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Phosphorus-free graphene-oxide-containing metal surface pretreatment solution and application method thereof

A metal surface and treatment liquid technology, applied in the direction of metal material coating process, etc., can solve a large number of phosphating waste residues, environmental problems, restrictions on the use of phosphating solution, etc., to reduce health hazards, reduce environmental costs, and alleviate heavy metal pollution Effect

Active Publication Date: 2015-10-07
QINGDAO GERUIXI METAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the phosphating solution widely used in the metal surface pretreatment industry contains a large amount of heavy metals, and a large amount of phosphating waste residue will be generated during use, causing serious environmental problems. Therefore, the use of phosphating solution has become more and more popular. strict restrictions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of phosphorus-free environment-friendly metal surface treatment liquid that has added graphene oxide, raw material mass percent is as follows:

[0024] Fluosilicic acid 1%, sodium molybdate 0.5%, sodium nitrate 1%, sodium chlorate 1.0%, edetate disodium 1%, tartaric acid 0.8%, graphene oxide 0.1%, and the balance is water.

[0025] 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:

[0026] (1) Degreasing, water washing, pickling, and secondary water washing are performed on the surface of the cold-rolled sheet;

[0027] (2) Soak the cold-rolled sheet treated in step (1) in the treatment solution for 5 minutes at room temperature;

[0028] (3) The cold-rolled sheet treated in step (2) is washed with water and then dried to complete the surface treatment.

Embodiment 2

[0030] A kind of phosphorus-free environment-friendly metal surface treatment liquid that has added graphene oxide, raw material mass percent is as follows:

[0031] Fluosilicic acid 1.5%, sodium molybdate 0.2%, sodium nitrate 1.2%, sodium m-nitrobenzene sulfonate 1.2%, disodium edetate 1.3%, tartaric acid 1.0%, graphene oxide 0.2%, the balance is water.

[0032] 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:

[0033] (1) Degreasing, water washing, pickling, and secondary water washing are performed on the surface of the cold-rolled sheet;

[0034] (2) Soak the cold-rolled sheet treated in step (1) in the treatment solution for 4 minutes at room temperature;

[0035] (3) The cold-rolled sheet treated in step (2) is washed with water and then dried to complete the surface treatment.

Embodiment 3

[0037] A kind of, phosphorus-free environment-friendly metal surface treatment liquid that has added graphene oxide, the mass percent of raw material is as follows:

[0038] Fluosilicic acid 2%, sodium molybdate 0.8%, sodium nitrate 1.6%, sodium chlorate 0.6%, edetate disodium 1.7%, tartaric acid 1.5%, graphene oxide 0.2%, and the balance is water.

[0039] 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:

[0040] (1) Degreasing, water washing, pickling, and secondary water washing are performed on the surface of the cold-rolled sheet;

[0041] (2) Spray the cold-rolled sheet treated in step (1) in the treatment solution for 3 minutes at room temperature;

[0042] (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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Abstract

The invention provides a phosphorus-free graphene-oxide-containing metal surface pretreatment solution and an application method thereof. The phosphorus-free graphene-oxide-containing metal surface pretreatment solution comprises the following components in percentage by weight: 1-2% of fluosilicic acid, 0.2-1% of sodium molybdate, 1-2% of sodium nitrate, 0.6-1.2% of metal surface oxidizer, 1-2% of disodium edetate, 0.8-1.5% of tartaric acid, 0.1-0.3% of graphene oxide and the balance of water, totaling 100%. The product has the advantages of stable and excellent properties and wide application range. The added graphene oxide can effectively enhance the paint film adhesion of the conversion coating.

Description

technical field [0001] The invention discloses a phosphorus-free and environment-friendly metal surface treatment liquid added with graphene oxide, which belongs to the field of metal surface pretreatment. Background technique [0002] Today, steel and other metal materials are widely used in industries related to the national economy and people's livelihood, such as security doors, mechanical processing, automobiles, and ships, and metal pretreatment is an indispensable process in the metal processing process. At present, the phosphating solution widely used in the metal surface pretreatment industry contains a large amount of heavy metals, and a large amount of phosphating waste residue will be generated during use, causing serious environmental problems. Therefore, the use of phosphating solution has become more and more popular. strict restrictions. As the society pays more attention to environmental protection, the metal pretreatment industry will have an increasing de...

Claims

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Application Information

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IPC IPC(8): C23C22/44
Inventor 马厚义高翔
Owner QINGDAO GERUIXI METAL PROTECTION TECH CO LTD
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