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Black Oxiding for Tin Electroplate?




I have a customer who is asking about setting up a black oxide line for tin-plated steel and brass wire. I have heard of blackening of tin, but not exactly black oxiding of such. Our products would impart, at best, a darkening (maybe brown, gray or blue-ish), but I doubt that it would be BLACK. Any ideas or knowledge on this? Thanks!

randy fowler
Randall Fowler - Fowler Industrial Plating, LLC
Cleveland, Tennessee, USA
2006



2006

Grayish Black patina for tin:
200 gm iron(III)chloride
1 lit water

or

30 gm ammonium chloride
7,5 gm molybdenic acid
1 lit water
use hot solution,only for grease end oxide free objects!
Good luck!

Goran Budija
- Cerovski vrh Croatia



Goran, Thank you, thank you, thank you! I am going to pass this along to our R&D staff at corporate. Again, many thanks.

randy fowler
Randall Fowler - Fowler Industrial Plating, LLC
Cleveland, Tennessee, USA
2006




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