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Coloring stainless steel (anodizing)

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Can someone please direct me into achieving coloring stainless steel (anodizing). I need to know what equipment to use and how to go about processing it. Thank you in advance.

Yours truly,

MUI THEN
- Delta, BC, Canada


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Stainless steel does not anodize like ti or niobium, it is called inco-colouring and is usually done with heat and moisture. Oven heating at a certain temperature with a certain amount of humidity will colour stainless steel.

Jeff Swayze
- Kelowna, B.C.


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Jeff,

Regarding Inco-colouring of stainless steel, how colorfast is the application for exterior applications? Thanks, Mike

Michael Liu Taylor
   specialty stainless steel distributor
Dallas, Texas


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Actually, there is a proprietary method sold by one of the advertisers at this site. Look for Prismatic. Color is jet black.

James Watts
- Navarre, Florida

misc. plating stuff
For Sale cheap



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A coating on stainless steel may be achieved by an electro-chemical process, which creates a super-thin layer of chrome oxide. However, coloring 17-4 stainless steel is somewhat unpredictable, and better results may appear on 304 and 316 stainless steels. In theory, this procedure works best when the metal has been electropolished and demagnetized. In my experience, I have gotten different results, varying from drastic variation of tonalities from sample to sample (from brown to fainted black), to unevenness hues on one piece.

Instead, would black-oxide work for your application?

Clinton Tharp
- Avilla, Indiana


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Well, the layer of colouring on the stainless steel is approximately 20-30 angstroms thick,(the usual thickness of chromium oxide on most well passivated stainless), so if the parts are not abraded or in contact with corrsive environments, the colouring should remain intact. Perhaps if you used a clear aftercoat, the colouring will be protected from environmental damage. Which grade of stainless are you referring to, and what is the application? Will the parts be ornamental , or will they be handled regularly? Your results will be dependent on your application, as the colouring can easily be abraded, or etched away in relatively corrosive atmospheres.

Good luck!

Jeff Swayze
- Kelowna, B.C., Canada


May 13, 2008

please let me know what process is used to colour 304 stainless. Can I do it myself?

Theunis Pretorius
knives - Kempton Park, Gauteng, South Africa


June 13, 2011

Clinton Tharp, would you share your process and chemicals with me. I just want to color code 302 stainless steel pins, 22 gauge, 21 gauge and 20 gauge that are 3/4 inch long. So my pot or volume required is minimal and since my volumes are very small, it is not worth going outside for the process.

Mike Dalton
- Skokie, Illinois, USA

January 24, 2012

Q. I WANT TO GIVE BROWN COLOR ON STAINLESS STEEL 304 BY DIPPING INTO A CHEMICAL (BY CURRENT OR WITHOUT CURRENT). PLEASE ALSO TELL ME , WHAT OTHER COLORS CAN BE OBTAINED ON STAINLESS STEEL BY DIPPING INTO SOME CHEMICALS.

REGARDS

Shahzad Amin
- Gujranwala, Pakistan

April 27, 2012

Q. Most people are talking about using only 18SWG thick SS 304 or 316 material. Can this be done on 202 grade material which is 24SWG thick?

Visweswaran Manickam
- Trichy, India

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