Blue-white passivation solution with high corrosion resistance and application method of blue-white passivation solution

A passivation solution and performance technology, applied in the field of blue-white passivation solution, can solve the problems of poor corrosion resistance of passivation film, low lifespan of passivation solution, unstable product quality, etc., to save energy, ensure stability, use The method is safe and controllable

Inactive Publication Date: 2018-07-03
ZHEJIANG KANGSHENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing blue-white passivation process has defects such as unstable product quality, short passivation solution life, difficult to control the passivation process, and poor corrosion resistance of the passivation film.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A blue-white passivation solution with high corrosion resistance, comprising the following substances by weight: 3-7 parts of iron, 11-15 parts of phosphoric acid, 7-11 parts of citric acid monohydrate, 10 parts of zinc citrate dihydrate -14 parts, 3-7 parts of cobalt sulfate heptahydrate, 0.1-1 part of surfactant, 35-55 parts of water.

[0043] The blue-white passivation solution with high anticorrosion performance includes the following substances by weight: 4-6 parts of iron, 12-14 parts of phosphoric acid, 8-10 parts of citric acid monohydrate, 11-13 parts of zinc citrate dihydrate 4-6 parts, 4-6 parts of cobalt sulfate heptahydrate, 0.3-0.7 parts of surfactant, 40-50 parts of water.

[0044] The blue-white passivation solution with high anticorrosion performance includes the following materials by weight: 5 parts of iron, 13 parts of phosphoric acid, 9 parts of citric acid monohydrate, 12 parts of zinc citrate dihydrate, 5 parts of cobalt sulfate heptahydrate , 0....

Embodiment 2

[0075] A kind of blue-white passivation liquid with high anticorrosion property, by weight, comprises following material: 3 parts of iron agent, 11 parts of phosphoric acid, 7 parts of citric acid monohydrate, 10 parts of zinc citrate dihydrate, cobalt sulfate heptahydrate 3 parts, 0.1 part of surfactant, 35 parts of water.

[0076] The iron agent is chromium trioxide.

[0077] The phosphoric acid concentration is 85%.

[0078] Described surfactant is carnauba wax emulsifier.

[0079] A method for configuring a blue-white passivation solution with high anticorrosion performance, comprising steps:

[0080] A. Prepare materials, prepare raw materials according to the formula;

[0081] B. Prepare water, add 1 / 3 of the water required by the formula into the reactor, open the reactor, and stir at a rate of 20Hz;

[0082] C. add iron, in the reactor, add required iron agent, obtain product c;

[0083] D. add acid, in the reactor, add required phosphoric acid, obtain product d; ...

Embodiment 3

[0106] A kind of blue-white passivation liquid with high anticorrosion property, by weight, comprises following material: 7 parts of iron agent, 15 parts of phosphoric acid, 11 parts of citric acid monohydrate, 14 parts of zinc citrate dihydrate, cobalt sulfate heptahydrate 7 parts, 1 part of surfactant, 55 parts of water.

[0107] The iron agent is chromium trioxide.

[0108] The phosphoric acid concentration is 85%.

[0109] Described surfactant is carnauba wax emulsifier.

[0110] A method for configuring a blue-white passivation solution with high anticorrosion performance, comprising steps:

[0111] A. Prepare materials, prepare raw materials according to the formula;

[0112] B. Prepare water, add 1 / 3 of the water required by the formula into the reactor, open the reactor, and stir at a rate of 20Hz;

[0113] C. add iron, in the reactor, add required iron agent, obtain product c;

[0114] D. add acid, in the reactor, add required phosphoric acid, obtain product d; ...

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PUM

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Abstract

The invention discloses a blue-white passivation solution with high corrosion resistance. The blue-white passivation solution comprises, by weight, 3-7 parts of chalybeate, 11-15 parts of phosphoric acid, 7-11 parts of citric acid monohydrate, 10-14 parts of zinc citrate dehydrate, 3-7 parts of cobalt sulfate heptahydrate, 0.1-1 part of a surface active agent and 35-55 parts of water. Through theformula of the blue-white passivation solution, parameters such as the passivation concentration, the PH value and time are controlled, a passivation film stable in performance and excellent in corrosion resistance can be obtained, the ROHS standard is completely met, and during galvanization surface neutral salt spray resisting testing, the time for white rust is 96 h, and the time for red rust is 240 h or above.

Description

technical field [0001] The invention relates to the field of metal passivation, in particular to a blue-white passivation solution with high anticorrosion performance and a use method thereof. Background technique [0002] Steel parts are usually passivated after electro-galvanizing or hot-dip galvanizing to prevent white rust in a short time. The blue-white passivation process can form a blue-white passivation film on the galvanized layer, which is not only beautiful but also has excellent anti-corrosion effect. [0003] However, the existing blue-white passivation process has defects such as unstable product quality, short passivation solution life, difficult control of the passivation process, and poor corrosion resistance of the passivation film. Contents of the invention [0004] The object of the present invention is to provide a blue-white passivation solution with high anticorrosion performance and its application method. The invention is a trivalent chromium pas...

Claims

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Application Information

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IPC IPC(8): C23C22/17
CPCC23C22/17
Inventor 占利华滕世政石新年薛晓伟
Owner ZHEJIANG KANGSHENG CO LTD
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