D. A. Rozentsev, O. A. Tropin, D. S. Renev, N. K. Tkachev, V. I. Zhuchkov, O. V. Zayakin.
ABSTRACT
The effect of the composition and time of anodic dissolution on the microstructure and morphology of ultraporous iron was studied by electrochemical dealloing (selective anodic dissolution) of iron-manganese alloys in a molten equimolar NaCl–KCl mixture. The possibility of electrochemical production of ultraporous iron in the percolation mode at a temperature of 700°C was established. The region of potentials for selective manganese removal in the indicated equimolar mixture is found. For the formation of a characteristic mutually continuous percolation structure of pores and ligaments, the holding time at a potential of 0.1 V is one hour. When dealing with ferromanganese with a Mn content of 33 wt %, manganese was etched out almost to the end, and ultraporous iron was obtained with more uniform pore and ligament sizes.
KEY WORDS:
anodic selective dissolution, dealloing, ferroalloy, chloride melt
DOI: 10.31857/S0235010621040071