Coating compositions containing nickel and boron
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United States of America Patent
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May 23, 2000
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N/A
app pub date -
May 8, 1998
filing date -
May 8, 1998
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Abstract
The invention is directed to corrosion and wear resistant metallic coatings containing nickel and boron. The coatings are preferably deposited on catalytically active substrates from an electroless coating bath containing nickel ions, lead tungstate as a stabilizer, a metal ion complexing agent, and a borohydride reducing agent, at a pH of about 10 to about 14. With post-coating heat treatment the coated surfaces exhibit hardness levels as high as about 2200 Knoop.
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