Efficient and environment-friendly chromate-free passivation solution and preparation method thereof

A chromium-free passivation, environmental protection technology, applied in the field of passivation, to achieve the effect of broad development and application prospects, high-efficiency anti-corrosion performance, and simple preparation method

Inactive Publication Date: 2016-01-20
CHANGSHU FENGFAN POWER EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is to provide an efficient and environment-friendly chromium-free passivati

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0022] A highly efficient and environmentally friendly chromium-free passivation solution, including the following components: molybdenum phosphate 35g / L, sodium vanadate 10g / L, sodium tungstate 8g / L, phytic acid 10g / L, tartaric acid 30g / L, tannic acid 50g / L, polytrimethylethoxy modified epoxy resin 10g / L, corrosion and scale inhibitor 6g / L, sealing agent 3g / L, film forming agent 10g / L, antioxidant additive 0.5g / L L, aluminum tripolyphosphate 3g / L; wherein, the molybdophosphate is a mixture of sodium molybdophosphate and molybdophosphoric acid with a mass ratio of 1:2; the film-forming agent is sodium silicate, sodium fluorosilicate and sulfuric acid A mixture of sodium in a mass ratio of 2:1:1; the sealing agent is orthosilicic acid; the antioxidant additive is p-, p-diisooctyldiphenylamine and mineral oil in a ratio of 1:1 Mixed mixture.

[0023] The preparation method steps of above-mentioned efficient environment-friendly chromium-free passivation solution are as follows:...

Embodiment 2

[0029] A highly efficient and environmentally friendly chromium-free passivation solution, including the following components: molybdenum phosphate 40g / L, sodium vanadate 20g / L, sodium tungstate 12g / L, phytic acid 100g / L, tartaric acid 3g / L, tannic acid 5g / L, polytrimethylethoxy modified epoxy resin 50g / L, corrosion and scale inhibitor 8g / L, sealing agent 6g / L, film forming agent 15g / L, antioxidant additive 3g / L , aluminum tripolyphosphate 7g / L; wherein, the molybdophosphate is a mixture of sodium molybdophosphate and molybdophosphoric acid with a mass ratio of 1:3; the film-forming agent is sodium silicate, sodium fluorosilicate and sodium sulfate A mixture mixed at a mass ratio of 3:2:1; the sealing agent is orthosilicic acid; the antioxidant additive is p-, p-diisooctyldiphenylamine and mineral oil mixed at a ratio of 1:1 mixture.

[0030] The preparation method steps of above-mentioned efficient environment-friendly chromium-free passivation solution are as follows:

[0...

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PUM

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Abstract

The invention discloses an efficient and environment-friendly chromate-free passivation solution and a preparation method thereof. The efficient and environment-friendly chromate-free passivation solution comprises the following components of 35-40 g/L of molybdenum phosphate, 10-20 g/L of sodium vanadate, 8-12 g/L of sodium tungstate, 10-100 g/L of phytic acid, 3-30 g/L of tartaric acid, 5-50 g/L of gallotannic acid, 10-50 g/L of poly trimethyl ethyoxyl modified epoxy resin, 6-8 g/L of corrosion and scale inhibitor, 3-6 g/L of sealant, 10-15 g/L of film-forming agent, 0.5-3 g/L of anti-oxidant or oxidation inhibiter and 3-7 g/L of aluminium triphosphate. Through reasonable formula design, the passivation solution contains no chromium ions of any valence state, and has the characteristics of safety and environment friendliness, meanwhile, the passivation solution has the excellent passivation performance, film forming performance and rust resistance, and comprehensive and efficient corrosion resistance is given to a zinc coating. The characteristic of the low cost is achieved from the formula technology to the preparation technology, and the development and application prospects are wide.

Description

technical field [0001] The invention relates to the technical field of passivation, in particular to an efficient and environment-friendly chromium-free passivation solution and a preparation method thereof. Background technique [0002] Galvanized steel sheets are widely used in fields such as construction, home appliances and automobiles. The metal zinc electrode has a low potential and acts as an anode to electrochemically protect the steel substrate when corrosion occurs in a humid environment. However, the zinc layer can only provide reliable protection for the steel substrate in dry and non-corrosive atmosphere conditions. Under actual storage and use conditions, condensation will occur on the surface of the zinc layer, causing rust or discoloration. Therefore, the galvanized layer must be passivated to improve its corrosion resistance. [0003] The use of chromate passivation is a common method for passivation of galvanized sheets, which has the characteristics of ...

Claims

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Application Information

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IPC IPC(8): C23C22/42
Inventor 赵月华尤为
Owner CHANGSHU FENGFAN POWER EQUIP
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