Novel environmentally-friendly passivating agent

A passivating agent, an environmentally friendly technology, applied in the coating process of metal materials, etc., to achieve the effect of solving water-hanging corrosion and simple preparation

Inactive Publication Date: 2013-05-15
佛山市中国地质大学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new type of environmentally friendly passivator that can quickly passivate the surface of steel parts without causing environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Sodium silicate 30g / L,

[0021] Phosphate 10g / L

[0022] Accelerator 5 g / L

[0023] Surfactant 0.5 g / L

[0024] The mass ratio of the silicate to the phosphate is 3:1,

[0025] The accelerator is potassium chlorate,

[0026] Described tensio-active agent is made of OP-10, TX-100 and NP-5, and wherein, the weight part of OP-10 is 1.8, and the weight part of TX-100 is 0.8, and the weight part of NP-5 is 0.8,

[0027] The mixture was finally adjusted to pH 3 with phosphoric acid.

[0028] The steel is passivated by dipping or spraying, and the passivated steel parts have good corrosion resistance whether they are blown dry or dried at 200°C.

[0029] Embodiment two:

Embodiment 2

[0031] Sodium silicate 35g / L,

[0032] Phosphate 15g / L

[0033] Accelerator 7 g / L

[0034] Surfactant 0.7 g / L

[0035] The mass ratio of the silicate to the phosphate is 2.5:1,

[0036] The accelerator is potassium chlorate,

[0037] Described surfactant is made of OP-10, TX-100 and NP-5, and wherein, the weight part of OP-10 is 2, and the weight part of TX-100 is 1, and the weight part of NP-5 is 1,

[0038] The mixture was finally adjusted to pH 4 with phosphoric acid.

[0039] The steel is passivated by dipping or spraying, and the passivated steel parts have good corrosion resistance whether they are blown dry or dried at 200°C.

[0040] Embodiment three:

Embodiment 3

[0042] Sodium silicate 40g / L,

[0043] Phosphate 20g / L

[0044] Accelerator 10 g / L

[0045] Surfactant 1 g / L

[0046] The mass ratio of the silicate to the phosphate is 2:1,

[0047] The accelerator is potassium chlorate,

[0048] Described tensio-active agent is made of OP-10, TX-100 and NP-5, and wherein, the weight part of OP-10 is 2.2, and the weight part of TX-100 is 1.2, and the weight part of NP-5 is 1.2,

[0049] The mixture was finally adjusted to pH 5 with phosphoric acid.

[0050] The steel is passivated by dipping or spraying, and the passivated steel parts have good corrosion resistance whether they are blown dry or dried at 200°C.

[0051] Embodiment four:

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PUM

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Abstract

The invention discloses a novel environmentally-friendly passivating agent, which is characterized by comprising 30 to 40 g/L of sodium silicate, 10 to 20 g/L of phosphate, 5 to 10 g/L of accelerant and 0.5 to 1 g/L of surfactant, wherein the mass ratio of the silicate to the phosphate is 2-3: 1; the accelerant is potassium chlorate; the surfactant consists of 1.8 to 2.2 weight parts of OP-10, 0.8 to 1.2 weight parts of TX-100 and 0.8 to 1.2 weight parts of NP-5; and the pH value of the mixed solution is adjusted to be between 3 and 5 by using phosphoric acid. Compared with the prior art, thepassivating agent quickly passivates the surfaces of steel parts, and does not cause environmental pollution and the like.

Description

technical field [0001] The invention relates to a passivating agent for rapid passivation of steel. Background technique [0002] Corrosion of steel materials occurs all the time. According to statistics, 10% of steel materials cannot be recycled due to corrosion every year. In order to prevent corrosion and reduce the huge losses caused by corrosion of steel materials, various anti-corrosion methods must be adopted, and passivation treatment of steel surfaces is one of the means. At present, there are roughly three types of passivation agents used for steel passivation treatment: chromate, molybdate and organic passivation agent. The use of chromate as a passivator is low in cost, easy to use, and good in corrosion resistance, but it is highly toxic and easy to cause cancer, and it will cause great pollution to the environment after being discharged. Use is strictly limited. Organic passivators are more expensive, and emit various pungent odors. Long-term exposure has ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/07
Inventor 皮振邦
Owner 佛山市中国地质大学研究院
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