aluminumhm

  An   aluminum anodized coil   differs from common aluminum rolls in an extra technical process called anodizing. This process generates an oxide film on the aluminum product surface under the corresponding electrolyte and specific process conditions due to the action of the applied current. If no specified explanation is added, anodized aluminium coils are usually obtained by the method of sulfuric acid anodizing as mentioned above. The technical features of acid anodizing are as below. Raw materials of the process must be pure and clean enough, or else the oxide film tend to mix with impurities and turn yellow. The layers of an  aluminum coil  roll might stick together during anodizing, making the surface of the oxide color uneven with rainbow colors and other poor marks. Failure in controlling technical steps leads to black or white aluminum coil surface and cooling bed. Too high electrolyte temperatures or too long electrolysis time causes deformation of the coil surface. In addit