Appearance color control technology for chemical oxide film of thermal processing Al 5A06 materials
The heat treatment,argon arc welding and electron beam welding of Al 5A06 samples were designed and processed.SEM morphology analysis and energy spectrum analysis were carried out on the three samples,and the analysis results showed that the oxide film was generated on the surface of the samples by the three treatment methods,and the second phase was formed in the heat-affected zone and weld zone of the argon arc welding and electron beam welding samples.Firstly,30%hydrochloric acid was used to remove the oxide film on the surface of the three samples,and then HF acid and HNO3 acid was mixed by 1∶3 volume ratio to corrode the samples,the chemical oxidation treatment was lastly carried out on the samples,the results showed that the color of the oxide film on the three kinds of samples was basically the same.
hot processingaluminum 5A06chemical oxide filmcolor difference
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