Compositions: coating or plastic – Coating or plastic compositions – Corrosion inhibiting coating composition
106 1421, 106 1444, C09D 508
A process for forming a zinc phosphate coating on an aluminum substrate is provided to obtain good coverage by the coating. The coating preferably has a columnar or nodular crystal morphology and a coating weight of at least about 150 mg/ft.sup.2. The aluminum substrate is contacted with a zinc phosphate conversion coating bath which contains: (a) from about 0.4 to 2.5 g/l zinc ion; (b) from about 5 to 26 g/l phosphate ion; (c) from about 0.4 to 1.5 g/l fluoride ion; (d) from about 4 to 400 mg/l ferrous ion; and (e) from about 0.01 to 2 g/l ammonium ion. The zinc phosphate conversion coating is formable on an aluminum substrate in the presence or absence of an accelerator. Also provided is an aqueous zinc phosphate conversion coating concentrate which contains: (a) from about 10 to 60 g/l zinc ion; (b) from about 160 to 400 g/l phosphate ion; (c) from about 2 to 40 g/l fluoride ion; (d) from about 0.2 to 2.0 g/l ferrous ion; and (e) from about 1.0 to 25 g/l ammonium ion. The concentrate may be diluted with an aqueous medium in a weight ratio of about 1:10 to 1:100 to yield a zinc phosphate conversion coating bath.
patent: 2487137 (1949-11-01), Hoover et al.
patent: 2743204 (1956-04-01), Russell
patent: 2874081 (1959-02-01), Cavanagh et al.
patent: 2884351 (1959-04-01), Cavanagh et al.
patent: 3310239 (1967-03-01), Hesp et al.
patent: 3450579 (1969-06-01), Rausch et al.
patent: 4180406 (1979-12-01), Miyazaki et al.
patent: 4419199 (1983-12-01), Hauffe et al.
patent: 4443273 (1984-04-01), Saito et al.
patent: 4457790 (1984-07-01), Lindert et al.
patent: 4486241 (1984-12-01), Donofrio
patent: 4865653 (1989-09-01), Kramer
patent: 4983229 (1991-01-01), Tull
patent: 5203930 (1993-04-01), Blumlhuber et al.
patent: 5236565 (1993-08-01), Muller et al.
patent: 5238506 (1993-08-01), Cape et al.
patent: 5391239 (1995-02-01), Boulos
patent: 5401381 (1995-03-01), Seidel et al.
PPG Industries Inc.
Speer Timothy M.
Stachel Kenneth J.
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