Method of anodizing and sealing aluminum

摘要

The disclosure relates to a method of sealing the surface of an aluminum member, such as an aluminum foil, from the environment by first placing the foil in an H2SO4 bath to form an oxide which normally will not provide a total seal of the aluminum from the environment and then placing the aluminum member with oxide thereon in an H3PO4 bath to close the pores in the oxide layer and provide sealing of the aluminum from the environment. This process also passivates the silicon.