Blackening

Blackening produces a uniform deep-black layer on components made from ferrous materials which gives them a decorative appearance. It is performed by im-mersion in a boiling alkaline oxidizing salt solution.

Salts for blackening pre- and post-treatment products

Product	Application	Working temp. in °C
G19 / G22	Alkaline cleaner for hot degreasing prior to blackening	60 - 80
BEIZENTFETTER	For descaling and partial degreasing prior to blackening	RT
FERROBLACK^® MH	Blackening salt containing special additives for a wide range of application.	140 approx.
FERROBLACK^® HL	Especially suitable for blackening of brazed joints and copper-coated parts	140 approx.
STREICH-BRÜNIERBEIZE	A fluid product for brushing on or immersion at room tem-perature; ideal for repairs	RT