Metal treatment – Compositions – Heat treating
Patent
1980-07-14
1982-07-06
Kendall, Ralph S.
Metal treatment
Compositions
Heat treating
148 615R, C23F 700, C23F 708
Patent
active
043381405
ABSTRACT:
An aqueous acidic composition provides improved corrosion resistance to a metal, e.g., ferrous, zinc or aluminum surface upon contact. The composition contains dissolved hafnium and/or zirconium, fluoride, preferably a vegetable tannin compound, and optionally phosphate ions.
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Hopkins, Chapters in the Chemistry of Less Familiar Elements, vol. II, Stipes Pub. (1939), pp. 5-7.
Imperial Metal Industries, Chem. Abs. 71:33000u (1969).
Hooker Chemicals & Plastics Corp.
Kendall Ralph S.
Kluegel Arthur E.
Mueller Richard P.
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