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Alkaline phosphating solution, preparation method and phosphating treatment process

A phosphating solution and alkaline technology, which is applied in the coating process of metal materials, etc., can solve the problems of poor phosphating film quality, cumbersome treatment process, uneven adhesion, etc., achieve uniform adhesion, reduce process steps, and improve phosphating efficiency effect

Active Publication Date: 2019-03-26
SHANGHAI UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an alkaline phosphating solution, a preparation method and a phosphorus Chemical treatment process, can effectively control the quality of phosphating film, uniform adhesion, simplify the process steps

Method used

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  • Alkaline phosphating solution, preparation method and phosphating treatment process
  • Alkaline phosphating solution, preparation method and phosphating treatment process
  • Alkaline phosphating solution, preparation method and phosphating treatment process

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Dissolve 1.5g of zinc phosphate tetrahydrate in 10mL of 3.5mol / L ethylenediamine aqueous solution to prepare a colorless and transparent alkaline phosphating solution. Drop the obtained alkaline phosphating solution on the iron plate, and after natural drying, it can be seen that a circular phosphating film is formed on the iron plate, such as figure 1 shown.

Embodiment 2

[0041] Dissolve 0.75g of zinc phosphate tetrahydrate in 10mL of 1.75mol / L ethylenediamine aqueous solution to prepare a colorless and transparent alkaline phosphating solution. Drop the obtained alkaline phosphating solution on the iron plate, and after natural drying, it can be seen that a circular phosphating film is formed on the iron plate, such as figure 2 shown.

Embodiment 3

[0043] Dissolve 0.375g of zinc phosphate tetrahydrate in 10mL of 0.875mol / L ethylenediamine aqueous solution to prepare a colorless and transparent alkaline phosphating solution. Drop the obtained alkaline phosphating solution on the iron plate, and after natural drying, it can be seen that a circular phosphating film is formed on the iron plate, such as image 3 shown.

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Abstract

The invention discloses an alkaline phosphating solution, a preparation method and a phosphating treatment process. The alkaline phosphating solution comprises an aqueous solution of polyvalent metalphosphate and an alkalescence complexing agent. The preparation method of the alkaline phosphating solution comprises the step of dissolving the polyvalent metal phosphate and the alkalescence complexing agent in water. The phosphating treatment process comprises the steps of applying the alkaline phosphating solution to the surface of a metal substrate, and conducting drying. By means of the alkaline phosphating solution, the preparation method and the phosphating treatment process, the quality of a phosphating film is effectively controlled, the phosphating film is uniformly attached, and the phosphating treatment process steps are simple.

Description

technical field [0001] The invention relates to an alkaline phosphating solution, a preparation method and a phosphating treatment process. Background technique [0002] The phosphating process has been used in industry for more than 90 years. The phosphating film can provide protection for the base metal and prevent the metal from being corroded to a certain extent; it can be used as a primer before painting to improve the adhesion and anti-corrosion ability of the paint film layer; it can be used for anti-friction lubrication in the metal cold processing process. [0003] At present, almost all phosphating solutions are acidic. By adding acidic substances such as phosphoric acid into the phosphating solution, the dissolution of insoluble phosphate in water is promoted; during phosphating treatment, the free acid reacts with the metal substrate, which increases the pH value of the phosphating solution, resulting in dissolution in the phosphating solution. The phosphate in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/60
CPCC23C22/60
Inventor 石国升方海平杨海军盛世奇杨建仁段满益
Owner SHANGHAI UNIV
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