Aiming at anodic oxidation of 5083 aluminum alloy casting plate to form the color difference of the ingot cross section

the influence of different casting temperatures and casting speeds on the oxidation color difference was compared by oxidation test

and the water-immersed ultrasonic C-scan testing equipment was applied to detect the flat ingot. Sampling at different locations

the defects were analyzed by optical microscope

scanning electron microscope and energy dispersing spectrometer. The results indicate that the color difference occurs in the range of 1/3 to 1/4 thickness layer of flat ingot

and there exists a larger degree of component segregation

massive metal compound and higher solid hydrogen content compared with the normal area.In addition

the color difference formed in the subsequent anodic oxidation process of the casting plate can be effectively reduced by increasing the casting temperature

reducing the casting speed and decreasing the hydrogen content of the solution appropriately

enhancing the yield rate.