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Pitting, Crevice and stress corrosion resistance of high chromium und molybdenum alloy stainless steels

✍ Scribed by Dr. M. B. Rockel; Dipl.-Ing. M. Renner

Publisher
John Wiley and Sons
Year
1984
Tongue
German
Weight
405 KB
Volume
35
Category
Article
ISSN
0947-5117

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✦ Synopsis

Abstract

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.

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