Understanding the Use of Zinc Electroplating

Zinc electroplating is low in cost which is why it is commonly used on metals. It has an attractive appearance and protective nature. The coating will give a corrosion protection to ferrous components and can also give colors like black, gold or olive drab finish after the treatment. Zinc can act as a coating against the atmospheric corrosion of steel and iron. It prevents oxidation by forming a barrier which acts as a sacrificial anode and when this barrier is damaged, the zinc prevents the breakdown of the substrate’s surface integrity.

What is the process used on?

The process of zinc electroplating can be used on bolts, nuts, automotive parts and washers like gas filters. It also helps provide an undercoat for paints when high corrosion performance is essential. There are various zinc plating solutions which are used for the process, these include acid chloride, cyanide, alkaline non cyanide and zinc alloys for the purpose of electroplating include zinc nickel and zinc iron. Iron and steel are the two most common metals which are plated through this process. Any metal that is exposed to the weather can end up with corrosion. The plating helps maintain the exterior elegance and interior strength of the product.

What is the coating characteristic?

Zinc plating is usually dull gray in color with a matte finish and there are more lustrous coatings which can also be produced based on the agents added to the plating bath or through post treatments. The coating is thin which restricts the zinc plated parts to mild indoor exposure. Most light switch plates and light fasteners have zinc plating on them. The materials for use in severe applications need to be chromate conversion coated. It is a purely zinc coating which has a hardness of about one third to one half of most steels.

What are the benefits?

There are a number of benefits of zinc plating. These include an improvement in corrosion resistance with a reduced finishing cost for the parts. It is also easy to apply and has an improved adhesion. The zinc plating can be used as a paint undercoat as well. Manufacturers choose to use zinc plating on their products in order to enhance the exterior look and to ensure high durability. Consumers would like to buy products that are strong and long lasting. If the product is not zinc plated, it might not look as appealing and could corrode in no time. With zinc plating, the quality of the product is improved in a cost effective manner.


Sun-Glo.com is one of the leading metal finishing companies offering services including type I, II & III anodizing, CARC painting, passivation, Swiss machining, cadmium plating, copper plating, gold plating, silver plating, tin plating, zinc electroplating, etc. To know more, visit http://www.sun-glo.com/blog/.



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