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A kind of manganese series phosphating solution additive and using method thereof

A manganese-based phosphating solution and additive technology, applied in the direction of metal material coating process, can solve the problems of short service life of phosphating solution, environmental treatment burden, and difficulty in washing, and achieve low cost, reduce sediment, and speed up production. Effect of Membrane Speed

Active Publication Date: 2017-09-26
DALIAN BETRUST ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the common problems of domestic phosphating technology are: high phosphating temperature, short service life of phosphating solution, difficult washing and water pollution, which not only bring burden to environmental governance but also consume a lot of water, phosphate and other resources

Method used

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  • A kind of manganese series phosphating solution additive and using method thereof
  • A kind of manganese series phosphating solution additive and using method thereof
  • A kind of manganese series phosphating solution additive and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) The components of manganese phosphating solution additives are:

[0015]

[0016]

[0017] The degree of substitution of starch phosphate monoester is 0.12. The starch phosphate monoester can be purchased from the market, or can be prepared by cross-linking starch and phosphating film according to actual needs. When phosphoric acid reacts with three hydroxyl groups in starch, starch phosphate monoester is formed. .

[0018] (2) Preparation of phosphating solution:

[0019] First, stir the main salt of the phosphating solution with water, add nitric acid or phosphoric acid to dissolve, then add appropriate amount of manganese dihydrogen phosphate, sodium fluorosilicate, citric acid, tartaric acid, HEDP, starch phosphate monoester, gluconic acid and polyethylene Alcohol, add while stirring until completely dissolved, adjust the pH value to 2-4.

[0020] (3) Surface treatment:

[0021] Put the metal after degreasing, water washing, rust removal and surface con...

Embodiment 2

[0023] (1) The components of manganese phosphating solution additives are:

[0024]

[0025] (2) Preparation of phosphating solution:

[0026] First, stir the main salt of the phosphating solution with water, add nitric acid or phosphoric acid to dissolve, then add appropriate amount of manganese dihydrogen phosphate, sodium fluorosilicate, citric acid, tartaric acid, HEDP, starch phosphate monoester, gluconic acid and polyethylene Alcohol, add while stirring until completely dissolved, adjust the pH value to 2-4.

[0027] (3) Surface treatment:

[0028] Put the metal after degreasing, water washing, rust removal and surface conditioning into the phosphating solution in step (2), and phosphating at 35-45°C for 6-8 minutes to form a uniform black manganese-based phosphating film .

Embodiment 3

[0030] (1) The components of manganese phosphating solution additives are:

[0031]

[0032] (2) Preparation of phosphating solution:

[0033] First, stir the main salt of the phosphating solution with water, add nitric acid or phosphoric acid to dissolve, then add appropriate amount of manganese dihydrogen phosphate, sodium fluorosilicate, citric acid, tartaric acid, HEDP, starch phosphate monoester, gluconic acid and polyethylene Alcohol, add while stirring until completely dissolved, adjust the pH value to 2-4.

[0034] (3) Surface treatment:

[0035] Put the metal after degreasing, water washing, rust removal and surface conditioning into the phosphating solution in step (2), and phosphating at 35-45°C for 6-8 minutes to form a uniform black manganese-based phosphating film .

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Abstract

The invention provides a manganese-based phosphating solution additive and a using method thereof, belonging to the field of industrial phosphating solutions. The additives include manganese dihydrogen phosphate, sodium fluorosilicate, tartaric acid, citric acid, HEDP, polyvinyl alcohol, starch phosphate monoester and gluconic acid; the degree of substitution of the starch phosphate monoester is 0.12. Compared with the prior art, the manganese-based phosphating solution additive of the present invention has the advantages of using tartaric acid instead of nitrite and cooperating with fluorosilicate to accelerate the film-forming speed; organic carboxylate is complexed with metal cations to make The crystal grains are refined, and the phosphating solution sediment is reduced at the same time to ensure the quality of the phosphating film. Coating adhesion; the additive has a wide application range, low cost, convenient use, energy saving and environmental protection, and is beneficial to industrial production.

Description

technical field [0001] The invention belongs to the field of industrial phosphating solutions, and in particular relates to a manganese-based phosphating solution additive and a use method thereof. Background technique [0002] As one of the core technologies of pre-painting treatment, phosphating is widely used in industries such as automobiles, household appliances, machinery, and military industry. The adhesion, corrosion resistance and protective performance of the coating can be significantly improved by adding certain additives to the phosphating solution. [0003] At present, the common problems of domestic phosphating technology are: high phosphating temperature, short service life of phosphating solution, difficult washing and water pollution, which not only bring burden to environmental governance but also consume a lot of water, phosphate and other resources . Therefore, the development direction of phosphating technology is mainly to improve quality and reduce ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/36
Inventor 邓春阳唐洪林
Owner DALIAN BETRUST ENVIRONMENTAL PROTECTION TECH CO LTD
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