Method of treating nonferrous metal surfaces by means of an acid activating agent and an organophosphate or organophosphonate and substrates treated by such method

摘要

A method of treating a nonferrous metal substrate such as aluminum with an acid activating agent such as HF followed by treating with an organophosphate or organophosphonate. The treatment provides for improved adhesion and flexibility as well as resistance to humidity, salt spray corrosion and detergents of subsequently applied coatings.