Method for preparing titanium oxide based ceramic membrane layer on surface of light metal or alloy of light metal
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A manufacturing method and technology of ceramic film layer, which is applied in the direction of anodic oxidation, electrolytic inorganic material coating, etc., can solve the problems of large transition layer size, poor bonding force, and high porosity of titanium alloy micro-arc oxidation coating, so as to improve production efficiency , Improve efficiency, excellent hardness effect
Active Publication Date: 2015-04-29
东莞市武华新材料有限公司
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However, as a ceramic coating, it also has high porosity and poor toughness, and the transition layer of titanium alloy micro-arc oxidation coating has a large size, obvious interface, and poor bonding force.
[0004] Patent document CN 102634832A A method for preparing the surface coating of an aluminum
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[0034] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be emphasized that the following description is exemplary only, and is not intended to limit the scope of the invention and its application.
[0035] see figure 1 and figure 2 , according to an embodiment of the present invention, a method for manufacturing a titanium oxide-based ceramic film layer on the surface of a light metal or its alloy, using a composite process of anodic plasma discharge oxidation and electrochemical deposition, comprising: mixing the light metal or its alloy (such as aluminum or magnesium) (or titanium substrate) or workpieces covered with light metals or their alloys, firstly in an acidic solution containing titanium salts with a pH value of 1.5 to 5.0, at 3 to 10 A / dm 2 Anode plasma discharge oxidation is carried out under the voltage of 10-50V DC to obtain a dense, uniform and porous oxide film, which is mainly...
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Abstract
The invention discloses a method for preparing a titanium oxide based ceramic membrane layer on the surface of a light metal or an alloy of the light metal. The method comprises the following step of continuously carrying out anodic plasma discharge oxidation and electrochemical deposition combined process treatment on a workpiece made from the light metal or the alloy of the light metal or a workpiece coated with the light metal or the alloy of the light metal in an electrolytic tank, wherein electrolyte is an acidic solution which contains titanium salt and has a pH value of 1.5-5.0, the electrolyte is controlled at the temperature of 5-35 DEG C, direct current is used in an anodic plasma discharge oxidation stage, and alternating current is used in an electrochemical deposition stage, the current density is 3-10A/dm<2>, the peak voltage of electrochemical deposition is 300-600V, and the treatment time is 0.5-5 minutes. The method disclosed by the invention can be used for preparing the high-quality titanium oxide based ceramic membrane layer on the surface of the light metal or the alloy of the light metal, outstandingly enhancing the property and yield of a product and greatly improving the preparation efficiency.
Description
technical field [0001] The invention relates to metal surface treatment technology, in particular to a method for manufacturing a titanium oxide-based ceramic film layer on the surface of light metal or its alloy. Background technique [0002] Light metals such as aluminum, magnesium, titanium and their alloys have excellent properties such as low density, high specific strength, excellent electrical and thermal conductivity, corrosion resistance, good plasticity and formability, easy processing, and no low-temperature brittleness. In terms of applicability, it has become the second largest type of metal material after steel. They can be processed into various structural parts through various processes such as extrusion, forging and die-casting, and are widely used in automobiles, aviation, aerospace, ships, medical care, construction, military, communications, electronics, electrical appliances, LED lighting, etc. in almost all in the industrial field. [0003] Traditiona...
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