Neutral multifunctional steel surface treating agent and preparation method

A steel surface, multi-functional technology, applied in the direction of metal material coating process, etc., can solve the problems of waste acid treatment, corrosion damage the ground, affect the health of operators, etc., and achieve the effect of safe and convenient use

Active Publication Date: 2012-09-19
DALIAN JIESHI CLEANING PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing treatment solution is acidic, and when the steel surface is repeatedly brushed and wiped, it will produce H 2 The stench of S not only pollutes the air environment, but also seriously affects the health of the operator; soaking treatment will produce sediment and sludge in the treatment liquid tank, and the problem of waste acid treatment will occur during cleaning, increasing the use of treatment liquid Cost; the treatment liquid will also flow from the steel surface to the ground during spraying treatment, and there is a problem of serious corrosion and damage to the ground

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Raw materials and mass percentages are as follows: organic acid 12-43%, catalyst 0.2-4%, polyvalent nitrogen compound 12-43%, inhibitor 0.01-3%, film-forming agent 0.5-5%, surfactant 0.5-4% and water balance.

[0022] The organic acid is at least one of gluconic acid, organic phosphonic acid, citric acid, lauric acid, nitrilotriacetic acid, malic acid, tartaric acid, salicylic acid, acrylic acid and naphthenic acid.

[0023] The catalyst is at least one of aluminum hydroxide, lithium hydroxide, lanthanum hydroxide, potassium hydroxide, calcium hydroxide, ammonium hydroxide and barium hydroxide.

[0024] The polyvalent nitrogen compound is at least one of triethanolamine and urea.

[0025] The inhibitor is molybdate.

[0026] The film former is zinc phosphate.

[0027] The surfactant is n-SAA.

[0028] Each raw material can be selected within the mass range, so that the sum of the mass is 100%, but the pH value is 6-7.

[0029] The preparation method is carried out ...

Embodiment 2

[0031] The raw materials and mass percentages are as follows: citric acid and nitrilotriacetic acid mixture 12 to 43%, barium hydroxide and potassium hydroxide mixture 0.2 to 4%, triethanolamine and urea mixture 12 to 43%, molybdate 0.01 to 3% , zinc phosphate 0.5 ~ 5%, n-SAA surfactant 0.5 ~ 4% and water balance.

[0032] The neutral multi-functional steel surface treatment agent of Examples 1 and 2 of the present invention can reach GB / T12612-2006 by immersing floating rust, light rust and medium rust steel workpieces for 1-4 hours. The treated workpiece does not need to be rinsed, and it can be welded and painted after drying, and the adhesion to the painted object reaches the first grade.

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PUM

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Abstract

The invention discloses a neutral multifunctional steel surface treating agent, which does not generate waste acid, is environmental-friendly, and comprises the following raw materials in percentage by mass: 12-43 percent of organic acid, 0.2-4 percent of catalyst, 12-43 percent of multivalent nitrogen compound, 0.01-3 percent of inhibitor, 0.5-5 percent of film-forming agent, 0.5-4 percent of surface active agent, and the balance water. A preparation method comprises the following steps of: adding the catalyst, the multivalent nitrogen compound and the water with calculated quantity into the organic acid; starting to stir and heating in a reaction kettle, wherein the temperature is controlled to be 80-120 DEG C, and the reaction time is 2-4h; generating amide through a reaction product, wherein the amide is not acid and has a pH value being 6-7; adding the inhibitor, the film-forming agent and the surface active agent; and uniformly stirring.

Description

technical field [0001] The invention belongs to the field of fine chemicals, in particular to an environment-friendly neutral multifunctional steel surface treatment agent and a preparation method thereof, which do not produce waste acid. technical background [0002] At present, a multifunctional steel surface treatment solution (general technical standard is GB / T12612-2006) is commonly used in the machinery manufacturing equipment industry. It uses water as a carrier and contains phosphoric acid and organic acids (rust removers), surfactants ( Degreasing and degreasing agent), zinc salt (film forming agent) and accelerator, corrosion inhibitor, etc., can achieve degreasing, derusting and phosphating by brushing, immersing, spraying and other treatments on the steel surface , anti-rust and passivation purposes. However, the existing treatment solution is acidic, and when the steel surface is repeatedly brushed and wiped, it will produce H 2 The stench of S not only pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/68C23G1/24
Inventor 陈杰李秋梅陈智博
Owner DALIAN JIESHI CLEANING PRODS
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