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Army green zinc-coated chrome-free passivator II for bondy pipe

A passivating agent, color technology, applied in the direction of metal material coating process, etc., can solve the problems of non-toxic environmental protection, trivalent chromium toxicity, etc.

Inactive Publication Date: 2014-04-02
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Trivalent chromium passivation agent such as: Bondi tube trivalent chromium military green passivation agent ZL201210147166.7, which is suitable for iron or copper substrates, but trivalent chromium has certain toxicity, so it does not meet the requirements of non-toxic and environmental protection

Method used

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  • Army green zinc-coated chrome-free passivator II for bondy pipe
  • Army green zinc-coated chrome-free passivator II for bondy pipe
  • Army green zinc-coated chrome-free passivator II for bondy pipe

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Embodiment 1

[0018] The specific preparation steps of this embodiment are as follows:

[0019] Sodium molybdate 15g / L, nickel sulfate 25g / L, sodium citrate 10g / L, sodium sulfite 10g / L, oxalic acid 10g / L.

[0020] a. Pour 15g / L sodium molybdate into a small amount of water, stir to fully dissolve;

[0021] b. Slowly add 10g / L sodium citrate and 10g / L sodium sulfite, and stir to fully dissolve;

[0022] c. Pour in 10g / L oxalic acid and stir evenly;

[0023] d. Slowly add 25g / L of nickel sulfate, stir rapidly to make it fully dissolved;

[0024] e. After the calculated amount of water (conductivity < 5us / cm) was made to volume, it was left to stand for 10 minutes, and the pH was adjusted within the range of 2.5 with nitric acid.

[0025] f. Prepare a common low-cyanide zinc plating solution and adjust the pH value for electroplating.

[0026] g. After a certain period of time, take out the sample, and conduct passivation treatment after light exposure in 3% nitric acid, and the passivatio...

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Abstract

The invention relates to an army green zinc-coated chrome-free passivator II for a bondy pipe. The passivator is prepared by dissolving and uniformly mixing materials such as sodium molybdate, sodium citrate, sodium sulfite, oxalic acid and nickel sulfate according to a certain ratio. A passivating film is synthesized, so that the corrosion resistance of a coating is improved; meanwhile, the coating is endowed with the army green passivating film.

Description

technical field [0001] The invention relates to a chrome-free army green passivator II for galvanizing a Bondi tube, in particular to the components, functions and preparation methods of the chrome-free army green passivator for a galvanized Bondi tube. Background technique [0002] Bondi tube refers to a thin steel tube with a diameter of 4.6-10.6mm. It is mainly used in oil pressure gauge pipelines, fuel pipelines, brake pipelines and similar devices in the automobile industry, refrigeration industry, and heater manufacturing industry. It can also be widely used to replace copper pipes and reduce the cost of use. Bondi pipes are It is finished by coiling cold-rolled strip steel sheets, welding, cyanide copper-plating as a base, and copper layer galvanization. Copper plating protects the Bondi tube during use, slows down the corrosion of the substrate, and can help complete welding, so the Bondi tube must be coated with copper or a copper substrate. Because the Bondi tube...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/40
Inventor 石磊
Owner SHANDONG JIANZHU UNIV
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