Salt bath composition containing alkali nitrate for oxidizing iron metal for improving corrosion resistance of iron metal

摘要

A salt bath compsn., contg. nitrate anions and sodium and opt. potassium cations, used at 320-550 degrees C for surface oxidn. of esp. nitrided ferrous metal parts to increase their corrosion resistance, includes 0.1-5 (pref. 0.5-1.75) wt.% lithium cations substituting sodium or potassium cations.