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john hutchison's avatar

Old technology is priceless so muchofit is lost its y area since childhood basicaly your on your own as the new stuff takes over I only now a few who has passion for this I know most of them great work bob in getting into this

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Tony Jaboney's avatar

Great presentations and those are some very remarkable patterns on the surfaces of those spheres. That said, If these spheres are made from Chromium containing Stainless Steel and there is a lot of plasma discharges happening in between those two surfaces there might be a considerable chance of Chromium VI forming in the vapor mixture especially when Stainless Steel is exposed to (be it very localized) high temperature plasma discharges.

https://en.wikipedia.org/wiki/Hexavalent_chromium

Chromium VI is not a substance you want to have in exhaust gasses in any circumstances. Also working with stainless steel be it grinding or welding generates considerable amounts of this oxidized state of chromium which is highly carcinogenic. Not many people who work with metal know this and consider stainless steel "more difficult to weld" but are not informed that the welding vapors released by stainless steel are in fact, highly toxic.

You've mentioned that nickel containing alloys might generate Nickel Tetracarbonyl when exposed to Carbon monoxide under very specific circumstances, thanks never heard of that one before. But Chromium VI is more readily and easily produced at a wide array of circumstances and temperatures, and if I read correctly on the Wikipedia page, even in high temperature catalytic circumstances involving steam.

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