ZINCOVATE BLUE 291
Zincovate Blue 291 is a blue passivate for electroplated zinc. It will impart a uniform clear blue film which will produce a finish that meets 96-120 hours of neutral salt spray to white corrosion. The finish withstands heat treatment (3hrs/210°C and 24hrs/120°C).
Higher concentrations of Zincovate Blue 291 may be used as a thick film passivate. This will give a yellowish –greenish colour.
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