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Letter 22073
Testing of Black Chrome Coating
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We are trying a Black chrome plating on a component which may come
in contact with food. We want to know whether black chrome is non
toxic or not and if any testing standard is available or not.
Regards,
Munish Kaushal
- Mumbai, Maharashtra, India
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Mr Kaushal
Are you doing Black Chrome plating from a Hexavalent Chrome Bath ?
Or are you Black Passivating a zinc plated Component?
In both cases the coating could cause harm if edible food stuff is
permitted to come in contact. ( Acidic foodstuff may slowly dissolve
the layer)
The solution is not cheap if Black is what you want..
Use Black gold if cost permits. Or take a deviation from your
client, and plate tin.
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