Reasons for plating parts
Materials made of metals, alloys and other compounds are always exposed to corrosion, oxidation, impact, pressure, wear and other difficult physical conditions, many of these materials do not have adequate resistance against these conditions and the ability to meet They do not have our desires. One of the common ways to improve these properties is plating. For this purpose, generally a layer of metal or alloy that has better properties and resistance against these conditions is placed on the target product.
Suitable for plating metals:
The materials used for plating are determined depending on the characteristics expected from the final product. Also, the conditions of performing the operation and the bathroom used are also involved in this matter. Here are the commonly used materials:
Nickel, black nickel/chrome, chrome, palladium or palladium/nickel alloy, gold, silver, copper, tin, platinum, ruthenium, cadmium, brass and zinc
What metals are used in plating?
The metals used in electroplating include zinc-copper-tin and precious metals such as gold, silver and palladium.
Cost of plating metals:
Plating can happen with one metal alone or with a combination of several metals. Metals that can increase the added value of plating. The price, the composition of the desired part and the desired result are the three key factors that are considered in most operations. They are:
The alloy price is based on the global market rate
The composition and surface of the desired piece
Desired result and quality
How does plating happen?
Anode and cathode (cathode: the part that is going to be electrically coated) are both immersed in an electrolytic bath, which is a solution containing the salt of the metal that is going to be coated. A dc current passes through this solution. The phenomenon of transfer of metal ions to the surface of the cathode occurs, which finally settles on the part connected to the cathode.
The phenomenon of electrochemical plating is almost similar to the phenomenon of electroforming. Both work according to electrical substitution.
But their difference: in electroplating, the metal that is deposited is the same metal that is supposed to be plated. In electroforming, a shell is removed from the target piece. After the shell is removed, the desired object is completely covered by electroforming. After electroforming, it is possible to perform electroplating on it, and by the coating that is done, it increases corrosion resistance or better attractiveness for ornamental products.
In addition to the two mentioned methods can be used separately, they can also be used as two complementary methods.
