Métodos de formar um segundo revestimento protetor e de formar um revestimento protetor branco, e, artigo de manufatura.

摘要

Using aqueous electrolytes containing complex fluorides or oxyfluorides such as fluorozirconates and fluorotitanates, ferrous metal articles and non-metallic articles having a first coating containing aluminum may be rapidly anodized to form a second protective surface coating. White coatings may be formed on articles using pulsed direct current or alternating current.