Sealing treatment method for aluminum alloy anode oxide film

An anodic oxide film and treatment method technology, applied in the field of sealing, can solve the problems of loss of sealing effect, easy corrosion of oxide film, etc., and achieve the effect of improving corrosion resistance and wear resistance

Inactive Publication Date: 2015-08-12
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the rare earth sealing method, like boiling water sealing, dichromic acid sealing, and nickel fluoride, is susceptible to corrosion when the oxide film is slightly damaged. At the same time, some sealing materials may be rinsed in a humid environment and lose their sealing. Effect

Method used

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  • Sealing treatment method for aluminum alloy anode oxide film
  • Sealing treatment method for aluminum alloy anode oxide film
  • Sealing treatment method for aluminum alloy anode oxide film

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specific Embodiment

[0030] Test 1: Phosphate sealing. Using Al(H 2 PO 4 ) 3 The solution is sealed, the Al(H 2 PO 4 ) 3 The solution synthesis method is: weigh a certain amount of H 3 PO 4 Solution and heated to 85 ° C, according to the ratio of the amount of substances Al / P = 1:3, to H 3 PO 4 Slowly add solid Al(OH) into the solution 3 , and stirred until solid Al(OH) 3 completely dissolved to form Al(H 2 PO 4 ) 3 solution, and then use deionized water to prepare Al(H 2 PO 4 ) 3 The solution is diluted, and the diluted Al(H 2 PO 4 ) 3 The mass fraction of the solution is 10%. Next, the prepared Al(H 2 PO 4 ) 3 The solution was evenly brushed on the aluminum alloy anodized film, and placed in the air to cure for 12 hours, and then the Al(H 2 PO 4 ) 3 The aluminum alloy anodized film of the solution was heat-treated at 20-250°C for 30 minutes, then air-dried naturally, and then the prepared Al(H 2 PO 4 ) 3 The solution is evenly brushed onto the aluminum alloy anodized ...

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Abstract

The invention discloses a sealing treatment method for an aluminum alloy anode oxide film. The sealing treatment method for the aluminum alloy anode oxide film is high in sealing effect and high in timeliness. The sealing treatment method comprises the following steps of preparing soluble phosphate solution; uniformly brushing the soluble phosphate solution on the aluminum alloy anode oxide film; curing the soluble phosphate solution in air; performing heat treatment on the aluminum alloy anode oxide film for a period of time at the temperature of 150-350 DEG C; naturally cooling down the aluminum alloy anode oxide film after the aluminum alloy anode oxide film is subjected to heat treatment; uniformly brushing the prepared phosphate solution on the aluminum alloy anode oxide film again; curing the phosphate solution for a period of time in air; performing heat treatment on the aluminum alloy anode oxide film for a period of time at the temperature of 150-350 DEG C; and repeating the steps twice to eight times so as to form a compact phosphate coating on the surface of the aluminum alloy anode oxide film. By the phosphate coating, the corrosion resisting property, the wear resistance and the timeliness of the aluminum alloy anode oxide film can be improved obviously. The sealing treatment method for the aluminum alloy anode oxide film is suitable to be popularized and used in the technical field of sealing.

Description

technical field [0001] The invention relates to the technical field of hole sealing, in particular to a method for sealing holes of aluminum alloy anodized film. Background technique [0002] Pure aluminum is soft and ductile, but its strength is low, limiting its application where higher strength is required. For this reason, some alloying elements are usually added in the industry to obtain aluminum alloys with different properties. Aluminum alloy has the advantages of high specific strength, excellent thermal conductivity, good corrosion resistance and good plasticity. In addition, the high temperature performance, formability and surface treatment performance of aluminum alloy are also relatively good. It is a non-ferrous metal with excellent comprehensive performance. Metal. Therefore, aluminum and its alloys have been widely used in various fields such as aerospace, automobiles, construction, bridges, ships, chemicals, packaging, machinery and equipment, and their us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/18
Inventor 张鲲陈辉宁淑红刘艳董立新骆晓伟
Owner SOUTHWEST JIAOTONG UNIV
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