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Blueing high-chromium steel

We are looking for a formulae for blueing steels which contain high-chromium steel; our current hot solution which consists of a mixture of Nitrate/Nitrite/Caustic (180 Ltr Tank) will not Blue/Brown steel which has been hardened and sandblasted to remove any scale.

Thanks,

Michael Eric Douglas
Engineering Shop - Perth, Australia
2005

Old Fishlocks book on metal colouring [on AbeBooks affil links] (Teddington 1962) is something for you, Michael. Good luck!

Goran Budija
- Cerovski vrh Croatia
2005

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