Manufacturing method of aluminum alloy oxide film, aluminum alloy oxide film and aluminum alloy products
A production method and aluminum alloy technology, which is applied in the field of metal materials, can solve problems such as easy cracking, discoloration, and exposure of aluminum alloy substrates, and achieve the effects of improving corrosion resistance and wear resistance, and improving impact resistance
Active Publication Date: 2021-05-28
HENAN YUZHAN PRECISION TECH CO LTD
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However, the oxide film produced by this process is formed by the reaction of the aluminum alloy, that is, it is formed by "growth" transformation from the surface of the aluminum substrate outward. At the corners, edges and corners, due to the sharp expansion of the surface area, the oxide film is affected. Under tension, cracks are likely to occur, resulting in the peeling off of the oxide film; the cracks expose the aluminum alloy substrate, and in some extreme chemical environment tests (such as artificial sweat tests), the corrosion resistance in some areas, especially the area where the film layer is cracked Insufficient, corrosion, discoloration, and oxide film peeling will occur; and the high temperature resistance of the oxide film is poor. Experiments show that when the temperature exceeds 90°C in a dry environment, the original complete oxide film may crack.
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[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0033] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intervening element at the same time. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present.
[0034] Unless otherwise defined, all technical and scientific terms used here...
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Abstract
A method for manufacturing an oxide film, comprising: boosting stage: placing a metal substrate in an electrolyte solution, slowly increasing the voltage to V1, and the voltage rising speed ranges from 15V / min to 25V / min; high voltage stage: maintaining Voltage V1, the first electrochemical oxidation is performed on the metal substrate, and a porous layer with adsorption holes is formed on the surface of the metal substrate; step-down stage: slowly drop the voltage to V2, and the range of the voltage drop rate is 8V / min ~ 11V / min; low voltage stage: keep the voltage V2, perform a second electrochemical oxidation on the metal substrate to form a barrier layer with enhanced pores, and obtain the oxide film; wherein, the enhanced pores are formed on the the bottom of the adsorption hole. The invention also provides an oxide film and a metal product with the oxide film.
Description
technical field [0001] The invention relates to the field of metal materials, in particular to a method for manufacturing an aluminum alloy oxide film, an aluminum alloy oxide film and an aluminum alloy product. Background technique [0002] At present, the existing aluminum alloy anodic oxidation process is mainly a porous anodic oxidation treatment process, that is, a uniform porous oxide film is formed on the surface of the aluminum alloy by means of electrochemical reaction. Due to the porous structure of the film layer, dyes, functional The non-toxic material is deposited into the pores, giving the product a colorful appearance that is more aesthetically pleasing and durable. However, the oxide film produced by this process is formed by the reaction of the aluminum alloy, that is, it is formed by "growth" transformation from the surface of the aluminum substrate outward. At the corners, edges and corners, due to the sharp expansion of the surface area, the oxide film is...
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IPC IPC(8): C25D11/04
CPCC25D11/04
Inventor 张乐朱志扬赵军舰王鑫郭晓燕刘福莲武晓飞
Owner HENAN YUZHAN PRECISION TECH CO LTD