Forming method and structure of aluminum alloy surface interference film

A technology of aluminum alloy surface and interference film, which is applied in the direction of surface reaction electrolytic coating, anodic oxidation, electrolytic coating, etc., can solve the problem of inability to produce interference film with different colors at multiple angles, and achieve the effect of increasing ornamental

Inactive Publication Date: 2013-08-21
可成科技(苏州)有限公司
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Problems solved by technology

[0003] Furthermore, the current practice is to carry out electrolytic coloring of aluminum-based metal substrates by means of alternating current, and directly add nickel salt to the second anolyte to produce color. This kind of anodic oxide film of colored aluminum cannot be produced Multi-angle different colors of interference film

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  • Forming method and structure of aluminum alloy surface interference film
  • Forming method and structure of aluminum alloy surface interference film
  • Forming method and structure of aluminum alloy surface interference film

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Embodiment Construction

[0028] Firstly, an aluminum alloy workpiece is provided. The aluminum alloy workpiece can be a shell or a rod of any device, such as an outer shell of an electronic product, a body of a bicycle, or a small decorative metal piece.

[0029] Next is step 20, pre-treating the aluminum alloy workpiece to clean its surface; referred to as "pre-treatment" process, which includes at least five sub-processes;

[0030] Step 30, anodizing the aluminum alloy workpiece for a predetermined time until an oxide film with a plurality of tracheid micropores is formed on the surface; referred to as "anodizing" process;

[0031] Step 40, expand the oxide film of the aluminum alloy workpiece with an acidic solution to expand the pore diameter of the tracheid micropores; referred to as the "pore expansion" process, this process does not need to be powered;

[0032] Step 50, energizing pore reaming treatment to expand the bottom of the tracheid micropores and form a deposition area; referred to as "...

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Abstract

The present invention provides a forming method and a structure of an aluminum alloy surface interference film. The forming method comprises at least the following steps: providing an aluminum alloy workpiece; carrying out a pretreatment on the aluminum alloy workpiece so as to clean the surface of the workpiece; carrying out an anode treatment on the aluminum alloy workpiece for a predetermined time until the surface forms an oxidation film with a plurality of tracheid-like micropores; adopting an acid solution to carry out a hole expansion treatment on the oxidation film of the aluminum alloy workpiece to expand the pore size of the tracheid-like micropore; carrying out an electrifying hole expansion treatment so as to expand the bottom of the tracheid-like micropore and form a deposition zone; depositing a specific metal in the deposition zone of the tracheid-like micropore to form an interference structure; carrying out a hole sealing treatment on the tracheid-like micropore with a hole sealing agent; and removing ash. With the present invention, an aluminum alloy surface interference film structure is formed by using the method.

Description

technical field [0001] The invention relates to a method for forming an interference film on the surface of an aluminum alloy and its structure, in particular to a method for forming an interference film structure on the surface of an aluminum alloy by electrolysis based on anodic treatment and its structure. Background technique [0002] The formation of firm decorative colors on metal shells has been extensively researched and applied, among which anodizing is a common method. However, anodizing can usually only form one color on the metal shell, which gradually fails to meet the novel and changing appearance requirements. [0003] Furthermore, the current practice is to carry out electrolytic coloring of aluminum-based metal substrates by means of alternating current, and directly add nickel salt to the second anolyte to produce color. This kind of anodic oxide film of colored aluminum cannot be produced Multi-angle different colors of the interference film. [0004] In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04C25D11/24C25D11/20C25D3/12
Inventor 胡少刚赖锋儒陈慧珊
Owner 可成科技(苏州)有限公司
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