Posted by Gordon England on August 28, 2003 at 22:32:58:
In Reply to: Material Suitability posted by John Carleton on August 27, 2003 at 10:04:26:
: Hi Gordon/all,
: How good do you think HVOF nickel chrome carbide would be against 400 C TiCl4 gas (Ticle). The reason I ask is that a recent trial appears to have washed away the coating. I'm now thinking of the Hvof tungsten bonded in nickel
: Many thanks for your help
: John
Hi John
Not too sure on this one. Titanium tetrachloride is a liquid at room temperature. In itself not too corrosive. In presence of moisture HCl is formed which is very corrosive. At elevated temperatures I think it becomes far more corrosive.
What is the function of the coating?
Are we talking about pure TiCL4 gas or are there other chemicals involved?
If the chromium carbide/nickel chromium was corroded away, I doubt whether WC/Ni would be any better. If it is purely a wear problem, then it may be worth trying.
Regards Gordon
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