Zinc-system phosphating solution additive and use method thereof

A zinc-based phosphating solution and additive technology, which is applied in the direction of metal material coating process, etc., can solve the problems of short service life of phosphating solution, environmental treatment burden, and difficulty in washing, and achieves low cost, reduced slag, and film formation. fast effect

Active Publication Date: 2015-10-07
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, di

Method used

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  • Zinc-system phosphating solution additive and use method thereof
  • Zinc-system phosphating solution additive and use method thereof
  • Zinc-system phosphating solution additive and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) The components of zinc phosphating solution additives are:

[0018]

[0019] (2) Preparation of phosphating solution:

[0020] First, stir the main salt of the phosphating solution with water, add nitric acid or phosphoric acid to dissolve, then add appropriate amount of zinc nitrite, H 2 o 2 , NaClO 3 Stir while adding, then add tartrate, guanidine nitrate and nitrobenzene sulfonate in turn, wait for the temperature of the phosphating solution to drop to room temperature, add organic carboxylate, sodium lauryl iminodipropionate and zinc dihydrogen phosphate, Stir until completely dissolved, and adjust the pH to 2-4.

[0021] (3) Surface treatment:

[0022] 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 gray zinc-based phosphating film .

Embodiment 2

[0024] (1) The components of zinc phosphating solution additives are:

[0025]

[0026]

[0027] (2) Preparation of phosphating solution:

[0028] First, stir the main salt of the phosphating solution with water, add nitric acid or phosphoric acid to dissolve, then add appropriate amount of zinc nitrite, H 2 o 2 , NaClO 3 Stir while adding, then add tartrate, guanidine nitrate and nitrobenzene sulfonate in turn, wait for the temperature of the phosphating solution to drop to room temperature, add organic carboxylate, sodium lauryl iminodipropionate and zinc dihydrogen phosphate, Stir until completely dissolved, and adjust the pH to 2-4.

[0029] (3) Surface treatment:

[0030] 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 gray zinc-based phosphating film .

Embodiment 3

[0032] (1) The components of zinc phosphating solution additives are:

[0033]

[0034] (2) Preparation of phosphating solution:

[0035] First, stir the main salt of the phosphating solution with water, add nitric acid or phosphoric acid to dissolve, then add appropriate amount of zinc nitrite, H 2 o 2 , NaClO 3 Stir while adding, then add tartrate, guanidine nitrate and nitrobenzene sulfonate in turn, wait for the temperature of the phosphating solution to drop to room temperature, add organic carboxylate, sodium lauryl iminodipropionate and zinc dihydrogen phosphate, Stir until completely dissolved, and adjust the pH to 2-4.

[0036] (3) Surface treatment:

[0037] 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 gray zinc-based phosphating film .

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Abstract

The invention provides a zinc-system phosphating solution additive and a use method thereof and belongs to the field of industrial phosphating solution. The zinc-system phosphating solution additive comprises an inorganic promoter, an organic promoter, ligand, a buffering agent and a surface active agent, wherein the inorganic promoter is zinc nitrite, NaClO3 and H2O2; the organic promoter is tartrate, guanidine nitrate and nitrobenzene sulfonate; the ligand is organic carboxylate; and the surface active agent is sodium lauriminodipropionate and zinc dihydrogen phosphate. The zinc-system phosphating solution additive is suitable for preparing low-temperature phosphating solution; and due to matching use of the organic promoter and the inorganic promoter, the film-forming speed is fast; due to complexing of the ligand and metal cations, the crystalline grain is refined, simultaneously the deposited slag of the phosphating solution is reduced, the quality of the phosphating film is guaranteed, and the film layer is uniform and fine; due to the buffering agent and the surface active agent, the phosphating solution has better corrosion resistance, and the adhesive force between all metal parts and a coating layer is enhanced. The additive is wide in application range, low in cost and convenient in use, is energy-saving and environmental-friendly, 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 zinc-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 pollu...

Claims

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Application Information

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IPC IPC(8): C23C22/16
Inventor 唐洪林邓春阳
Owner DALIAN BETRUST ENVIRONMENTAL PROTECTION TECH CO LTD
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