We are using Vulcanium titanium racks for chromic acid anodizing and phosphoric acid anodizing of aluminum alloys.
When we receive new racks, we observed the original color of titanium racks would change to blue or purple after the first run Somehow the color would disappear after second or third run.
Why did this happen? Shold I try a new supplier. In eBay, I found a supplier for titanium racks