Anvils allow you to rename items, repair enchanted items, and even combine the enchantments from different items, at the cost of experience points. Crafting. You'll need 3 blocks of iron, plus 4 more iron bars, for a total of 31 iron bars.
Passivation is the treatment of the surface of stainless steels, often with acid solutions (or pastes), to remove contaminants and promote the formation of the passive film on a freshly created surface (e.g. through grinding, machining or mechanical damage).
How do I know if my parts are successfully passivated? Some people associate the light surface etch that can occur from nitric acid with passivation. In contrast, the appearance of the parts is not typically changed by passivation with CitriSurf.