Hard anodizing technological process for 7050 super-thick aluminum alloy

Abstract

The invention belongs to hard anodizing technologies for super-thick aluminum alloy materials and particularly relates to a hard anodizing technological process for an 7050 super-thick aluminum alloy. Sulfuric acid is adopted as an electrolyte, a part is adopted as an anode, a lead plate is adopted as a cathode, direct current circulates, compressed air is used for stirring, and an electrochemical reaction of the electrolyte at low temperature is kept. An oxidation film which has the characteristics of high hardness, good abrasion resistance, heat resistance and insulating performance and the like is formed on the surface of a to-be-treated sample through the hard anodizing electrochemical reaction. Solution compositions are simple and stable, operation is convenient, and cost is low. A guarantee is provided for parts with special requirements in the fields of aviation, spaceflight, shipbuilding and the like.

Description

technical field [0001] The invention belongs to the aluminum alloy hard anodization technology, and in particular relates to a hard anodization process method of 7050 ultra-thick aluminum alloy. Background technique [0002] The development and engineering application of domestic high-strength and high-toughness aluminum alloy super-standard pre-stretched plates closely revolves around the model design requirements, and on the premise of new materials and new processes that have a certain domestic development and application basis, the rigidity of 7050-T7451 thick plates is carried out Research on the performance of various anodizing processes to achieve domestic independent guarantee of key materials. [0003] A certain type of aircraft selected high-strength and high-toughness ultra-thick plate 7050T7451 in the process of aircraft design, with a thickness of 130mm for hard anodization. However, the current domestic 7050 aluminum alloy does not have such a thick plate, and ...

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Problems solved by technology

[0003] A certain type of aircraft selected high-strength and high-toughness ultra-thick plate 7050T7451 in the process of aircraft design, with a thickness of 130mm for hard anodization. However, the current domestic 7050 aluminum alloy does not have such a thick plate, and the hard anodization of such materials Neither is the craft

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