High silicon aluminum alloy anodic oxidation method and equipment thereof

Abstract

The invention discloses a high silicon aluminum alloy anodic oxidation method and equipment thereof. The method comprises the steps as follows: A, after a high silicon aluminum alloy die casting is subjected to oil removing, abrasive water jet polishing treatment is performed; B, the polished high silicon aluminum alloy die casting is placed in a prepared anodic bath solution, rectangular wave pulse voltage is used for performing an anodic oxidation reaction, and the anodic oxidation reaction is stopped after an anodic oxidation film layer reaches a preset thickness; and C, after the high silicon aluminum alloy die casting with the anodic oxidation film layer is subjected to water washing and dyeing, hole sealing treatment is performed, so that a finished product is obtained. According to the method, pretreatment, anodic oxidation reaction and post treatment technologies of the anodic oxidation reaction of the high silicon aluminum alloy die casting are modified, so that the oxidation layer which is uniform, high in dimensional accuracy, compact and attractive is formed on the surface of the prepared high silicon aluminum alloy die casting; and compared with a conventional technology, the processing technology is more environment-friendly, the processing cost is lower, and large-scale industrial production can be realized more easily.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a high-silicon aluminum alloy anodic oxidation method and equipment thereof. Background technique [0002] Anodization of extruded pure aluminum alloy is a mature surface treatment technology, but the anodized film layer on the complex structure surface of high-silicon die-casting aluminum with this technology and equipment often has poor appearance such as color difference and macula, which cannot achieve uniform appearance of the film layer and large size. Precision, high hardness requirements, more difficult to achieve automatic production, so the US military standard MIL-A-8625F3. inconsistent color)". On the other hand, the easy die-casting of high-silicon aluminum alloys has led to the rapid development of die-casting companies, and the performance of the anodized film layer of high-silicon die-cast aluminum has become a bottleneck for the die-casting indus...

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Problems solved by technology

[0007] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a high-silicon aluminum alloy anodizing method and its equipment, aiming at solving the problem of uneven oxide film layer, low hardness and poor appearance in the anodization of high-silicon die-casting aluminum. And other issues

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