Interesting. HCL and alcohol are very reactive, in my experience, the alcohol evaporates quickly, concentrating the effects of the HCL, making it very corrosive. HCL is extremely prone to after-rustng, no doubt why Angier noted that neutralization was necessary. Possibly this is mitigated somewhat by the Bismuth oxychloride, which is essentially an inert white pigment. But, my experience with it was on Damascus and Twist, with solutions containing alcohol creating a thicker coat that is harder to etch. It may be totally suitable for Fluid Steel. If you try it, please post the results.
A temp drop of short duration is no big deal. You can actually achieve the conversion simply by pouring boiling water over tubes in a non heated container, but it requires several changes of boiling water.
Honestly, IMO, you're chasing the wrong rabbit down the wrong hole, and I recommend you go back to the methodology of your first test, but using the appropriate steel samples. I predict you will be successful.
What type of tubes does your Powell have?
Last edited by Ken61; 03/06/17 01:04 PM.
