Can someone tell me what is the metal used for electrolysis needles?
Stainless steel - nickel alloy, I believe - and gold plated nickel stainless.
Where do I start? Stainless Steel is a “low Carbon” steel with Chromium added (at least 10% or more).
Adding the Chromium gives the steel it’s corrosion resistance. There are more than 60 grades of Stainless with varying amounts of Chromium, Carbon, Molybdenum, nickel and other elements. The higher the Chromium percentage and lower Carbon percentage will provide more corrosion resistance.
The addition of Nickel provides for better “machining” of a particular grade of Stainless but is not a requirement. Not all grades contain Nickel.
Hope this helps, Probeman.