What are the disadvantages of blanks made of two grades of aluminum? How to deal with?

[China Aluminum Network] For the general anodizing process, parts made of different brands can still be anodized normally, but the appearance of the obtained film will be different with different brands, if it is a decorative piece Then explain to relevant personnel in advance and correct it in advance if necessary. For protection-based ones, these factors need not be taken into consideration. After the workpiece is anodized, two-color or three-color (tricolor including electrode material) oxide films will appear. For this reason, the requirements should be put forward in the design, that is, using the same brand of material and solder, no need to use brand aluminum when machining, so that the above phenomenon can be avoided.