... aluminum alloy, extra super duralumin alloy, cast aluminum alloy, AL-Si series10.The quality of film has been proved; it ... Reduce thickness of plating layer, save rare metal 20-25% so as to lower production cost14.Greatly improve smooth finish, compactness ... , extra super duralumin alloy, cast aluminum alloy, AL-So series aluminum alloy, AL-Mg series aluminum alloy and other special aluminum alloy17 ...