Plating is done to metal to provide an additional layer of protection. This protection is primarily to prevent moisture from coming in direct contact with the base metal and causing oxidation. Through advanced plating processes, a specific thickness of a non-corrosive type of metal or combination of metals is bonded to the surface.
The use of zinc nickel alloy plating provides superior corrosion protection across many different industries. It is most often used in automotive parts and components as this is one plating that can stand up to high temperatures without cracking or problems with thermal shock. This is of particular importance in engine components, but it is also highly resistant to any type of corrosion. Exposure to water, snow, and slush from roads, which is often combined with salt, has little effect on the surface.
In addition, zinc nickel alloy plating, like other types of zinc alloy plating, is a good option when wear may be an issue for the part or complete. With the natural protection of the surface of the metal, there is less need for surface lubrication on the part.
For automotive engine parts and components, this increased durability combined with the decrease in surface wear is particularly important. Less lubrication is required and extended use, even in heavy-duty engines and equipment, allows for longer life cycles and lower maintenance needs. This protection and wear resistance are further enhanced by the use of the coating films that will help to decrease friction for moving parts.
It is important to talk to the plating service to discuss the specific tolerances and requirements for the parts and components. There are different solution types from alkaline to acid that can be used in this process, each which has its own benefits for specific end use requirements.