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Surface treatment method of aluminum alloy cylinder head

A surface treatment and cylinder head technology, which is applied in the field of aluminum alloy engine cylinder head surface treatment, 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: 2017-11-21
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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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: in the electrolyte solution arranged in the electrolytic cell, the cylinder head is electrolyzed;

[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 electrolytic current density 1A / dm 2 , The electrolysis time is 5 minutes.

[0040] (2) Soaking process: put the electrolyzed cylinder head into the protective solution and soak 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 al...

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: in the electrolyte solution arranged in the electrolytic cell, the cylinder head is electrolyzed;

[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 and soak 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...

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Abstract

The invention discloses a surface treatment method for an aluminum alloy air cylinder cover. The surface treatment method comprises the steps that an electrolysis process is conducted, namely, the air cylinder cover is electrolyzed in an electrolyte contained in an electrolytic bath; a soaking process is conducted, namely, the electrolyzed air cylinder cover is put into protective liquid to be soaked; and a solidification process is conducted, namely, the soaked air cylinder cover is solidified, and a protective film is formed on the surface of the air cylinder cover. The electrolyte comprises, by concentration, 15 g / L of sodium sulfate, 3 g / L of zinc oxide, 3 g / L of sodium peroxide, 2 g / L of sodium dodecyl sulfate, and the balance water. According to the surface treatment method for the aluminum alloy air cylinder cover, the appearance with the clean surface can be obtained for the air cylinder cover, and burnt-on sand in an inner hole channel of the air cylinder cover can also be removed, so that a nigrescent or grey appearance generated through shot blasting is avoided, and meanwhile the mildew-stain-proof protective film is obtained. The protective film has good properties of the high-discoloration resistance and corrosion resistance, so that the light and attractive air cylinder cover is obtained, and meanwhile, the air cylinder cover has the effects of corrosion prevention and mildew-stain prevention.

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 aluminum alloy 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 amo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/04C23C18/12C25F1/04
CPCC23C18/04C23C18/1208C23C18/1254C25F1/04
Inventor 郑志勋
Owner WUHU YONGYU AUTOCAR INDAL
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