Gary Price

Topic: Chemicals used for Copper-Selenium Blackening of Steel

Can anyone tell me the names of the chemicals used in the preparation of the steel blackening process known commercially as: e-black or Blackfast? I have learned that the compound produced on the surface is Cu2Se.

I want to set up a blackening process up for students in a metal working class at the School of Mines, Ballarat, Australia, where I teach. As I have analytical chemistry qualifications, I want to control the efficiency of the process by analysis.

Companies who supply the chemicals seem to "not want" to respond to my queries.

Thanks to anyone who can help me!

DustinGebhardt

Re: Chemicals used for Copper-Selenium Blackening of Steel

The processes I have used are for blackening copper to create Cu2Se are primarily made from phosphoric acid and seleneous acid.  I suppose you could add some copper (via copper sulfate?) to the mix and try to get a immersion deposit of copper onto the steel, which may then blacken.

-Dustin Gebhardt, CEF

Advanced Manufacturing/Finishing Engineer

Moen

Sanford, NC

hanif786

Re: Chemicals used for Copper-Selenium Blackening of Steel

Companies who supply the chemicals seem to "not want" to respond to my queries.