Tag Archives: Metal Coating

What Type of Metal Coating is Right for Your Project?

Metal CoatingMetals can produce a variety of things – from industrial equipment and consumer electronics to aircraft and automobiles. The only downside to using metals as primary materials is that it is susceptible to corrosion. 

Kenro shares that to delay or eliminate this, metal manufacturers use coatings as preventive measures. For the many types of metals, there are also various types of coating that emit different appearances and serve different purposes.

Hot-Dip Galvanizing

This involves dipping a piece of steel into molten zinc. After the zinc sticks to the steel, it immediately reacts with oxygen, forming an oxide layer that prevents corrosion. The coating does not flake off because of the metallurgical bond between the steel and the zinc. Plus, manufacturers can paint this to the customer’s specifications.

Electroplating

For this process, it uses electric current to adhere the solution of either chromium or cadmium to a metal. With this type of metal coating, however, it may be difficult to achieve a consistent thickness. But it does provide a pleasing appearance, as well as prevents corrosion.

Powder Coatings

This is the more environmentally friendly choice when it comes to metal coatings because it does not require the use of solvents. They also come in an array of colours.

Anodizing

Commonly used with aluminium – also used on titanium or zinc, anodising increases the thickness of the aluminium oxide layer, making it even more resistant to corrosion. This process also serves as an adhesive for other finishes and paints.

The Appropriate Thickness

To determine the thickness of the coating you need, it is important that you understand the environment the product is going to stay in. Different environments have various rates of corrosion. Air impurities and temperature, for example, are major contributors as they cause dramatic effects on certain metals, such as zinc.

For your next project, make sure that you coordinate with your contract manufacturer about what type of metal and coating they will use so that you are informed. This will also help you gauge the lasting effects of their product’s resistance to corrosion.