TY - JOUR
T1 - Analysis of the dynamics of Intergranular corrosion process of sensitised 304 stainless steel using recurrence plots
AU - García-Ochoa, E.
AU - González-Sánchez, J.
AU - Acuña, N.
AU - Euan, J.
PY - 2009/5/1
Y1 - 2009/5/1
N2 - This study presents the assessment of the dynamics of intergranular corrosion of austenitic stainless steel with different degrees of sensitization through the analysis of electrochemical current noise signals. Samples of S30400 stainless steel were aged at 923 K for 50, 250 and 1,000 min before being quenched in water. The double Loop Electrochemical Potentiokinetic Reactivation test was applied to assess the degree of sensitization. The electrochemical noise data were analysed using a novel mathematical tool named Recurrence Plots (RP). This method allowed us to assess the dynamics of the intergranular corrosion process of the steel in a H2SO4 + KSCN solution at room temperature. The study was conducted using a recurrence quantification analysis (RQA) from which it was possible to determine the percent of recurrence (%R), the percent of determinism (%D) and the information Entropy of the corrosion process. It was found that these parameters increased with the sensitisation intensity, which indicates that sensitisation induced a more deterministic dynamics on the electrochemical process.
AB - This study presents the assessment of the dynamics of intergranular corrosion of austenitic stainless steel with different degrees of sensitization through the analysis of electrochemical current noise signals. Samples of S30400 stainless steel were aged at 923 K for 50, 250 and 1,000 min before being quenched in water. The double Loop Electrochemical Potentiokinetic Reactivation test was applied to assess the degree of sensitization. The electrochemical noise data were analysed using a novel mathematical tool named Recurrence Plots (RP). This method allowed us to assess the dynamics of the intergranular corrosion process of the steel in a H2SO4 + KSCN solution at room temperature. The study was conducted using a recurrence quantification analysis (RQA) from which it was possible to determine the percent of recurrence (%R), the percent of determinism (%D) and the information Entropy of the corrosion process. It was found that these parameters increased with the sensitisation intensity, which indicates that sensitisation induced a more deterministic dynamics on the electrochemical process.
KW - Electrochemical noise
KW - Recurrence plots
KW - Sensitisation
KW - Stainless steel
UR - http://www.scopus.com/inward/record.url?scp=64949123282&partnerID=8YFLogxK
U2 - 10.1007/s10800-008-9702-4
DO - 10.1007/s10800-008-9702-4
M3 - Artículo
AN - SCOPUS:64949123282
SN - 0021-891X
VL - 39
SP - 637
EP - 645
JO - Journal of Applied Electrochemistry
JF - Journal of Applied Electrochemistry
IS - 5
ER -