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Plasma body electrolytic deposition method of aluminium alloy cglinder body inner wall ceramic coating and its device

A technology of plasma electrolysis and ceramic coating, applied in the direction of anodic oxidation, phosphating, etc., can solve the problems of increasing the weight of the aluminum alloy cylinder body and complex process, and achieve the effect of solving the problem of wear resistance, simple process and reducing wear

Inactive Publication Date: 2005-10-05
INST OF MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: the process is complicated, and the weight of the aluminum alloy cylinder is increased at the same time

Method used

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  • Plasma body electrolytic deposition method of aluminium alloy cglinder body inner wall ceramic coating and its device
  • Plasma body electrolytic deposition method of aluminium alloy cglinder body inner wall ceramic coating and its device
  • Plasma body electrolytic deposition method of aluminium alloy cglinder body inner wall ceramic coating and its device

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Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1, prepare ceramic coating in engine aluminum alloy cylinder body with device and method of the present invention, its steps are as follows:

[0030] 1) Clean and degrease the aluminum alloy cylinder body;

[0031] 2) Pump the electrolyte in the electrolyte storage tank in the cooling pool into the aluminum alloy cylinder, the electrolyte is a sodium phosphate solution, and the concentration of the sodium phosphate solution is 10% by weight; A stainless steel rod in the alloy cylinder is used as the cathode, and the aluminum alloy cylinder is used as the anode, and the asymmetric AC power connected to it is connected.

[0032] The forward current density 10A / dm of the asymmetrical AC power that the present embodiment passes through 2 , negative current density 2.5A / dm 2 .

Embodiment 2

[0033] Embodiment 2, prepare ceramic coating in engine aluminum alloy cylinder body with device and method of the present invention, its steps are as follows:

[0034] 1) Clean and degrease the aluminum alloy cylinder body;

[0035] 2) Pump the electrolyte in the electrolyte storage pool placed in the cooling pool into the aluminum alloy cylinder, the electrolyte is a mixed solution of sodium phosphate solution and sodium borate solution, and its concentration is 10%. The ratio of sodium phosphate content to sodium borate content in the liquid is 98:2; a stainless steel metal rod placed in the aluminum alloy cylinder is used as the cathode, and the aluminum alloy cylinder is used as the anode, and the asymmetric AC connected to it is connected. Power supply, plasma electrolysis for 60 minutes; a layer of 15μm ceramic coating is prepared in the aluminum alloy cylinder.

[0036] The forward current density 10A / dm of the asymmetrical AC power that the present embodiment passes t...

Embodiment 3

[0037] Embodiment 3, prepare ceramic coating in engine aluminum alloy cylinder body with device and method of the present invention, its steps are as follows:

[0038] 1) Clean and degrease the aluminum alloy cylinder body;

[0039] 2) Pump the electrolyte in the electrolyte storage pool placed in the cooling pool into the aluminum alloy cylinder, the electrolyte is a mixed solution of sodium phosphate solution and sodium borate solution, and its concentration is 10%. The ratio of sodium phosphate content to sodium borate content in the liquid is 95:5; a stainless steel rod placed in the aluminum alloy cylinder is used as the cathode, and the aluminum alloy cylinder is used as the anode, and the asymmetric AC power connected to it is connected. , Plasma electrolysis for 150 minutes; a layer of 50μm ceramic coating is prepared in the aluminum alloy cylinder.

[0040] The forward current density 10A / dm of the asymmetrical AC power that the present embodiment passes through 2 ,...

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Abstract

A process for preparing a coated ceramic layer on the inner surface of Al-alloy cylinder by plasma electrolyzing deposition includes washing said Al-alloy cylinder while removing oil fron it, pumping the electrolyte liquid in the cylinder, which is the solution of sodium phosphate or the mixture of sodium phosphate solution and sodium borate solution, and plasma electrolyzing for 20-150 min by using the cylinder as anode and the stainless steel rod in the cylinder as cathode. Its apparatus is composed of asymmetrical AC power supply, electrolyte liquid pool in cooling pool, and insulating cylinder supporter, circulating pump and U-shaped pipe.

Description

field of invention [0001] The invention belongs to a method for preparing a ceramic coating on the inner wall of an aluminum alloy cylinder and a preparation device thereof, in particular to a method and a device for plasma electrolytic deposition of a ceramic coating on the inner wall of an aluminum alloy cylinder. Background technique [0002] The lightweight of automobiles and motorcycles is a very important development trend. In order to reduce the weight of the vehicle body, technical personnel have done a lot of work. The weight of the vehicle body can be greatly reduced by replacing all or a part of the body material from high-density steel material with low-density aluminum alloy material. The weight of the engine accounts for a large proportion of the body weight, so how to reduce the weight of the engine has become a hot topic for researchers. [0003] Due to the poor wear resistance of aluminum alloy, after the engine is replaced by aluminum alloy from the origi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/08C25D11/36
Inventor 夏原关永军李方春
Owner INST OF MECHANICS CHINESE ACAD OF SCI
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