Detection of Stress Corrosion Cracking in a Dual-Phase Steel Using Electrochemical Noise and Impedance Spectroscopy
Por:
Carpintero-Moreno E.J., Gonzalez-Rodriguez J.G., Uruchurtu-Chavarin J., Rosales I., Campillo B., Leduc-Lezama L.
Publicada:
1 ene 2013
Resumen:
An attempt has been made to detect the stress corrosion cracking (SCC)
initiation and propagation of a dual-phase steel in 3.5% sodium
chloride (NaCl) solution at different pH values (3 and 7) by using
electrochemical noise (EN) and electrochemical impedance spectroscopy
(EIS) techniques during slow strain rate tests. When the steel was
immune to SCC, EN readings consisted of transients with high intensity
and frequency, which did not change throughout the tests; Nyquist
diagrams showed a single depressed capacitive-like semicircle; and Bode
plots did not show the presence of a protective layer. On the other
hand, when the steel was susceptible to SCC, current-noise-time series
consisted of transients that increased in intensity and frequency at the
yielding point but decreased toward the final fracture; Nyquist diagrams
indicated a process controlled by diffusion of aggressive ions through a
corrosion products layer; and Bode plots showed evidence of the
existence of a protective layer.
Filiaciones:
Carpintero-Moreno E.J.:
Universidad Autonoma del Estado de Morelos-CIICAP, Av. Universidad 1001, Col. Chamilpa, 62209-Cuernavaca, Mor, Mexico
Gonzalez-Rodriguez J.G.:
Universidad Autonoma del Estado de Morelos-CIICAP, Av. Universidad 1001, Col. Chamilpa, 62209-Cuernavaca, Mor, Mexico
Uruchurtu-Chavarin J.:
Universidad Autonoma del Estado de Morelos-CIICAP, Av. Universidad 1001, Col. Chamilpa, 62209-Cuernavaca, Mor, Mexico
Rosales I.:
Universidad Autonoma del Estado de Morelos-CIICAP, Av. Universidad 1001, Col. Chamilpa, 62209-Cuernavaca, Mor, Mexico
Campillo B.:
Univ Nacl Autonoma Mexico, Fac Quim, Mexico City 04510, DF, Mexico
Leduc-Lezama L.:
TERNIUM-HyLSA, Monterrey, Nuevo León, Mexico
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