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High-temperature manganese-zinc series phosphating solution and phosphating process

A phosphating, manganese-zinc technology, applied in the direction of metal material coating process, etc., can solve the problems of rough surface, coarse film crystallization, failure to meet the use requirements of oil pump housing, etc. Corrosion resistance, the effect of excellent corrosion resistance

Inactive Publication Date: 2020-02-28
XIAN AERO ENGINE CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The phosphating film layer formed at medium temperature and low temperature is relatively thin, and the film layer of the forming layer has coarse crystals and rough surface, which cannot meet the requirements of the oil pump casing in harsh environments

Method used

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  • High-temperature manganese-zinc series phosphating solution and phosphating process
  • High-temperature manganese-zinc series phosphating solution and phosphating process
  • High-temperature manganese-zinc series phosphating solution and phosphating process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The content of each component in the phosphating solution adopted in the present embodiment is the manganese phosphate of 50g / L, the zinc nitrate of 30g / L, the zinc dihydrogen phosphate of 30g / L, the calcium chloride of 7g / L, phosphoric acid 15mL / L. Phosphating treatment is carried out on 12CrNi3A steel parts, wherein the temperature of the solution is 90°C and the time is 5 minutes. After phosphating, put it into BH-208 water-repellent agent for water-repellent treatment, temperature: room temperature, and keep for 8 minutes. Polymerization hardens for 18 hours after hydrophobic treatment. Carry out high-temperature manganese-zinc system phosphating to iron and steel parts through the treatment process described in the present invention to form a phosphating film layer, and at the same time, carry out a neutral salt spray test on the iron and steel parts after phosphating treatment, after 12 hours, no rust phenomenon is found , that is, the neutral salt spray test o...

Embodiment 2

[0033] The content of each component in the phosphating solution adopted in the present embodiment is the manganese phosphate of 41g / L, the zinc nitrate of 26g / L, the zinc dihydrogen phosphate of 22g / L, the calcium chloride of 5g / L, phosphoric acid 10mL / L. Phosphating treatment is carried out on 12CrNi3A steel parts, wherein the temperature of the solution is 85°C and the time is 5 minutes. After phosphating, put it into BH-208 water-repellent agent for water-repellent treatment, temperature: room temperature, and keep for 5 minutes. Polymerization hardens for 12 hours after hydrophobic treatment. Carry out high-temperature manganese-zinc system phosphating to iron and steel parts through the treatment process described in the present invention to form a phosphating film layer, and at the same time, carry out a neutral salt spray test on the iron and steel parts after phosphating treatment, after 10 hours, no rust phenomenon is found , that is, the neutral salt spray test o...

Embodiment 3

[0035] The content of each component in the phosphating solution adopted in the present embodiment is the manganese phosphate of 46g / L, the zinc nitrate of 28g / L, the zinc dihydrogen phosphate of 25g / L, the calcium chloride of 6.5g / L, phosphoric acid 13mL / L. Phosphating treatment is carried out on 12CrNi3A steel parts, wherein the temperature of the solution is 88°C and the time is 6 minutes. After phosphating, put it into BH-208 water-repellent agent for water-repellent treatment, temperature: room temperature, and keep for 6 minutes. Polymerization and hardening for 15 hours after hydrophobic treatment. Carry out high-temperature manganese-zinc system phosphating to iron and steel parts through the treatment process described in the present invention to form a phosphating film layer, and at the same time, carry out a neutral salt spray test on the iron and steel parts after phosphating treatment, after 11 hours, no corrosion phenomenon is found , that is, the neutral salt...

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Abstract

The invention belongs to the field of material surface treatment, and relates to a high-temperature manganese-zinc series phosphating solution and a phosphating process. The high-temperature manganese-zinc series phosphating solution comprises manganese nitrate with the concentration of 40-60g / L, zinc nitrate with the concentration of 25-35g / L, zinc dihydrogen phosphate with the concentration of 20-40g / L, calcium chloride with the concentration of 5-10g / L and phosphoric acid with the concentration of 10-20 mL / L. The high-temperature manganese-zinc series phosphating solution and the phosphating process are environmentally friendly, a compact film layer can be formed, the influence on the surface roughness of parts is small, and the corrosion resistance of the parts can be remarkably improved.

Description

technical field [0001] The invention belongs to the field of material surface treatment, and relates to a high-temperature manganese-zinc phosphating treatment solution and a phosphating process, in particular to a manganese-zinc phosphating treatment solution that can be used for steel parts such as oil pump casings, powerful bolts, and high-temperature bolts. Phosphating process. Background technique [0002] Phosphating treatment is required on the surface of existing parts such as motor oil pump housings and powerful bolts to obtain a phosphating film with high corrosion resistance, wear resistance, heat resistance, bonding force and hardness. Thereby improving the performance of parts. The phosphating treatment of iron and steel parts is to put metal parts into a monophosphate solution containing zinc, manganese or iron to undergo a chemical reaction, so that an insoluble phosphate film is formed on the surface of the metal parts. Phosphate treatment methods include h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/22C23C22/73C23C22/83
CPCC23C22/22C23C22/73C23C22/83
Inventor 吴雨桥刘静任可真吴晓伟刘晓华王曦
Owner XIAN AERO ENGINE CONTROLS