Black steel

kindly providing me a suggestion for converting cold rolled sheet(low carbon steel) into black steel sheet without any painting and coating as well.

Ajeet Anand
product designer - Allahabad,(u.p.)&India
February 24, 2011

Hi, Ajeet.

I think you are looking for what is called "black oxidizing" in the USA. In India I think it is often called "blackodizing". It consists essentially of immersion in a hot aqueous oxidizing solution like caustic and nitrates. Search this site for "black oxide" and you will find a good deal of info on the process. Good luck.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.
February 25, 2011

Hi AJIT,

I think hot annealing the cold rolled sheets in hot furnace with carbon black feed stock oil result in black sheet.

RAJESH OJHA
- JODHPUR, RAJASTHAN, India
April 21, 2011

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