Metal treatment – Compositions – Heat treating
Patent
1981-10-09
1983-01-25
Silverberg, Sam
Metal treatment
Compositions
Heat treating
148 614R, C23F 706
Patent
active
043701779
ABSTRACT:
In an acidic aqueous coating solution which contains zirconium, hafnium or titanium, and fluoride and which is effective in forming on an aluminum surface a non-chromate coating to which overlying coatings adhere tightly and which is corrosion resistant and resists being discolored when subjected to hot water, the improvement comprising including in said coating solution a combination of surfactants in an amount such that a coating formed from the surfactant-containing coating solution has an improved tendency to resist being discolored by hot water.
REFERENCES:
patent: 4054466 (1977-10-01), King et al.
patent: 4148670 (1979-04-01), Kelly
patent: 4191596 (1980-03-01), Dollman
patent: 4277292 (1981-07-01), Tupper
patent: 4313769 (1982-02-01), Frelin
Payne, Organic Coating Technology, vol. 1 (1954) Johny Wiley and Sons pp. 554, 556.
Frelin Frank J.
Kelly Timm L.
Malloy Anthony J.
Amchem Products Inc.
Millson Jr. Henry E.
Silverberg Sam
Szoke Ernest G.
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