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Hydrogen embrittlement of Microalloyed structural steels
Author(s) -
Vehovar L.
Publication year - 1994
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.19940450605
Subject(s) - materials science , microstructure , hydrogen embrittlement , metallurgy , carbide , microalloyed steel , hydrogen , cathodic protection , cracking , embrittlement , stress corrosion cracking , corrosion , composite material , austenite , electrochemistry , chemistry , organic chemistry , electrode
The effect of Cr, Mo, V, Nb, Mn, their carbides and different microstructures on the corrosion and hydrogen uptake of two fine‐grained microalloyed steel grades has been investigated. In practice, fine‐grained structural steels appear to be more or less susceptible to hydrogen induced cracking, probably because of various strong interactions between the absorbed hydrogen and the various alloying elements or their carbides, acting as traps. The effect of microstructure was examined by cathodic polarization, by measuring the reduction of area, and by SEM examination of the fracture surface. In addition, hydrogen permeation transients for one microalloyed steel grade and Armco iron were measured, and the resistance of both steel grades to sulphide stress‐cracking according to the NACE Standard TM‐01‐77 was also determined.