Decorative anodized aluminum and aluminum alloy material on the higher requirements. Generally only pure aluminum, aluminum, aluminum magnesium, aluminum-manganese alloy can be dyed with more vivid colors. For silicon, iron higher alloy, the resulting oxide film darker and can only be dyed with dark colors. Aluminum and aluminum parts for decorative anodized aluminum, the selection should pay attention to the following points:First: For parts that require a mirror-like appearance, the aluminum content must be chosen to be higher than 99. 99% of high-purity aluminum or 5A66 aluminum-magnesium alloy. Part of the chemical or electrochemical polishing of sulfuric acid anodizing can be colorless, transparent, bright film, can be dyed with a variety of bright colors.Second: For the requirements of the appearance of the lower brightness than the above parts, you can choose the aluminum content is higher than 99. 9% industrial high-purity aluminum and LT65 LT67 aluminum-magnesium alloy.Third: For the general requirements of decorative parts, other components of aluminum and its impurities have a maximum allowable content,Fourth: Certain aluminum alloys should be heat treated using sound specifications. The size of the grain of the oxide film structure and properties have a certain impact. Coarse grains in the oxidation reaction uneven, often appear orange peel appearance. Therefore, it is generally desirable that aluminum have a finer grain structure.Fifth: the appearance of the selected aluminum should not have serious scratches, defects and inclusions. Will affect the oxide film appearance and corrosion resistance.