| 摘要 |
Gaseous nitrogen oxides generated at the time of dissolution of the mandrel wire of a filament coil can be accurately removed by adding an inhibitor for generation of gaseous nitrogen oxides to a resolving solution comprising nitric acid, water and at least one member selected from sulfuric, hydrochloric and phosphoric acids for dissolving the mandrel wire. Examples of said inhibitor are an oxidizing agent composed of an inorganic peroxide such as permanganic acid salt or perchloric acid salt and inorganic or organic reducing agents. |
