Engine cylinder head surface treatment method

A technology for engine cylinder and surface treatment, which is applied in the field of engine cylinder head surface treatment, which can solve the problems of no anti-corrosion effect and insufficient brightness of the cylinder head surface, etc., and achieve a good effect of high resistance to discoloration

Active Publication Date: 2017-06-30
WUHU YONGYU AUTOCAR INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, whether it is a single shot peening treatment or a mixed treatment technology of shot peening and chromate, the aluminum alloy cylinder head has major disadvantages, the surface of the cylinder head is not bright enough, and it does not have anti-corrosion effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a surface treatment method for an aluminum alloy engine cylinder head, comprising the following steps:

[0038] (1) Electrolysis process: Electrolyze the cylinder head in the electrolyte solution set in the electrolytic cell;

[0039] In the electrolyte, the concentration of sodium sulfate is 15g / L, the concentration of zinc oxide is 3g / L, the concentration of sodium peroxide is 3g / L, the concentration of sodium dodecylsulfonate is 2g / L, and the balance is water; The density is 1A / dm 2 , The electrolysis time is 5 minutes.

[0040] (2) Soaking process: put the electrolyzed cylinder head into the protective solution for 30 seconds;

[0041] (3) Curing process: After the cylinder head is pulled out, use a high-pressure air gun to blow off the excess sol gel hanging on the surface of the cylinder head, and dry the cylinder head naturally to cure, so that the surface of the cylinder head can prevent aluminum alloy from forming. Discoloration, mil...

Embodiment 2

[0043] This embodiment provides a surface treatment method for an aluminum alloy engine cylinder head, comprising the following steps:

[0044] (1) Electrolysis process: Electrolyze the cylinder head in the electrolyte solution set in the electrolytic cell;

[0045] In the electrolyte, the concentration of sodium sulfate is 18g / L, the concentration of zinc oxide is 3.5g / L, the concentration of sodium peroxide is 4g / L, the concentration of sodium dodecylsulfonate is 1g / L, and the balance is water; The density is 2A / dm 2 , The electrolysis time is 4 minutes.

[0046] (2) Soaking process: put the electrolyzed cylinder head into the protective solution for 30 seconds;

[0047] (3) Curing process: After the cylinder head is pulled out, use a high-pressure air gun to blow off the excess sol gel hanging on the surface of the cylinder head, and dry the cylinder head naturally to cure, so that the surface of the cylinder head can prevent aluminum alloy from forming. Discoloration, m...

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PUM

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Abstract

The invention discloses a surface treatment method for an engine cylinder head. The surface treatment method comprises the steps that (1) an electrolysis process is conducted, and the cylinder head is electrolyzed in an electrolyte arranged in an electrolytic cell; (2) a soaking process is conducted, and the electrolyzed cylinder head is placed in protective liquid to be soaked; and (3) a solidification process is conducted, the soaked cylinder head is solidified, and a protection film is formed on the surface of the cylinder head. According to the surface treatment method for the engine cylinder head, a clean appearance on the surface of the cylinder head can be obtained, and burnt-on sand in an inner hole channel of the cylinder head can be removed. A blackening or graying appearance caused by shot blasting is avoided, and the mildew resistant protection film is obtained at the same time. The protection film has good properties of high discoloration resistance and corrosion resistance. The bright and beautiful cylinder head is obtained, and the cylinder head has the anticorrosion and mildew resistant effects at the same time.

Description

technical field [0001] The invention belongs to the technical field of engines, in particular, the invention relates to a surface treatment method of an engine cylinder head. Background technique [0002] Aluminum alloy cylinder head is a common engine component for small axle vehicles. Compared with cast iron cylinder head, it has the advantages of light specific gravity, low difficulty in casting and processing, and is widely used in small vehicles. [0003] The composition of aluminum alloy cylinder head is generally aluminum-silicon alloy, which has the advantages of good casting performance and high mechanical properties, but the silicon content in the alloy also brings difficulties to surface treatment. [0004] At present, for the surface treatment of aluminum alloy cylinder heads, sandblasting or shot peening is mainly used. In order to save costs, the raw materials for sandblasting or shot peening, sand or steel shot, are reused. [0005] A large amount of oil stic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25F1/04
Inventor 郑志勋
Owner WUHU YONGYU AUTOCAR INDAL
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