Metal coating is applied for 3 purposes.
- Corrosion protection
Corrosion is a very important threat for metals and metal alloys, the value of which is increasing day by day with the developing technology. Economically, it causes great losses to every country. Material, energy and labor loss due to corrosion is approximately 3.5% - 5% of the gross national product of our country. In addition to financial losses, corrosion is a process that harms human health and causes environmental pollution.
Coating can be applied to material surfaces in order to provide the superior properties required by industrial engineering. As an example of these features; surface hardness, electrical conductivity, high corrosion resistance, lubricity and wear resistance can be shown. Aesthetics may not be prioritized in engineering-oriented coatings.
- Decorative appearance
The prominent feature of decorative coatings is that the surface has a glossy appearance. In this type of chrome plating, the plating thickness varies between 0.13 – 1.5 microns. This thickness may not be sufficient to protect the part surfaces against corrosion and wear. For this reason, in decorative coatings, the parts are chrome plated after nickel or copper plating. Higher corrosion resistance is achieved by reducing interconnected pores and defects in multi-layer coatings.