配方类型:

METALS

配方说明:

Black Oxide Coating for Aluminum (U.S. Patnet 2,681,873)

配方组成:

Hydrochloric Acid/33.6
Sulfuric Acid/10.8
Sodium Alkylaryl Sulfonate/1.5
Water/280.0
Sodium Dichromate/27.1
Potassium Permanganate/27.1

配制方法:

Cleaned aluminum is dipped for 30 seconds to 3 minutes in this solution heated at 85 to 190'F.