One-step oil and rust removal phosphatization liquid for steel workpieces

A technology for phosphating solution and workpieces, which is applied in the coating process of metal materials, etc., can solve the problems of difficulty in maintaining the concentration of phosphating solution components, long phosphating film formation time, and large changes in phosphating solution components, etc., to achieve easy Effects of treatment and regeneration, reduction of investment and operating area, and less sediment

Inactive Publication Date: 2014-12-31
WUXI LUOSHE TECH VENTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Publication number CN85100689A "a kind of derusting phosphating solution", CN1030947A "degreasing and derusting phosphating solution", CN1038470A "iron and steel surface treatment agent-a new type of derusting and antirusting agent" are all composed of phosphoric acid, trisodium phosphate, chromic acid, surface Activator, etc. This kind of phosphating solution has the advantages of rust removal, oil removal and rust removal or rust removal and anti-rust. The phosphating of iron and steel workpieces is treated at 30-65°C. Dry in air and continue natural phosphating. Although this phosphating solution solves the problem of reducing residues, the phosphating treatment of steel workpieces before coating still needs to be heated, and after natural air-dry phosphating, the phosphating film takes a long time to form. In the case of high ambient humidity, iron and steel workpieces are prone to yellowing and rusting problems. During the phosphating process of iron and steel workpieces, the composition of the phosphating solution changes greatly, and it is difficult to maintain the concentration of the phosphating solution components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A one-step degreasing and derusting phosphating solution for iron and steel workpieces. The phosphating solution is composed of: 85% phosphoric acid 165g / L, nickel dihydrogen phosphate 28g / L, zinc dihydrogen phosphate 14g / L, cobalt dihydrogen phosphate 8g / L, sodium chlorate 6g / L, sodium m-nitrobenzenesulfonate 4g / L, yellow blood salt 2g / L, ammonium molybdate 3g / L, thiourea 2g / L, tartaric acid 15g / L, OP-106g / L L, the balance is water.

Embodiment 2

[0018] A one-step degreasing and derusting phosphating solution for iron and steel workpieces. The phosphating solution is composed of: 85% phosphoric acid 175g / L, nickel dihydrogen phosphate 22g / L, zinc dihydrogen phosphate 18g / L, cobalt dihydrogen phosphate 6g / L, sodium chlorate 8g / L, sodium m-nitrobenzenesulfonate 2g / L, yellow blood salt 4g / L, ammonium molybdate 1g / L, thiourea 4g / L, tartaric acid 11g / L, OP-1010g / L L, the balance is water.

Embodiment 3

[0020] A one-step degreasing and derusting phosphating solution for iron and steel workpieces. The phosphating solution is composed of: 85% phosphoric acid 170g / L, nickel dihydrogen phosphate 25g / L, zinc dihydrogen phosphate 16g / L, cobalt dihydrogen phosphate 7g / L, sodium chlorate 7g / L, sodium m-nitrobenzenesulfonate 3g / L, yellow blood salt 3g / L, ammonium molybdate 2g / L, thiourea 3g / L, tartaric acid 13g / L, OP-108g / L, the balance is water.

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PUM

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Abstract

The invention discloses a one-step oil and rust removal phosphatization liquid for steel workpieces. The phosphatization liquid comprises 165-175g/L of 85% phosphoric acid, 22-28g/L of nickel dihydrogen phosphate, 14-18g/L of zinc dihydrogen phosphate, 6-8g/L of cobalt dihydrogen phosphate, 6-8g/L of sodium chlorate, 2-4g/L of sodium m-nitrobenzene sulfonate, 2-4g/L of potassium ferrocyanide, 1-3g/L of ammonium molybdate, 2-4g/L of thiourea, 11-15g/L of tartaric acid, 6-10g/L of OP-10, and the balance of water.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a one-step degreasing and derusting phosphating solution for iron and steel workpieces. Background technique [0002] After the chemical reaction between the metal and phosphoric acid or phosphate, a stable phosphating film with a thickness of several microns can be formed on the metal surface, and the phosphating film provides protection for the metal substrate, that is, improving the corrosion resistance and wear resistance of the metal. Moreover, the phosphating film can also withstand short-term high-temperature baking above 400 °C, and can ideally improve the adhesion of the metal surface coating layer, and play the role of anti-friction and lubrication in the metal cold processing process. [0003] Publication number CN1283710A discloses a kind of "phosphating solution and phosphating process for steel cold deformation processing", publication number CN1115794A di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/42
Inventor 高忠清
Owner WUXI LUOSHE TECH VENTURE
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