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Microcrystalline phosphating solution for brake block hardware

A technology for phosphating treatment and hardware, applied in the field of phosphating treatment liquid, can solve the problems of limited phosphating effect, unsatisfactory surface quality and corrosion resistance of phosphating parts, unenvironmental phosphating liquid, etc. Excellent environmental protection, low cost and fast phosphating speed

Inactive Publication Date: 2009-01-21
RUIYANG AUTOMOTIVE MATERIALS XIANTAO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This invention mainly solves technical problems such as the traditional phosphating solution is not environmentally friendly, the phosphating effect is limited, the surface quality and corrosion resistance of phosphating parts are not ideal, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: in the phosphating tank, pour 300 parts of (every part of 1Kg, hereinafter the same) water, then 30 parts of Mazhifu salts are added in the tank, under constant stirring state, add 30 parts of zinc dihydrogen phosphate, After the two are fully dissolved, pour 300 parts of water to dilute; pour 45 parts of zinc nitrate into the phosphating tank, stir and dissolve, heat the solution to 70°C, add 2 parts of citric acid, 3 parts of tartaric acid, 3 parts of 2 parts of sulfosalicylic acid, fully stirred, and mixed; then 2 parts of sodium tripolyphosphate and 2 parts of m-nitrobenzene sodium sulfonate were added to the phosphating tank in turn, after stirring and dissolving, pour 400 parts of water, slowly Slowly add 1.5 parts of guanidine nitrate, stir well, and after mixing evenly, the microcrystalline phosphating treatment liquid for the brake pad hardware can be obtained.

Embodiment 2

[0019] Embodiment 2: in the phosphating tank, pour 360 parts of (every part of 1Kg, hereinafter the same) water, then 40 parts of Mazhifu salts are added in the tank, under constant stirring state, add 22 parts of zinc dihydrogen phosphate, After the two are fully dissolved, pour 360 parts of water to dilute; pour 50 parts of zinc nitrate into the phosphating tank, stir and dissolve, heat the solution to 75°C, add 1.5 parts of citric acid, 2 parts of tartaric acid, 2 1 part of sulfosalicylic acid, fully stirred, and mixed; then 1 part of sodium tripolyphosphate and 1.5 parts of sodium m-nitrobenzene sulfonate were added to the phosphating tank in sequence, after stirring and dissolving, pour 480 parts of water, slowly Slowly add 2 parts of guanidine nitrate, stir well, and after mixing evenly, the microcrystalline phosphating treatment liquid for the brake pad hardware can be obtained.

Embodiment 3

[0020] Embodiment 3: in the phosphating tank, pour 330 parts of (every part of 1Kg, hereinafter the same) water, then 35 parts of Mazhifu salts are added in the tank, under constant stirring state, add 26 parts of zinc dihydrogen phosphate, After the two are fully dissolved, pour 330 parts of water to dilute; pour 40 parts of zinc nitrate into the phosphating tank, stir and dissolve, heat the solution to 65°C, add 2.5 parts of citric acid, 4 parts of tartaric acid, 2.5 parts of 1 part of sulfosalicylic acid, fully stirred and mixed; then 1.5 parts of sodium tripolyphosphate and 1.8 parts of sodium m-nitrobenzene sulfonate were added to the phosphating tank in turn, after stirring and dissolving, pour 440 parts of water, slowly Slowly add 1.8 parts of guanidine nitrate, stir well, and after mixing evenly, the microcrystalline phosphating treatment liquid for the brake pad hardware can be obtained.

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Abstract

The invention provides a pollution-free microcrystalline phosphating treatment solution for brake pad hardware, which is mainly made from the following raw materials in portion by weight: 40 to 50 portions of zinc nitrate, 22 to 30 portions of zinc dihydrogen phosphate, 30 to 40 portions of Mazhev salt (manganous dihydrogen phosphate), 1.5 to 2 portions of guanidine nitrate, 1.5 to 2 portions of sodium m-nitrobenzene sulfonate, 1 to 2 portions of sodium tripolyphosphate, 2 to 4 portions of tartaric acid, 2 to 3 portions of sulfosalicylic acid, 1.5 to 2.5 portions of citric acid and 1,000 to 1,200 portions of water. The solution is used for the blackening-phosphating treatment of the surface of iron hardware, and has the characteristics of fast phosphorization, good performances, little environmental pollution, low cost, etc. The treatment solution has the advantages of fine phosphatized crystals of phosphating films, uniform color in consistent black and good corrosion resistance. Especially, as the treatment solution chooses the raw materials with little environmental pollution and high efficiency, the treatment solution acquires excellent effects in both phosphatization and environmental protection through optimized combination and reasonable proportioning.

Description

technical field [0001] The invention relates to a phosphating treatment liquid, in particular to a pollution-free microcrystalline phosphating treatment liquid for brake pad hardware. Background technique [0002] Brake pad hardware is an iron accessory commonly used in brake pads. At present, the surface treatment of brake pad hardware has been extensively phosphating. When the surface of the brake pad hardware is phosphated, it has better corrosion resistance. However, the existing phosphating treatment solution contains many harmful components, such as nitrite, heavy metal nickel and the like. These substances are very easy to pollute the environment and have carcinogenic effects on the human body. On the other hand, among the existing disclosed phosphating solution formulations, black phosphating treatment of small hardware can achieve rapid response, good surface quality, and environmentally friendly phosphating solutions are almost rare. For example, an intermediate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/07
Inventor 张泽伟
Owner RUIYANG AUTOMOTIVE MATERIALS XIANTAO
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