Zinc Plating is a widely available solution for protecting steel parts from corrosion. One of the unique properties of zinc plating is that it is a sacrificial coating, meaning it will continue to protect a parts surface even if the coating becomes scratched and bare metal is exposed. Zinc plating is a two- part electrolytic process that utilizes a current of electricity to deposit a thin layer of Zinc onto a parts surface. The zinc layer coats the part acting as a protective barrier against moisture and ultimately corrosion.
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We are getting poor coverage on the as-cast surface of some steel castings using a yellow Zinc chromate. Our plater would like to go to a clear zinc, but our customer is under the assumption that the clear will not do as good a job with corrosion resistance and salt spray life. Can anyone give me some direction on how to get the customer to accept going to clear. Our plater said that he would be willing to go thicker on the clear.
ASTM B-633 Type II vs. III zinc plating
The rust not only harms the aesthetically smooth look, but also its mechanic needs. The Zinc coating provides a smooth look as well as good anti-corrosive protection. The coating is made according to demand, where the distribution is as follows:. The Zinc coating on the steel does not last shiny for long, and so a further thick layer coating is added, called passivation.