Nitric acid oxidizes the steel to +3 ions, but only in minute amounts, ordinarily undetectable in the pure acid as a result of chemical equilibrium of the response. Even so, the ions are removed from the equilibrium by hydrochloric acid, forming AuCl−four ions, or chloroauric acid, thereby enabling more oxidation: https://sergiorwcg96395.blgwiki.com/793545/zahngold_verkaufen_tipps_und_informationen_zum_zahngoldankauf