Method and composition for dissolving deposits of magnetite

摘要: A process for dissolving deposits of metal oxides, and preferably iron oxides including magnetite without materially impairing the surface on which reside, comprises contacting solid oxide with a liquid medium composition comprising (1) an alkali borohydride, (2) chelating agent forms complex oxide, said being dialkali salt polyalkylene polyamine tetraalkanoic acid. The is particularly effective dissolution Fe 3 O 4 (magnetite) entrapped in tube-to-tube sheet crevices nuclear steam generators.