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Surface ceramic method for aluminum, magnesium alloy and product thereof

A magnesium alloy and aluminum alloy technology, which is applied in anodic oxidation, superimposed layer plating, metal material coating technology, etc., to achieve the effect of prolonging the service life

Active Publication Date: 2010-12-08
北京杜尔考特科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above problems are specific to the field of automobile industry. In the development process of new products of aluminum and magnesium alloy parts such as magnesium alloy wheels, the problems are more prominent. Currently, the above-mentioned conventional methods are used for processing The products cannot meet the requirements of corrosion resistance, wear resistance, stone impact resistance and scratch resistance.

Method used

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  • Surface ceramic method for aluminum, magnesium alloy and product thereof
  • Surface ceramic method for aluminum, magnesium alloy and product thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] After the procedure of applying the DC pulse voltage is finished, an AC pulse voltage is applied to the electrolysis circuit, and the pulse frequency of the AC pulse voltage is 100 Hz. With the change of the polarity of the AC pulse voltage, the electrolysis circuit changes between the anodized state and the cathodic state. When the surface of the workpiece to be processed is used as the cathode, it is called the cathode state. The voltage amplitude applied to the electrolysis circuit during anodization is the anodization voltage amplitude; the voltage amplitude applied to the electrolysis circuit during cathodization is the cathode voltage amplitude. In this embodiment, the amplitudes of the anodizing voltage and cathodicizing voltage of the applied AC pulse voltage are the same (both are 300V) and remain unchanged, and the application time is 3 hours.

[0032] Of course, according to the prior art, the composition and microstructure of the final ceramic membrane can ...

Embodiment 2

[0036] The difference between this embodiment and Embodiment 1 is that the pulse frequency of the selected DC pulse voltage is 1500Hz, the amplitude of the DC pulse voltage is 500V, and the time for applying the DC pulse voltage is 1 hour; the pulse frequency of the AC pulse voltage is 2000Hz, and the AC pulse voltage is 2000Hz. The amplitudes of pulse voltage anodization voltage and cathodization voltage are both 350V, and the application time is 6 hours.

Embodiment 3

[0038] The difference between this embodiment and Embodiment 1 is that the pulse frequency of the selected DC pulse voltage is 1800Hz, the amplitude of the DC pulse voltage is 550V, and the time for applying the DC pulse voltage is 0.8 hours; the pulse frequency of the AC pulse voltage is 2000Hz, and the AC pulse voltage is 2000Hz. The amplitudes of pulse voltage anodizing voltage and cathodicizing voltage are both 200V, and the application time is 3 hours.

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Abstract

The invention belongs to the alloy surface processing technology and aims at providing a technological method for forming a ceramic layer on the surface of aluminum alloy and magnesium alloy and the product. The method for forming ceramic surface on aluminum alloy or magnesium alloy is as follows: the surface to be processed of a work piece which is made of aluminum alloy or magnesium alloy is put in electrolyte, and the surface to be processed which is taken as an electrode of an electrolytic loop in the electrolyte applies direct current impulse voltage to the electrolytic loop, and the surface to be processed is the anode (anodization), and the applied direct current impulse voltage amplitude value is more than or equal to 400 volt, and the applied time is 0.5 hour to 2 hours, then theelectrolytic loop is applied with alternating current impulse voltage. By adopting the invention, a ceramic surface with excellent physicochemical property can be formed on the surface of the work piece which is made of aluminum alloy or magnesium alloy.

Description

technical field [0001] The invention belongs to the technology of alloy surface treatment, in particular to the technology of ceramicizing the surface of aluminum and magnesium alloys. Background technique [0002] At present, aluminum alloy or magnesium alloy workpieces used in frictional environments have a variety of friction, wear and corrosion phenomena such as brush erosion, cavitation, etc., resulting in short service life of these workpieces, which seriously restricts the application of aluminum and magnesium alloy components in major industrial fields. . [0003] There are many methods to strengthen the surface characteristics of the workpiece to solve the above problems, such as the common method of forming a ceramic film on the surface of the alloy workpiece. This technology puts the surface of the workpiece to be processed in the electrolyte and establishes an electrolytic circuit. The workpiece to be processed The surface is an electrode, and then an alternati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/02C23C28/00
Inventor 杜克勤
Owner 北京杜尔考特科技有限公司