High-adhesion selenium-free normal temperature blackening liquid

A technology with adhesion and normal temperature, which is applied in the coating process of metal materials, etc., can solve the problems of human body and environment hazards, loose blackened film, low adhesion, etc., and achieve the effect of avoiding precipitation, increasing gloss and improving adhesion

Active Publication Date: 2017-11-21
平湖瑞星金属工艺有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention is that the conventional blackening liquid at room temperature is a copper-selenium blackening system, and the resulting blackening film is loose and has low adhesion, and more precipitates are formed during the blackening process, and the working liquid contains toxic substances. Selenium element, the waste liquid and waste residue produced will be harmful to the human body and the environment, providing a high-adhesion selenium-free room temperature blackening liquid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Weigh 500g Dipsacus, 800g Cynomorium and 500g Psoraleae and put them into a Chinese medicine pulverizer to pulverize for 30min to obtain a mixed Chinese medicine powder, mix the mixed Chinese medicine powder and water in a mass ratio of 1:2 and put it into a fermenter, then Add 180g of grape skins into the fermenter, stir evenly with a stirring rod, seal the fermenter, and ferment at 45°C for 15 days; In a sterilizing tank, sterilize at 120°C for 15 minutes to obtain a sterilized fermented liquid. In parts by weight, weigh 10 parts of ammonium molybdate, 35 parts of copper sulfate, 3 parts of sodium sulfite, 13.0 parts of sterilized fermented liquid and 60 1 part deionized water, pour it into a mixing mixer and stir for 2 hours, then pack it into a tank to obtain a high-adhesion selenium-free room temperature blackening solution.

example 2

[0023] Weigh 400g of Arabidopsis thaliana and 200g of egg yolk and put them into a tissue grinder to grind for 30 minutes to obtain a mixed grind. Spread the mixed grind on a stainless steel tray and place it in an environment with a temperature of 40°C and a relative air humidity of 60%. Mold naturally for 7 days to obtain moldy matter; mix moldy matter and water at a mass ratio of 1:2 and put it into a fermenter, seal the mouth of the tank and ferment for 10 days at 40°C, and take out the fermented product after the fermentation is over and filter , separated to obtain the filtrate, and then put the filtrate into a vacuum concentration tank to concentrate to 1 / 3 of the original volume of the filtrate to obtain a fermentation concentrate; weigh 900g soybean meal and add it to a mass fraction of 90% methanol solution at a mass ratio of 1:10 , leached at 70°C for 5h, filtered to remove the filter residue, and obtained the leaching filtrate, then put the leaching filtrate into a ...

example 3

[0025]Weigh 500g Dipsacus, 800g Cynomorium and 500g Psoraleae and put them into a Chinese medicine pulverizer to pulverize for 30min to obtain a mixed Chinese medicine powder, mix the mixed Chinese medicine powder and water in a mass ratio of 1:2 and put it into a fermenter, then Add 180g of grape skins into the fermenter, stir evenly with a stirring rod, seal the fermenter, and ferment at 45°C for 15 days; In a sterilization tank, sterilize at 120°C for 15 minutes to obtain a sterilized fermentation broth; weigh 400g of Arabidopsis thaliana and 200g of egg yolks and put them into a tissue grinder for 30 minutes to obtain a mixed pulverized product, and spread the mixed pulverized product on the In a stainless steel tray, place it in an environment with a temperature of 40°C and a relative air humidity of 60% for 7 days to naturally mold to obtain moldy matter; mix the moldy matter and water at a mass ratio of 1:2, put it into a fermenter, and seal it The tank mouth was kept a...

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PUM

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Abstract

The invention relates to a high-adhesion selenium-free normal temperature blackening liquid, and belongs to the technical field of steel treatment. First of all, an effective component which has a specific chelation effect on iron ions is extracted from a Chinese medicine, and used for chelating and shielding ferrous ions replaced from the surface of steel so as to avoid the ferrous ions to hinder copper plating on the surface of the steel; and then a soy saponine extracting solution is utilized to wash the surface of the steel so as to improve the wettability of the surface of the steel, in this way, liquid is easy to wet and be spread on the surface of the steel, so that forming of even blackening films is facilitated; and finally Arabidopsis thaliana and an egg yolk fermentation material are utilized to supply the elements of nitrogen, sulfur and phosphorus, a layer of chemical protection film is formed through reoxidation on a copper oxide layer of the surface of the steel and used for filling holes between the blackening films, so that the glossiness of the blackening films is enhanced; and meanwhile, combination between the blackening films and a steel substrate can further be firmer, and the adhesion performance of the blackening films is improved. The prepared blackening liquid has the characteristics of being even in film layer, the blackening films are good in glossiness, adhesion and corrosion resistance, the component is nontoxic and environmentally friendly, and the application prospects are wide.

Description

technical field [0001] The invention relates to a selenium-free room-temperature blackening solution with high adhesion and belongs to the technical field of iron and steel treatment. Background technique [0002] Blackening is a kind of surface finishing technology, which is widely used in the surface processing of steel items such as optical instruments, weapons, and standard parts, and has both antirust and decorative effects. The working temperature of the traditional blackening bath is above 130 ℃, which leads to high energy consumption and poor working conditions. Compared with alkaline high-temperature oxidation, normal temperature blackening operates at normal temperature, which saves electricity and energy and improves the working environment. At present, most of the practical blackening solutions at room temperature contain selenides. The copper-selenium room temperature blackening system undergoes a series of chemical reactions to finally generate black copper se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/05
CPCC23C22/05
Inventor 许双健林晨
Owner 平湖瑞星金属工艺有限公司
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