Hole sealing method of anodic oxidation coloring for aluminum alloy parts used in ocean environment

Abstract

The invention provides a hole sealing method of anodic oxidation coloring for aluminum alloy parts used in an ocean environment. The method comprises the steps of, firstly, carrying out the anodic oxidation on the aluminum alloy parts, wherein the anodic oxidation time is 60-90 minutes, and a membrane layer thickness is 30-40 micrometers after the anodic oxidation is completed; cleaning the aluminum alloy parts subjected to the anodic oxidation by flowing water; coloring is carried out after the cleaning, and the coloring time is 10-15 minutes; washing and drying the colored aluminum alloy parts by the flowing water; soaking and sealing the dried aluminum alloy parts, wherein the technical formula of the soaking solution comprises of 4-7 g / L of a high-temperature sealing agent CX-300; 1-2g / L of cobalt acetate; 5.4-6.0 of the pH value; 85-95 DEG C of the soaking temperature and 10-15 minutes of the soaking and hole sealing time; and finally, washing and cleaning the aluminum alloy parts subjected to the hole sealing in the step 3 with absolute ethyl alcohol under normal temperature, and standing for 10-20 minutes, then coating uniformly the inner surface and the outer surface of the aluminum alloy parts at the normal temperature a layer of liquid waterproof polishing wax, and polishing a wax layer, and then obtaining the aluminum alloy parts with the colored hole sealing afterdrying at the normal temperature. The hole sealing method of the anodic oxidation coloring for the aluminum alloy parts used in the ocean environment can remarkably improves the quality and the qualified rate of the anodic oxidation colored hole sealing of the aluminum alloy parts.

Description

technical field [0001] The present invention relates to the technical field of anodic oxidation process for surface treatment, in particular to a process method for anodizing, coloring and sealing holes of aluminum alloy parts used in marine environments. Background technique [0002] At present, the surface treatment process of anodic oxidation coloring (rose red or black and other colors) of aluminum alloy parts is as follows: anodizing of parts—flowing water washing—coloring—flowing water washing—drying—organic solvent sealing— -dry. [0003] Among them, anodizing time: (50-60) min, wash with running water after oxidation; coloring: coloring time: (10-15) min, wash with running water after coloring, soak the parts in solution after drying (process formula: 1 liter Add 30-50g nitrocellulose to ethyl acetate), soak for (3-5) min, take out after soaking, and dry; the thickness of the film layer generally reaches 20 μm. [0004] However, in the assembly process of the alumi...

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Problems solved by technology

[0004] However, during the assembly process of aluminum alloy parts treated with this method, a large number of discoloration and discoloration occurred after wiping the surface with 99.7% absolute ethanol, and the appearance quality did not meet the process requirements, resulting in a large number of product repairs

[0005] In addition, because the part is used in the marine environment, but there is no public report on the influence of the marine environment on the anodizing and coloring process of aluminum alloy parts. The anodized coloring effect of alloy parts is also affected, and the problem of color fading is prone to occur