Coating processes – With pretreatment of the base – Metal base
Patent
1986-03-17
1987-03-03
Hayes, Lorenzo B.
Coating processes
With pretreatment of the base
Metal base
106 1405, 10628716, 427384, 4273977, 427402, A21D 400
Patent
active
046474790
ABSTRACT:
A corrosion-inhibiting coating composition for application onto rusted steel or iron surfaces is disclosed. The coating composition comprises an organic silicate, citric acid, and a non-aqueous solvent. The organic silicate is preferably present in an amount sufficient to provide about 12% to 24% silicon dioxide in the cured coating from the composition and is preferably pre-hydrolyzed in an amount of about 70% to 90%. Citric acid is preferably present in an amount of about 0.1 to 0.2 grams per cubic centimeter of the coating composition. Dissolution and complexation of the rust by the citric acid provides a pigment which causes the organic silicate to become a film-forming binder. Zinc chloride is preferably added to the composition to increase the rate of rust dissolution and to improve binder properties.
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Ameron Inc.
Hayes Lorenzo B.
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