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Environment-friendly universal metal surface pretreatment liquid and use method

A general-purpose technology for metal surfaces, applied in the coating process of metal materials, etc., can solve a large number of phosphating waste residues, environmental pollution and other problems, and achieve the effects of optimizing film quality, improving corrosion resistance, and improving paint film adhesion

Active Publication Date: 2015-10-21
QINGDAO GERUIXI METAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the film-forming principle of the phosphating film determines that a large amount of phosphating waste residue and waste liquid will be produced during the phosphating process, which will cause serious environmental pollution problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An environment-friendly metal surface treatment solution based on multifunctional alkyl phosphate ester, the mass percentage of raw materials is as follows: phytic acid 1%, zinc oxide 2%, sodium molybdate 0.5%, tartaric acid 1%, metal surface oxidant 1%, oxidation Graphene 0.2%, citric acid 1%, and the balance is water.

[0031] After preparing the treatment solution of this example (pH=1.8), the surface of the cold-rolled sheet is treated, and the steps are as follows:

[0032] (1) Degreasing, water washing, pickling, and secondary water washing are performed on the surface of the cold-rolled sheet;

[0033] (2) Soak the cold-rolled sheet treated in step (1) in the treatment solution for 3 minutes at room temperature;

[0034] (3) The cold-rolled sheet treated in step (2) is washed with water and then dried to complete the surface treatment.

Embodiment 2

[0036] An environment-friendly metal surface treatment liquid based on multifunctional alkyl phosphate ester, the mass percentage of raw materials is as follows: phytic acid 1.2%, zinc oxide 2%, sodium molybdate 0.5%, tartaric acid 2%, metal surface oxidant 1.5%, oxidation Graphene 0.3%, citric acid 2%, and the balance is water.

[0037] After preparing the treatment solution of this example (pH=1.8), the surface of the cold-rolled sheet is treated, and the steps are as follows:

[0038] (1) Degreasing, water washing, pickling, and secondary water washing are performed on the surface of the cold-rolled sheet;

[0039] (2) Soak the cold-rolled sheet treated in step (1) in the treatment solution for 3 minutes at room temperature;

[0040] (3) The cold-rolled sheet treated in step (2) is washed with water and then dried to complete the surface treatment.

Embodiment 3

[0042] An environment-friendly metal surface treatment solution based on polyfunctional alkyl phosphate, the mass percentage of raw materials is as follows: 0.5% pentaerythritol tetraphosphate, 3% zinc oxide, 0.5% sodium molybdate, 3% tartaric acid, 2% metal surface oxidant , graphene oxide 0.3%, citric acid 2%, and the balance is water.

[0043] After preparing the treatment solution of this example (pH=1.8), the surface of the cold-rolled sheet is treated, and the steps are as follows:

[0044] (1) Degreasing, water washing, pickling, and secondary water washing are performed on the surface of the cold-rolled sheet;

[0045] (2) Spray the treatment solution on the surface of the cold-rolled sheet treated in step (1) for 2 minutes at room temperature;

[0046] (3) The cold-rolled sheet treated in step (2) is washed with water and then dried to complete the surface treatment.

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PUM

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Abstract

Provided are environment-friendly universal metal surface pretreatment liquid and a use method. The environment-friendly universal metal surface pretreatment liquid comprises, by weight in percentage, 0.5-1.5 percent of polyfunctional group alkyl phosphate, 2-5 percent of zinc oxide, 0.5-1 percent of sodium molybdate, 1-5 percent of tartaric acid, 1-3 percent of metal surface oxidant, 0.1-0.5 percent of graphene oxide, 1-2 percent of citric acid and the balance water. Due to the fact that the efficient metal surface oxidant is added, the quality of a passivation layer in an original product is greatly improved, and the corrosion resisting performance of a chemical conversion coating is greatly improved. Due to the fact that the graphene oxide is added, the number of active functional groups of an organic adsorption layer is effectively increased, the crosslinking degree of the organic adsorption layer and an outer organic coating is improved, and the adhesive force of a paint film is effectively improved.

Description

technical field [0001] The invention relates to an environment-friendly metal surface treatment liquid with excellent corrosion resistance and strong paint film adhesion and application thereof, belonging to the field of metal surface treatment. Background technique [0002] At present, phosphating solution occupies most of the market in the metal surface treatment industry. After the metal material is phosphating, a dense porous film will be formed on the surface, which can improve the corrosion resistance of the metal material and the bonding force with the outer organic coating. However, the film-forming principle of phosphating film determines that a large amount of phosphating waste residue and waste liquid will be generated during phosphating treatment, which will bring serious environmental pollution problems. In order to meet the requirements of environmental protection and promote the benign development of the metal surface treatment industry, developing an environ...

Claims

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Application Information

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IPC IPC(8): C23C22/40
Inventor 马厚义高翔刘士明周昆仑侯士峰
Owner QINGDAO GERUIXI METAL PROTECTION TECH CO LTD
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