Zinc phosphate conversion coatings

Details Zinc phosphate conversion coatings Zinc phosphate conversion coatings

1995-12-01

1997-02-18

Silverberg, Sam

Stock material or miscellaneous articles

Composite

Of metal

148262, 148251, C23C 2212

Patent

active

056040407

ABSTRACT:
Zinc phosphate conversion coatings for producing metals which exhibit enhanced corrosion prevention characteristics are prepared by the addition of a transition-metal-compound promoter comprising a manganese, iron, cobalt, nickel, or copper compound and an electrolyte such as polyacrylic acid, polymethacrylic acid, polyitaconic acid and poly-L-glutamic acid to a phosphating solution. These coatings are further improved by the incorporation of Fe ions. Thermal treatment of zinc phosphate coatings to generate .alpha.-phase anhydrous zinc phosphate improves the corrosion prevention qualities of the resulting coated metal.

REFERENCES:
patent: 3558442 (1971-01-01), Roehl et al.
patent: 4659395 (1987-04-01), Sugama et al.
Lenz, et al., J. Polymer Sci., vol. 58, pp. 351-367 (1962).
Kojima, et al., Tetsu to Hagane, vol. 66, pp. 924-934, (1980) [in Japanese].
Leidheiser, et al., J. Electrochemical Society, vol. 128, pp. 241-249, (Feb. 1981).
Sugama, et al., J. Materials Sci., vol. 19, pp. 4045-4056, (1984).
Sugama, et al., J. Materials Sci., vol. 19, pp. 4045-4056, (1984).
Sommer, et al., Corrosion, vol. 43, pp. 661-665, (1987).
Sugama, et al., J. Materials Sci., vol. 22, pp. 722-736, (1987).
Sugama, et al., J. Materials Sci., vol. 23, pp. 101-110, (1988).
Sugama, et al., J. Coatings Tech., vol. 61, pp. 43-57, (Apr. 1989).
Sugama, et al., J. Materials Sci., vol. 26, pp. 1045-1050, (1991).
Sugama, et al., Materials and Manufacturing Processes, vol. 6, pp. 227-239, (1991).
Sugama, et al., Surface and Coatings Tech., vol. 50, pp. 89-95, (1992).
Sugama, et al., J. Applied Polymer Sci., vol. 45, pp. 1291-1301, (1992).

Affiliated with

Also associated with

Rating

Zinc phosphate conversion coatings does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Zinc phosphate conversion coatings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zinc phosphate conversion coatings will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1601396