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Investigation into the Hot salt corrosion of CrAl, CrNiMn and MnAl steels
Author(s) -
Bombara G.,
Felli F.,
Bernabai U.
Publication year - 1982
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19820330903
Subject(s) - metallurgy , corrosion , manganese , materials science , alloy , metal , salt (chemistry) , chemistry
The hot salt corrosion behaviour in a KCl · K 2 SO 4 · Fe 2 O 3 melt at 755 °C has been investigated as a function of alloy composition for three groups of refractory steels: 24Cr1.3Al, 27Cr12Ni(4 or 6)Mn and (20: 33)Mn(7 : 10)Al. Mn. Al‐steels with a maximum Mn‐content of 30% and CrNi6Mn‐steels displayed a marked superiority in corrosion resistance in terms of weight loss as well as depth of internal deterioration. The protective mechanism of manganese is apparently related to its high‐rate uniform segregation to the metal/melt interface inhibiting internal sulphidation along preferential paths.