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Pitting, Crevice and stress corrosion resistance of high chromium und molybdenum alloy stainless steels
Author(s) -
Rockel M. B.,
Renner M.
Publication year - 1984
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.19840351202
Subject(s) - crevice corrosion , metallurgy , molybdenum , materials science , alloy , pitting corrosion , corrosion , chromium , intergranular corrosion , stress corrosion cracking , chloride
This paper presents new data on the resistance of recently developed high‐alloy stainless steels to localised corrosion in chloride solutions. Pitting potential was determined in artificial sea water, and critical pitting temperature CPT in very aggressive FeCl 3 solution. Critical crevice corrosion temperature CCT was tested in the same FeCl 3 solution. Stress corrosion measurements, made in a more familiar NaCl solution by the drop evaporation method, demonstrate that alloy stainless steels with high chromium and molybdenum have very long failure times, comparable with those of nickel alloys found to be SCC‐resistant under practical conditions. Stainless steels of 20 Cr 25 Ni 6 Mo type showed the best resistance to localised corrosion.