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Phosphating solution for metal surface treatment

A technology of metal surface treatment and phosphating solution, which is applied in the coating process of metal materials, etc., can solve the problems of frequent adjustment, uneven film formation, and irregular operation, and achieve simple and practical formula, good adsorption, and non-adhesion The effect of high molten metal properties

Inactive Publication Date: 2014-09-24
ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phosphating at room temperature can not only effectively reduce energy consumption, but also solve problems such as poor operation, large material consumption, frequent adjustments, uneven film formation, and high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A metal surface treatment phosphating solution, including the following mass percentage components: including the following mass percentage components: zinc dihydrogen phosphate 80g / l, ammonium molybdate 6g / l, magnesium sulfate 7g / l, calcium nitrate 20g / l, Hydrofluoric acid 1g / l, phosphoric acid 8g / l, nitric acid 10g / l, nickel nitrate 6g / l, sodium nitrite 2g / l, tartaric acid 4g / l, and the balance is water.

[0012] The beneficial effects of the present invention are: the formula of the present invention is simple and practical, the metal workpiece can be invaded into the phosphating solution, and a water-insoluble crystalline phosphate conversion film can be deposited on the surface at normal temperature. The matrix is ​​firmly bonded, with good adsorption, lubricity, corrosion resistance, non-adhesion to molten metal and high electrical insulation.

Embodiment 2

[0014] A metal surface treatment phosphating solution, including the following mass percentage components: including the following mass percentage components: zinc dihydrogen phosphate 100g / l, ammonium molybdate 9g / l, magnesium sulfate 10g / l, calcium nitrate 30g / l, Hydrofluoric acid 2g / l, phosphoric acid 12g / l, nitric acid 14g / l, nickel nitrate 8g / l, sodium nitrite 4g / l, tartaric acid 6g / l, and the balance is water.

[0015] The beneficial effects of the present invention are: the formula of the present invention is simple and practical, the metal workpiece can be invaded into the phosphating solution, and a water-insoluble crystalline phosphate conversion film can be deposited on the surface at normal temperature. The matrix is ​​firmly bonded, with good adsorption, lubricity, corrosion resistance, non-adhesion to molten metal and high electrical insulation.

Embodiment 3

[0017] A metal surface treatment phosphating solution, including the following mass percentage components: including the following mass percentage components: zinc dihydrogen phosphate 90g / l, ammonium molybdate 7.5g / l, magnesium sulfate 8.5g / l, calcium nitrate 25g / l l, hydrofluoric acid 1.5g / l, phosphoric acid 10g / l, nitric acid 12g / l, nickel nitrate 7g / l, sodium nitrite 3g / l, tartaric acid 5g / l, and the balance is water.

[0018] The beneficial effects of the present invention are: the formula of the present invention is simple and practical, the metal workpiece can be invaded into the phosphating solution, and a water-insoluble crystalline phosphate conversion film can be deposited on the surface at normal temperature. The matrix is ​​firmly bonded, with good adsorption, lubricity, corrosion resistance, non-adhesion to molten metal and high electrical insulation.

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PUM

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Abstract

The invention discloses a phosphating solution for metal surface treatment, which is characterized by comprising the following components in percentage by mass: 80-100g / l of zinc dihydrogen phosphate, 6-9g / l of ammonium molybdate, 7-10g / l of magnesium sulfate, 20-30g / l of calcium nitrate, 1-2g / l of hydrofluoric acid, 8-12g / l of phosphoric acid, 10-14g / l of nitric acid, 6-8g / l of nickel nitrate, 2-4g / l of sodium nitrite, 4-6g / l of tartaric acid and the balance of water. The invention has the following beneficial effects: the formula disclosed by the invention is simple and practical; and when a metal workpiece is immersed in the phosphating solution, a water-insoluble crystalline phosphate conversion film can be deposited on the surface at normal temperature, and the film is in a micropore structure, is firmly combined with the substrate, and has favorable adsorptivity, lubricating property, corrosion resistance, molten metal inadhesion property and high electric insulating property.

Description

technical field [0001] The invention relates to the field of metal surface treatment, in particular to a metal surface treatment phosphating solution. Background technique [0002] Phosphating is one of the important methods of anti-corrosion of metal materials. Its purpose is to provide anti-corrosion protection for the base metal, to be used as a primer before painting, to improve the adhesion and anti-corrosion ability of the coating layer, and to reduce friction in metal processing. Lubrication etc. Phosphating is a commonly used pretreatment technology, which should belong to chemical conversion coating treatment in principle. The main application in engineering is the surface phosphating of steel parts, but non-ferrous metals such as aluminum and zinc parts can also be phosphating. The pre-treatment process of steel surface coating refers to degreasing (degreasing), rust removal, surface conditioning, and phosphating. However, due to the different surface conditions...

Claims

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Application Information

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IPC IPC(8): C23C22/44
Inventor 汪洋陈启志
Owner ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES
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