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Method for preparing blackening coating agent for metal surface treatment

A metal surface treatment and manufacturing method technology, applied in the direction of metal material coating technology, etc., can solve the problems of poor coating effect, difficult to degrade, poor adhesion, etc., to achieve improved defoaming effect, good thermal stability, adhesion and The effect of density improvement

Active Publication Date: 2014-12-17
湖南锦络电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of serious pollution, difficult degradation, poor coating effect and poor adhesion in the existing blackening solution, the invention provides a method for manufacturing a blackening coating agent for metal surface treatment. The ethylenediamine used in the invention Sodium tetramethylene phosphate can form chelates with metals, and the adhesion and density can be significantly improved by forming coordination bonds and covalent bonds with metal parts, effectively improving the corrosion resistance of metals, shortening the film forming time and stabilizing the coating. The film layer is uniform, and the blackening agent prepared by this method has good thermal stability, is non-toxic, harmless, easy to degrade, has no pollution to the environment, and has a wide range of applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of manufacture method of the black coating agent that is used for metal surface treatment, its steps are:

[0028] (A) take by weighing 3 parts of sodium nitrite and 4 parts of copper sulfate dissolved in 65 parts of deionized water, stirring fully dissolved;

[0029] (B) Add 4 parts of flavored nucleotide disodium, 5 parts of hydroxymethyl cellulose, 3 parts of sodium polyacrylate, 1 part of polyalkylene glycol, 0.6 part of paraben to the solution obtained in step (A) Methyl ester, 7 parts of complexing agent, heated and stirred for 20 minutes; the complexing agent is a mixture of sodium ethylenediamine tetramethylene phosphonate and sodium hydroxide, wherein sodium ethylenediamine tetramethylene phosphonate and hydrogen The weight ratio of sodium oxide is 6:1;

[0030] (C) Cool the solution in step (B) to 25°C, add 0.5 parts of thickener and 0.5 parts of defoamer and stir for 15 minutes; the defoamer is polyethylene glycol and polyoxyethylene ether, polyethyle...

Embodiment 2

[0034] With embodiment 1, difference is that this inorganic-resin black coating agent that is used for metal surface treatment, its component composition and weight ratio are: 1 part of sodium nitrite, 5 parts of copper sulfate, taste nucleotide disodium 2 parts, 8 parts of hydroxymethyl cellulose, 1 part of sodium polyacrylate, 1.6 parts of polyalkylene glycol, 1 part of methyl paraben, 10 parts of complexing agent, 2 parts of thickener, 0.2 parts of defoamer part, 40 parts of deionized water; the complexing agent is a mixture of sodium ethylenediamine tetramethylene phosphonate and sodium hydroxide, wherein the weight ratio of sodium ethylenediamine tetramethylene phosphonate and sodium hydroxide is 5 : 1; the thickener is polyacrylamide; the defoamer is polyethylene glycol and polyoxyethylene ether, and the mass ratio of polyethylene glycol and polyoxyethylene ether is 2:1.

[0035] The blackened coating agent prepared by the method can be used for the surface treatment of ...

Embodiment 3

[0037]With embodiment 1, difference is that this inorganic-resin black coating agent that is used for metal surface treatment, its component composition and weight ratio are: 5 parts of sodium nitrite, 3 parts of copper sulfate, taste nucleotide disodium 7 parts, 3 parts of hydroxymethyl cellulose, 5 parts of sodium polyacrylate, 2 parts of polyalkylene glycol, 0.2 parts of methylparaben, 12 parts of complexing agent, 1.2 parts of thickener, 0.8 parts of defoamer part, 70 parts of deionized water; the complexing agent is a mixture of sodium ethylenediamine tetramethylene phosphonate and sodium hydroxide, wherein the weight ratio of sodium ethylenediamine tetramethylene phosphonate and sodium hydroxide is 7 : 1; the thickener is polyacrylamide; the defoamer is polyethylene glycol and polyoxyethylene ether, and the mass ratio of polyethylene glycol and polyoxyethylene ether is 2.5:1.

[0038] The blackened coating agent prepared by the method can be used for the surface treatmen...

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Abstract

The invention discloses a method for preparing a blackening coating agent for metal surface treatment. The method comprises the steps that (A) sodium nitrite and copper sulfate are weighed according to the proportion and are dissolved into deionized water; (B) disodium nucleotide, hydroxymethyl cellulose, sodium polyacrylate, poly alkylene glycol, methylparaben and complexing agents are added into an obtained solution, heating is carried out, and stirring is carried out for 20 minutes; (C) the solution in the step (B) is cooled to 25 DEG C, thickening agents and defoaming agents are added into the solution, and stirring is carried out for 15 minutes; (D) intensive mixing and even dispersion are carried out, a 200-mesh bag type filter is adopted to filter the solution, the filtered liquid is the coating agent, and components are weighed by mass. The prepared blackening coating agent can obviously enhance the compactness and firmness of the coating, the problem that the thickness of the coating is uneven is effectively solved, and the blackening coating agent prepared through the method is good in heat stability, innocuous, easily degradable, free of pollution to the environment, and wide in application range.

Description

technical field [0001] The invention belongs to the field of organic / inorganic composite functional materials, in particular, it relates to a manufacturing method of a coating agent which can be used to prepare metal surface anti-corrosion coatings, more specifically, it relates to a method of a blackening coating agent for metal surface treatment Manufacturing method. Background technique [0002] Metal is easy to rust in humid air, so it is necessary to carry out certain treatment on metal to prevent it from rusting, especially for process conversion in factory production. The common treatment method is to blacken the metal. Blackening is a metal protection treatment process that prevents metal from rusting by forming an oxide film on the metal surface. Common blackening coating agents mainly include heating blackening coating agent and normal temperature blackening coating agent. The heating blackening treatment method is limited due to its high energy consumption and se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/68
Inventor 丁丹丹许旋徐震霖周红兵
Owner 湖南锦络电子股份有限公司
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