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Title: Zinc phosphate conversion coatings

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.
  1. (Wading River, NY)
Issue Date:
OSTI Identifier:
Associated Universities, Inc. (Washington, DC) BNL
Patent Number(s):
US 5604040
Contract Number:
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY
Country of Publication:
United States
zinc; phosphate; conversion; coatings; producing; metals; exhibit; enhanced; corrosion; prevention; characteristics; prepared; addition; transition-metal-compound; promoter; comprising; manganese; iron; cobalt; nickel; copper; compound; electrolyte; polyacrylic; acid; polymethacrylic; polyitaconic; poly-l-glutamic; phosphating; solution; improved; incorporation; thermal; treatment; generate; alpha; -phase; anhydrous; improves; qualities; resulting; coated; metal; producing metal; polyacrylic acid; zinc phosphate; thermal treatment; acrylic acid; producing metals; polyitaconic acid; phosphate conversion; exhibit enhanced; coated metal; enhanced corrosion; methacrylic acid; conversion coatings; /428/148/