Chromate Conversion Coatings

We offer two colours (or passivates/chromates) namely silver (also known as “clear” or “blue”) and gold (iridescent yellow).

Nitric based silver passivation  is normally used on moving parts and enclosed components.

Gold passivation is recommended for harsh environments and electronic components. We also recommend gold when parts are to be powder coated. 

Types of Chromate
Type of Chromate Time to white salts on zinc plate (salt spray test)
Clear (Bright Blue) 12-72 hours
Iridescent Yellow 72-250 hours