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Surface processing agent for aluminum alloy and surface processing method for aluminum alloy

A surface treatment agent and aluminum alloy surface technology, applied in the coating process of metal materials, etc., can solve the problems of corrosion resistance, deterioration of surface characteristics, and difficult adhesion of chemical treatment film

Inactive Publication Date: 2010-12-29
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With such a situation, it is known that the surface properties of A1-Mg-based and Al-Mg-Si-based aluminum alloy materials used in automobiles deteriorate, especially the degreasing properties during chemical conversion treatment, and the adhesion of the chemical conversion treatment film is difficult. Impact on corrosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0039] The treatment (contact treatment) of bringing the above-mentioned test material (the aluminum alloy plate produced as described above, that is, the aluminum alloy plate whose water immersion performance deteriorated) into contact with the surface treatment agent for aluminum alloys of the present invention was performed. At this time, as the surface treatment agent, the hydrogen phosphate-containing aqueous solution shown in the treatment preparation column of Tables 1 to 4 was used. The concentrations are shown in the treatment concentration columns of Tables 1-4. The contact treatment was carried out by immersing the test material in a surface treatment agent (aqueous solution). The contact (immersion) time is shown in the contact time column of Tables 1-4. In addition, the above-mentioned aqueous solutions (surface treatment agents) all correspond to examples of the present invention.

[0040] The test material after the above-mentioned contact treatment was washed...

example 2

[0048] A part of the test material (the aluminum alloy plate produced above, that is, the aluminum alloy plate with deteriorated water immersion property) was pickled, washed with water, and dried. The degreasing treatment and the degreasing evaluation test were performed in the same manner as in the case of the aforementioned preparation and test A. The results (water immersion area ratio) are shown in the column of water immersion (after treatment) in Table 5.

[0049] As shown in this column, the test material after the above-mentioned acid sea street had a water immersion area ratio of 95% in the degreasing property evaluation test, and the degreasing property was at a sufficiently good level.

[0050] The test material after pickling, water washing, and drying was exposed to a humid environment of 50° C. and 95% RH for 1 week or 2 weeks. With respect to the test material after this exposure, the degreasing treatment and the degreasing property evaluation test were perfor...

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PUM

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Abstract

A surfactant for aluminium alloy and a method for processing surface of the aluminium alloy are disclosed, which can recover the properties of surface of the aluminium alloy experiencing aging deterioration, in addition, the properties of surface of the aluminium alloy is difficult to be aging-deteriorated even in case that the surface is not coated with oil after recovery and preserved in a special circumstance whose temperature and humidity are uncontrollable. (1) A surfactant for aluminium alloy for recovering the properties of surface of the aluminium alloy experiencing aging deterioration, wherein is composed by water solution comprising hydrophosphate, (2) concentration of hydrophosphate in the water solution is 0.01 to 20g / litre, (3) a method for processing surface of the aluminiumalloy, wherein contacts the surfactant with the surface of the aluminium alloy experiencing aging deterioration.

Description

technical field [0001] The technical field of the present invention relates to a surface treatment agent for aluminum alloys and a surface treatment method for aluminum alloys, and in particular to a surface treatment agent for aluminum alloys and a surface treatment method for aluminum alloys for recovering the degreasing properties of the aging-deteriorated aluminum alloy surface In particular, it belongs to a surface treatment agent for aluminum alloys and a surface treatment method for aluminum alloys used in pursuit of improvement in degreasing properties during degreasing treatment before chemical conversion treatment of aluminum alloy sheets for automobiles, especially for automobile panels. Background technique [0002] The gist described in JP-A-02-115385 is that “Aluminum alloys such as 5000-series and 6000-series are used for aluminum alloy plates such as automotive panel materials, and in order to improve the formability of these aluminum alloys, heat treatment, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/05
CPCC23C22/07C23C22/82
Inventor 小林宣裕大胁武史井户秀和
Owner KOBE STEEL LTD