Corrosion behavior of stainless steel types AISI 316L, 316Ti and 321 was studied at 750 0C in NaCl-KCl equimolar melts. Iron, chromium and manganese species constitute the major corrosion products. The following mechanism of stainless steel corrosion in molten chlorides was proposed: 1) chemical interaction between the alloy and the salt intensified by the formation of microgalvanic pairs; 2) formation of chromium and molybdenum carbide-containing phases in steel as a result of heating to 750 0C; 3) additional formation of galvanic pairs between the grains of austenitic alloys and the carbide phases at the grain boundaries resulting in enhanced intergranular corrosion.
Ilya B. Polovov, А. В. Абрамов, Kirill V. Dedov, В. В. Карпов, A. Yu. Zhilyakov, Alfiya F. Gibadullina, S. V. Belikov, Vladimir A. Volkovich, Oleg I. Rebrin
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