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Automobile hub surface treatment method

A technology for the surface treatment of automobile wheels, which is applied to the surface coating liquid device, metal material coating process, coating, etc., can solve the problems of complex surface treatment process of automobile wheels, insufficient smoothness of the surface of the wheel hub, poor corrosion resistance, etc. , to achieve the effect of ensuring the coating effect, preventing shedding, and reducing the degree of pollution

Inactive Publication Date: 2021-03-19
秦皇岛艾科晟科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the surface of the automobile wheel in the prior art is not smooth enough, the corrosion resistance is poor, the service life is short, and the surface treatment process of the automobile wheel is relatively complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A surface treatment method for an automobile wheel hub, comprising the following steps:

[0044] S1: Grinding

[0045] Place the wheel hub in a vibration grinder and grind it at a frequency of 20 Hz for 40 minutes, then remove the car wheel hub and drain it, rinse it with pure water for 2 minutes, and then dry it at 120°C;

[0046] S2: polished

[0047] The car hub is used as the anode, and the platinum sheet is used as the cathode. The car hub and the platinum sheet are respectively connected to the positive and negative poles of the DC power supply, and the car wheel hub and the platinum sheet are immersed in the electrolyte for electrolytic polishing for 2 minutes. The pH value of the electrolyte is 4. The temperature is 50°C, the electrolytic solution is composed of phytic acid, sulfuric acid and folic acid, of which phytic acid is 18%, sulfuric acid is 4%, folic acid is 0.2%, and the rest is water. After the car wheel is taken out and drained, it is rinsed with pu...

Embodiment 2

[0059] A surface treatment method for an automobile wheel hub, comprising the following steps:

[0060] In step S1, the wheel hub is placed in a vibrating grinder for 30 min at a frequency of 30 Hz;

[0061]In step S2, the pH value of the electrolytic solution is 5.5, the temperature is 30° C., and the electrolytic solution is composed of phytic acid, sulfuric acid and folic acid, wherein phytic acid is 18%, sulfuric acid is 6%, folic acid is 0.2%, and the rest is water;

[0062] In step S3, the degreasing agent is a mixture of sodium hydroxide 20%, sodium phosphate 10% and water, the corrosion inhibitor is a mixture of petroleum rare earth sulfonate 15%, methyl cellulose 2.5% and water, and the surfactant It is fatty alcohol polyoxyethylene ether sodium sulfate;

[0063] In step S4, the automobile wheel hub is immersed in a mixed solution of phosphoric acid and phytic acid with a mass ratio of 7:3, the mass percentage of the mixed solution is 3%, the soaking temperature is 6...

Embodiment 3

[0067] A surface treatment method for an automobile wheel hub, comprising the following steps:

[0068] In step S1, the wheel hub is placed in a vibratory grinder for grinding at a frequency of 23 Hz for 36 min;

[0069] In step S2, the pH value of the electrolytic solution is 4.5, the temperature is 45° C., and the electrolytic solution is composed of phytic acid, sulfuric acid and folic acid, wherein phytic acid is 18%, sulfuric acid is 6%, folic acid is 0.2%, and the rest is water;

[0070] In step S3, the degreasing agent is a mixture of sodium hydroxide 13%, sodium phosphate 9% and water, and the corrosion inhibitor is a mixture of petroleum rare earth sulfonate 13%, methylcellulose 1.5% and water;

[0071] In step S4, the automobile wheel hub is immersed in a mixed solution of phosphoric acid and phytic acid with a mass ratio of 7:3, the mass percentage of the mixed solution is 1.5%, the soaking temperature is 58°C, and the soaking time is 210s;

[0072] In step S7, the...

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PUM

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Abstract

The invention provides an automobile hub surface treatment method. The surface treatment method comprises the following steps of S1, performing grinding; S2, conducting polishing; S3, removing oil stains; S4, performing pickling; S5, conducting passivation; S6, conducting electroplating; and S7, performing spraying. According to the automobile hub surface treatment method, by grinding, degreasing,pickling and passivating an automobile hub, the stability of a subsequent coating film is improved, so that the rejection rate of the coating film is reduced, the coating film is not prone to fallingoff, the service life of the coating film is prolonged, and the corrosion resistance of the surface of the automobile hub is greatly improved by adopting an electroplating and spraying method after passivation.

Description

technical field [0001] The invention relates to a surface treatment method for an automobile wheel hub, which belongs to the technical field of surface treatment of automobile parts. Background technique [0002] With the development of society, the demand for automobiles is increasing. The wheel hub is an important component of the automobile, and the performance of the wheel hub is directly related to the performance of the entire automobile. [0003] However, the surface of the automobile wheel hub in the prior art is not smooth enough, the corrosion resistance is poor, the service life is short, and the surface treatment process of the automobile wheel hub is relatively complicated. Contents of the invention [0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method for surface treatment of automobile wheel hubs, so as to solve the problems raised in the above-mentioned background technology. [0005] In order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/34C25F3/16C23G1/18C25D3/12C23G1/02C23C22/34B05D1/38B05D7/24B05D7/26B05D7/16B05D7/14B05D1/02B05D1/06
CPCC25D5/34C25F3/16C23G1/18C25D3/12C23G1/02C23C22/34B05D7/544B05D7/546B05D7/24B05D7/26B05D7/16B05D7/14B05D1/02B05D1/06C23C2222/20
Inventor 陈彦广蔡景坤陈艺文郭颖
Owner 秦皇岛艾科晟科技有限公司
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