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Anti-Tarnish of Nickel Plated Steel





We are encountering brown staining problems nickel flashing (1 um) cold formed steel. Any suggestions on the ideal anti-tarnish would be gratefully received.

Seamus Bourke
- Birmingham - England
2000



One micron nickel deposit is very porous and brown film usually appears on the steel parts during the drying cycle at elevated temperature.If you can not plate nickel thicker than 3 microns the only suggestion would be to neutralize parts with or w/o inhibitor in a mildly alkaline rinse prior to drying.

It sounds rather impractical nowadays, but the ancient method of drying parts in a saw dust at room temperature may prevent surface discoloration followed by air blow and oil/inhibitor dip.

Leon Goldin
- Seattle, Washington
2000




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