the application of aluminum alloy in industry increases year by year, but also have some problems in the use of aluminum components, mainly abrasion resistance is poor, the reason is that low hardness, high coefficient of friction, wear, easy to strain and lubrication, the second is the strength is not easy to deformation, again in the alkaline medium and chloride ion environment easy to corrode, it limits the further application of aluminum. shanghai fujian kennedy aluminum companies in the treatment of the aluminum alloy surface hardening, through joint research center and central south university of science and technology of the company, to find a set of effective measures. aluminum alloy anodic oxidation, we think, is a kind of method can effectively solve the above problems, including hard anodized aluminum can be improved corrosion resistance, abrasion resistance, heat resistance and insulation, the coating hardness can reach more than hv400 and thickness can reach dozens or even hundreds of microns, thickness of easy control, high dimensional accuracy, many of the artifacts can be applied directly to use after processing, with microporous membrane layer, can absorb a variety of lubricant,resistance to breakdown voltage is 2000 v, combined with matrix and firm, so in the aviation, aerospace, ships, automobiles, motorcycles, electronics, instrumentation, textile and machinery industry has extensive application prospect.
technical principle and process flow: technical principle: the process for aluminum alloy electrochemical oxidation film formation method.
raw material→contour machining→ungrease treatment→wash processing→acid pickling→polishing→anodizing→washing
achievement levels and main technical indicators: the results of mature technology, advanced equipment and technology, used in membrane layer thickness can be according to the requirement of the workpiece, high dimensional accuracy, many artifacts can directly use the assembly, hardness can reach more than hv400 and bonding strength is electrodeposited coating is much higher, in use is not easy to fall off. after oxidation treatment workpiece can improve the wear life more than 1 times.process cost is low. market feasibility: with the increase of dosage of aluminum alloy parts, surface strengthening requirements become increasingly intense, at present, the application is more hard chrome plating, but chrome is scarce goods, and the combination of coating and the magnesium substrate not firm, use easy fall off form of abrasive wear, combined with the environmental pollution problems difficult to solve. in developed countries, hard anodic oxidation has been more widely adopted, the car industry, such as japan, engine piston, cylinder, fuel injector, piston, motorcycle carburetor needle valve, piston, etc have been hard anodic oxidation treatment, but these parts in our country are not do processing and direct use, affect the product quality and the life.hard anodized in the country is in a stage of transformation from scientific research to production, cars, motorcycles and other industries also begin to realize its superiority, some manufacturer is looking for this technology, market prospects and considerable economic benefit.
the implementation of conditions: main equipment: work group, oxidation with power supply system, tank liquid circulation, filter system, heat exchange system, air mixing system, exhaust system.
with the increase of dosage of aluminum alloy parts, surface strengthening requirements become increasingly intense, is plated at present our country is widely applied chromium, but the chromium is scarce goods, and in combination with coating and the magnesium substrate not firm, use easy fall off form of abrasive wear, plus such problems as environmental pollution is difficult to solve. in the industrial developed country, hard anode oxidation has been more widely adopted, example the car industry, such as japan, engine piston, cylinder, fuel injector, piston, motorcycle carburetor needle valve, piston, etc after a hard anodic oxidation treatment, but these parts are in our country dont do processing and direct use, affect the product quality quantity and the life. hard anodized in domestic is in a stage of transformation from scientific research to production, automobile, motorcycle and it some industries are beginning to recognize its advantages, some manufacturers are looking for this technology, market prospect and economic benefit considerable.