrosion resistance of the surface.


Galvanizing - This protective coating system applies a layer of zinc to a ferrous metal to protect it from corrosion. This is also called hot-dip galvanizing, where a piece of steel is dipped into a bath of molten zinc. The zinc adheres to the steel and it immediately reacts with oxygen in the air to form a very strong layer of zinc oxide. This layer provides the steel with excellent protection against corrosion, making it tough and durable. 


Powder Coating - This is where a dry powder is electrostatically applied to a metal part. The part is cured at about 200 degrees Fahrenheit to produce a consistent and pleasing appearance. This process is generally more environmental friendly compared to paints that uses solvents.


Protective coating systems can increase the life-span, quality and aesthetic qualities of tools, manufactured products and much more. To learn more about coating systems, call us or visit Teff-line today to request a consultation.

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