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Home> Industry Information> black aluminum alloy machining

black aluminum alloy machining

March 21, 2019

[China Aluminum Network] Because of the special properties of aluminum, the electroplating of aluminum Die Casting Parts requires special pre-treatments. These pre-treatments need to be adjusted due to different aluminum materials and different parts. Process. Therefore, for the workers engaged in the plating of aluminum die-casting parts, sometimes need to do the test of the plating pretreatment of the die-casting aluminum parts. To carry out this kind of test, the first is the selection of the pretreatment process and the design of the improved method.

The electroplating pretreatment of die-cast aluminum parts/aluminum alloy die castings includes four important processes, such as degreasing, acid etching, electroless plating or displacement plating, and preplating. The key is electroless plating or displacement plating. Therefore, the tests that are often done are Concentrate on this process. Of course different aluminum and different processing methods have different requirements on the pre-treatment, such as the pre-processing of die-cast aluminum parts and rolled aluminum parts are very different, and even the same processing method Different aluminum materials also have different pretreatment processes. For example, the amount of copper contained in aluminum directly affects the binding force of the coating. The pretreatment scheme for plating of aluminum die-cast parts is also a systematic comparative test. The sample is treated differently before the selected treatment process, and then the same electroplating process is performed, and then the binding force is tested. The point of this comparative test is to ensure that in addition to the differential process point, other processes are the same conditions, otherwise There is no comparability and no evaluation can be made.

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