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 an

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] An environmentally friendly metal surface treatment liquid based on multi -energy -based alkyl phosphate. The quality of the raw materials is as follows: 1%: zinc oxide 2%, sodium molybdenum acid, 0.5%of sodium molybdenum, 1%metal surface oxidant, 1%oxidation, oxidation, oxidation, oxidation, oxidation, oxidation, oxidation, oxidation, oxidation, Grapstine is 0.2%, 1%of citric acid, and the remaining amount is water.

[0031] After the processing liquid of this embodiment is prepared (pH = 1.8), the surface of the cold rolled plate is processed. The steps are as follows:

[0032] (1) Remove oil on the surface of the cold rolled plate, wash, pickle, secondary water washing;

[0033] (2) Steps at normal temperature (1) The cold -rolled plates after treatment are soaked in the treatment solution for 3 minutes;

[0034] (3) Wash the steps (2) the cold -rolled plates after treatment, and dry it, that is, complete the surface treatment.

Example Embodiment

[0035] Example 2

[0036] An environmentally friendly metal surface treatment liquid based on multi -energy -based alkyl phosphate. The quality of the raw materials is as follows: 1.2%, 2%zinc oxide, 0.5%sodium molybdenonate, 2%of alcoholic acid, 1.5%of the metal surface oxidant, oxidation Graphene is 0.3%, 2%of citric acid, and the balance is water.

[0037] After the processing liquid of this embodiment is prepared (pH = 1.8), the surface of the cold rolled plate is processed. The steps are as follows:

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

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

[0040] (3) Washing and drying the cold-rolled sheet treated in step (2), the surface treatment is completed.

Example Embodiment

[0041] Example 3

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

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

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

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

[0046] (3) Washing and drying the cold-rolled sheet treated in step (2), the surface treatment is completed.

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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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