Process for improving corrosion resistance of anodized metal sur

Details Process for improving corrosion resistance of anodized metal sur Process for improving corrosion resistance of anodized metal sur

1977-06-17

1978-04-11

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

427419A, C25D 1118

Patent

active

040837564

ABSTRACT:
Corrosion resistant anodized metal surfaces are produced by electrically oxidizing a metal such as aluminum or aluminum alloys to form an oxide layer of about 0.0002-0.001 inch, rinsing and sealing in a boiling aqueous solution of a polycarboxylic acid with perfluorinated portions such as ##STR1## wherein X is independently at each occurrence H or F, m and n are independently 0 to 10 and R.sub.f is C.sub.p F.sub.2p+1--where p i 6 to 24 or C.sub.q F.sub.2q+1 O--where q is 3-12.

REFERENCES:
patent: 3012917 (1961-12-01), Riou et al.
patent: 3380860 (1968-04-01), Lipinski
patent: 3440150 (1969-04-01), Kramer et al.
patent: 3838023 (1974-09-01), Friedemann

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