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Steel surface normal temperature blackening passivator

A technology of steel surface and passivation agent, which is applied in the coating process of metal materials, etc., and can solve the problems of poor corrosion resistance of the blackened layer

Inactive Publication Date: 2017-07-21
武汉迪赛新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the problem of poor corrosion resistance of the blackened layer in the current method of blackening the steel surface at room temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Raw materials include 0.5g of copper sulfate, 0.2g of tartaric acid (complexing stabilizer), 1.0g of selenium dioxide, 20g of cerium nitrate, 10g of phosphate (a mixture of dihydrogen salt and monohydrogen salt with a molar ratio of 1:2), phosphomolybdenum Ammonium acid 10g, nickel sulfate 0.2g, sodium dodecylsulfonate 0.2g (wetting agent).

[0018] When preparing, first dissolve the copper salt in 200ml of deionized water, then add a complexation stabilizer, stir and mix, and then add the selenide to dissolve. As solution A; dissolve the wetting agent in 500ml deionized water, then add the rare earth compound and phosphomolybdate to stir and dissolve, as solution B; Dissolve in 300ml of deionized water, then add the nickel salt, stir to dissolve, as solution C.

[0019] Slowly add solution A to solution C under stirring condition and mix evenly, continue to add solution B under stirring condition, and stir for 5-10 minutes to obtain the blackening passivator for steel...

Embodiment 2

[0021] Copper sulfate 2.0g, tartaric acid 1.0g, selenium dioxide 2.0g, cerium nitrate 5.0g, phosphate (a mixture of dihydrogen salt and monohydrogen salt with a molar ratio of 1:1) 25g, potassium phosphomolybdate 40g, nickel sulfate 1.0 g, OP-10 1.0g (wetting agent).

[0022] When preparing, first dissolve the copper salt in 200ml of deionized water, then add a complexation stabilizer, stir and mix, and then add the selenide to dissolve. As solution A; dissolve the wetting agent in 500ml deionized water, then add the rare earth compound and phosphomolybdate to stir and dissolve, as solution B; mix the dihydrogen phosphate and monohydrogen phosphate according to the described The molar ratio was dissolved in 300ml deionized water, and then the nickel salt was added, stirred and dissolved, as solution C.

[0023] Slowly add solution A to solution C under stirring condition and mix evenly, continue to add solution B under stirring condition, and stir for 5-10 minutes to obtain t...

Embodiment 3

[0025] Copper nitrate 1.0g, citric acid 0.5g, selenous acid 2.0g, cerium nitrate 25g, phosphate (a mixture of dihydrogen salt and monohydrogen salt with a molar ratio of 1:2) 30g, sodium phosphomolybdate 20g, nickel nitrate 2.0 g, sodium lauryl sulfate 2.0g.

[0026] When preparing, first dissolve the copper salt in 200ml of deionized water, then add a complexation stabilizer, stir and mix, and then add the selenide to dissolve. As solution A; dissolve the wetting agent in 500ml deionized water, then add the rare earth compound and phosphomolybdate to stir and dissolve, as solution B; mix the dihydrogen phosphate and monohydrogen phosphate according to the described The molar ratio was dissolved in 300ml deionized water, and then the nickel salt was added, stirred and dissolved, as solution C.

[0027] Slowly add solution A to solution C under stirring condition and mix evenly, continue to add solution B under stirring condition, and stir for 5-10 minutes to obtain the blacke...

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PUM

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Abstract

The invention relates to steel surface normal temperature blackening passivator and belongs to the technical field of metal surface treatment. The passivator is aqueous solution composed of the following components of 0.5-3.5 g / L of copper salt, 0.5-5.0 g / L of selenide, 5-25 g / L of cerium salt, 10-40 g / L of phosphomolybdate, 10-35g g / L of phosphate buffer solution, 0.2-2.5 g / L of nickel salt, 0.2-5.0 g / L of complexing stabilizer, and 0.2-5.0 g / L of wetting agent. The novel normal temperature blackening agent is provided by the invention, the novel normal temperature blackening agent combines normal temperature blackening and passivation treatment into one and simplifies normal temperature blackening technology, and the effects of the novel normal temperature blackening agent and the repassivation technology after normal temperature blackening are equivalent.

Description

technical field [0001] The invention specifically relates to a material for steel surface blackening treatment to enhance the corrosion resistance and decorative properties of steel, in particular to a normal temperature blackening passivator for steel surface, which belongs to the technical field of metal surface treatment. Background technique [0002] The blackening and passivation treatment of the steel surface is to oxidize the steel surface to enhance the corrosion resistance and decoration of the steel surface. The traditional blackening process is a high-temperature alkaline blackening process, that is, sodium nitrite alkaline blackening process. The process requires immersing the steel in an alkaline blackening agent containing sodium nitrite and subjecting it to a high temperature treatment above 140°C for 30-90 minutes. The production cycle is long, the energy consumption is high, and sodium nitrite is harmful to human health and is a recognized carcinogen. There...

Claims

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Application Information

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IPC IPC(8): C23C22/42
CPCC23C22/42
Inventor 陈高清
Owner 武汉迪赛新材料有限公司
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