Gordon England Surface Engineering Forum



Re: Tungsten Carbide onto Titanium


Posted by Gordon England on July 22, 2003 at 13:09:28:

In Reply to: Tungsten onto Titanium posted by John Carleton on July 22, 2003 at 09:38:09:

: Can you tell me is a Nickel based Tungsten Carbide Coating resistant to hydrochloric acid up to 5% entrained in gas, which is 15% carbon monoxide, 30% carbon dioxide, 40% nitrogen, 2-3% carbonyl sulphide and sulphur dioxide. This is to be sprayed onto a Titanium substraight to resist abrasion. Working temp only 80 C.

: Thanks for your help in advance

John

I would have doubts about the corrosion resistance of HVOF WC/Ni coatings in this environment, certainly without testing first. Also, consider WC/20Cr/7Ni.

Chromium carbide/nickel chromium (or NiCrMo matrix preferably) may a bit more corrosion resistant, but will have lower abrasion resistance. Again, I would advise testing.

Plasma sprayed alumina or chromium oxide coatings should not be effected by this environment, but you would have to check whether they are mechanically suited.

Regards Gordon


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