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Acid cleaning and phosphorizing method of electromobile frame

An electric vehicle and frame acid technology, applied in the direction of metal material coating process, etc., can solve the problems affecting the corrosion resistance of metal parts and product service life, the uneven thickness of metal surface film formation, and the unsmooth surface, so as to reduce the The effect of process pollution, less technical difficulty and strong operability

Inactive Publication Date: 2013-08-14
山东威斯特车业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the traditional metal surface phosphating solution treatment process, phosphate, nitrite and chromate are usually used. A variety of accelerators such as bromate, organic peroxide or chlorate need to be added to the chemical solution, which is easy to form sediment and high in cost; Accelerator control is not strict, resulting in uneven film thickness, rough surface and poor corrosion resistance on the metal surface, which affects the corrosion resistance of metal parts and product service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0048] A 48V12Ah electric vehicle high-carbon steel metal frame after degreasing and water washing was immersed in a pickling tank with a temperature of 45°C, a 98wt% concentrated sulfuric acid content of 10wt%, and a 826-type pickling corrosion inhibitor content of 0.20wt%. , control the total acidity to 60pt, and soak for 8 minutes. Make sure that the surface of the metal frame after pickling cannot be shiny, and the color should be black and consistent, as if a layer of film has been applied.

[0049] After pickling, the high-carbon steel metal frame of the electric vehicle is immersed in a normal temperature and 100wt% clear water pool for cleaning to remove the residual acid on the surface of the frame.

[0050] Immerse the high-carbon steel metal frame of the electric vehicle after pickling and water washing into a surface adjustment pool at room temperature and with a colloidal titanium BK-3 surface adjustment content of 0.1wt%, and control the pH value of the solution ...

example 2

[0057] A 48V12Ah electric vehicle high-carbon steel metal frame after degreasing treatment and water washing was immersed in a pickling tank with a temperature of 50°C, a 98wt% concentrated sulfuric acid content of 15wt%, and an LS-107 pickling corrosion inhibitor content of 0.4wt%. , control the total acidity to 80pt, and soak for 10 minutes. Make sure that the surface of the metal frame after pickling cannot be shiny, and the color should be black and consistent, as if a layer of film has been applied.

[0058] Water washing after pickling and surface adjustment are the same as example 1.

[0059] After surface adjustment, the high carbon steel metal frame of the electric vehicle is immersed in the phosphating at a temperature of 50°C and the content of ZY-304 zinc phosphate coating agent is 6wt%, the content of BF7018 neutralizing agent is 0.12wt%, and the content of BF7017 phosphating accelerator is 0.45wt%. Phosphate film in the pool. Control the total acidity of the so...

example 3

[0063] A 48V12Ah electric vehicle high-carbon steel metal frame after degreasing treatment and water washing was immersed in pickling at a temperature of 50°C, 98wt% concentrated sulfuric acid content of 15wt%, and YH-2 type pickling corrosion inhibitor content of 0.4wt%. In the tank, control the total acidity to 100pt and soak for 10 minutes. Make sure that the surface of the metal frame after pickling cannot be shiny, and the color should be black and consistent, as if a layer of film has been applied.

[0064] Water washing and surface adjustment after pickling are the same as example 1

[0065] After surface adjustment, the high carbon steel metal frame of the electric vehicle is immersed in a temperature of 50°C and the content of HRP-1401 zinc phosphate coating agent is 7wt%, the content of AIR-6 neutralizer is 0.14wt%, and the content of B26A phosphating accelerator is 0.5wt%. Phosphate film in the phosphating pool. Control the total acidity of the solution in the ph...

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Abstract

The invention relates to an acid cleaning and phosphorizing method of an electromobile frame, belonging to the technical field of metal surface treatment. The method comprises the following steps: (1) degreasing the metal frame; (2) cleaning with water; (3) immersing the metal frame in an acid cleaning solution to carry out acid cleaning; (4) flushing with water; (5) immersing in a surface conditioning tank to carry out surface conditioning; (6) immersing in a phosphorizing tank to carry out phosphorization and film formation; (7) cleaning in a clean water tank; and (8) drying in a phosphorizing line baking oven. The invention has the advantages of low technical difficulty, strong operability, simple technique, low deposit amount, high film formation speed, is simple and convenient for maintenance, greatly lowers the labor intensity of workers, and reduces the technical pollution; and the finally obtained grey phosphorized film has the advantages of uniform crystallization and moderate thickness, and greatly prolongs the service life of the electromobile metal frame.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a new pickling and phosphating method for an electric vehicle frame. Background technique [0002] In the electric vehicle manufacturing industry, the production and processing of the electric frame is an important link. In order to make the electric frame anti-rust and beautiful, a coating process is required. Pickling and phosphating treatment must be carried out before the painting process. Pickling is to remove stains on the surface of the metal frame of the electric vehicle, and phosphating treatment is to form a layer of phosphating film on the surface of the metal frame of the electric vehicle to make the paint film and the base metal Better adhesion and improved corrosion resistance of the entire coating system. [0003] At present, the most commonly used metal surface pickling is hydrochloric acid, phosphoric acid or nitric acid. Among them,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/02C23C22/07C23F17/00
Inventor 张晓舜刘念亭王科峰
Owner 山东威斯特车业有限公司
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