What Are The Categories Of Electroplating Coating?
Most electroplating coatings can be separated into these categories: Sacrificial Coating : is used primarily for protection. The metal used for the coating is sacrificial, being used up, in the reaction. Common metals include: zinc and cadmium (now forbidden in many countries). Decorative Coating : is used primarily for appeal and attractive purposes. Common metals include: copper, nickel, chromium, zinc and tin. Functional Coatings : are coatings done based on necessity and functionality of the metal. Common metals include: gold, silver, platinum, tin, lead ruthenium, rhodium, palladium, osmium, and iridium. Minor Metals : are normally iron, cobalt, and indium because they are easy to plate, but are rarely used in plating. Unusual metal Coating : are metals that are even more rarely used for plating than the minor metals. These include: As, Sb, Bi, Mn, Re, Al, Zr, Ti, Hf, V, Nb, Ta, W, and Mo. Alloy Coatings : An alloy is a substance that has metallic properties and is made up of two or more elements. These coatings are made by plating two metals in the same cell. Common combinations include: gold–copper–cadmium, zinc–cobalt, zinc–iron, zinc–nickel, brass (an alloy of copper and zinc), bronze (copper–tin), tin–zinc, tin–nickel, and tin–cobalt.
