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Chrome plating vs yellow chromate

I received a specification from customer. It shows that the encapsulation should be yellow chromate in order to withstand long-term durability. I am quite confuse that what is the difference between chrome plating and yellow chromate. Please help.

Louis Lo
manufacturing - Hong Kong
2004

Miss Lo

Chrome Plating is a term used to describe a layer of chrome , usually over another layer of Bright Nickel for decorative functions. Usually the Nickel goes on first, followed by Chrome.. Chromate ( Chromating) is a term used to describe a chemical coating of zinc-chromium compound over a zinc plated layer. Chromating is done over Zinc, Aluminum and Magnesium to protect it from the atmosphere. It is best to have your principal specify the finish in clear terms.

Regards

Asif Nurie [deceased]
- New Delhi, India
With deep regret we sadly advise that Asif passed away on Jan 24, 2016
2004