Open AccessRegularities of Stress-Corrosion Cracking of Pipe Steel 09G2S at Cathodic Polarization in a Model Soil Environment
Author(s) -
L.I. Nyrkova,
P.E. Lisovy,
L.V. Goncharenko,
S.O. Osadchuk,
В.А. Костін,
А. V. Klymenko
Publication year - 2021
Publication title -
fìzika ì hìmìâ tverdogo tìla
Language(s) - English
Resource type - Journals
eISSN - 2309-8589
pISSN - 1729-4428
DOI - 10.15330/pcss.22.4.828-836
Subject(s) - materials science , cathodic protection , metallurgy , hydrogen embrittlement , corrosion , stress corrosion cracking , cracking , pearlite , environmental stress fracture , ferrite (magnet) , embrittlement , dissolution , anode , composite material , austenite , microstructure , electrode , chemistry
Peculiarities of corrosion-mechanical fracture of 09G2S pipe steel samples in the conditions of cathodic protection were investigated. It was established that depending on the level of protective potential, stress-corrosion cracking of pipe steel of a ferrite-pearlite class 09G2S can occur by different mechanisms. The range of protective potentials was determined, at which the anodic dissolution and hydrogen embrittlement occur simultaneously during the fracture of steel, namely from -0.85 V to -1.0 V. The existence of the above mechanisms is confirmed by the change in the strength and viscosity properties of the steel and the morphology of the fractures. For steels of other manufacturing technology and grades, these potential areas may differ.