C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
C23F 11/14 (2006.01) C23F 11/10 (2006.01)
Patent
CA 2046512
ABSTRACT A method for inhibiting the corrosion of copper or copper-bearing metals in contact with an aggressive aqueous environment by combining a copper corrosion inhibitor with a chelant. Azoles are employed as the corrosion inhibitor. Characteristic chelants include ethylenediamine tetracetic acid nitrilotriacetic acid, citric acid, tartaric acid and dialkyldithiocarbamates.
Betz Laboratories Inc.
Betzdearborn Inc.
Borden Ladner Gervais Llp
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