GEL CONTAINING PHOSPHATE SALTS FOR PASSIVATION
First Claim
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1. A phosphate gel for passivation, which is used for the acid washing and phosphate coating of a corroded metal material, in which the phosphate gel is prepared by heating and cooling an aqueous phosphate solution, containing 30-70 wt % of phosphoric acid, 0.5-10 wt % of zinc powder, 0.5-5 wt % of calcium phosphate, 0.5-5 wt % of sodium molybdate, 0.5-10 wt % of gluconic acid, 0.1-1 wt % of a non-ionic surfactant, 1-4 wt % of gum and 12.8-66.9 wt % of water.
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Abstract
Disclosed herein is a phosphate gel for passivation, which is used for the acid washing and phosphate coating of a corroded metal surface. The phosphate gel contains phosphate and gum.
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2 Claims
- 1. A phosphate gel for passivation, which is used for the acid washing and phosphate coating of a corroded metal material, in which the phosphate gel is prepared by heating and cooling an aqueous phosphate solution, containing 30-70 wt % of phosphoric acid, 0.5-10 wt % of zinc powder, 0.5-5 wt % of calcium phosphate, 0.5-5 wt % of sodium molybdate, 0.5-10 wt % of gluconic acid, 0.1-1 wt % of a non-ionic surfactant, 1-4 wt % of gum and 12.8-66.9 wt % of water.
Specification