04338140 is referenced by 39 patents and cites 9 patents.

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.

Title
Coating composition and method
Application Number
879648
Publication Number
4338140
Application Date
July 14, 1980
Publication Date
July 6, 1982
Inventor
Gary A Reghi
Sterling Hts.
MI, US
Agent
Arthur E Kluegel
Richard P Mueller
Assignee
Hooker Chemicals & Plastics
MI, US
IPC
C23F 7/08
C23F 7/00
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