Zinc plating is widely used for anti-rust purpose in industrial components. Zinc plating is to electrodeposit a thin layer of zinc metal onto the surface of metal object, known as a substrate. The zinc coating layer creates a physical boundary that prevents rust from reaching the underlying metal surface.
There are generally two plating methods for applying zinc coatings include the use of rack and barrel plating processes. We normally apply rack zinc plating for smaller or delicate parts which couldn't withstand rotating tumbling barrel. As for barrel zinc plating, it is much more cost effective for plating many parts at once.