Blackening/black oxide finishing of iron, steel, cast iron, copper and zinc die-cast alloys
Between nothing and something, but pitch-black and rust protecting, on all iron materials without changing the dimensions - that is steel blackening with ZWEZ-Black. A technology that has been known for decades, and – through continuous further development – commands an important role in surface treatment processes even today. The ZWEZ R&D department has played an important part in this innovation.
ZWEZ-Black today offers:
In principle there are similar processes for pitch-black finishing of copper and zinc alloys.
Special products for pre- and post-treatment optimise these processes: