On the opportunity to use non-intrusive acoustic emission recordings for monitoring uniform corrosion of carbon steel and austenitic stainless steel in acid and neutral solutions

Contribution of acoustic emission to the understanding of sulfide stress cracking of low alloy steels

“…From the above results, the corresponding duration of SSC propagation was about [30][31][32][33][34][35] hours in the present experimental conditions. AE data that were detected in the crack area several hours before the final fracture was detected.…”

“…Among the possible in-situ methods, acoustic emission (AE) exhibits interesting potentialities for corrosion study and monitoring. Indeed, the detection possibility was established and good correlations were obtained between specific AE parameters and the amplitude of corrosion damage in various cases: stress corrosion cracking [12][13][14][15], abrasion or erosion corrosion [16], pitting corrosion [17][18][19][20][21][22][23][24], crevice corrosion [25][26][27], exfoliation corrosion [28], uniform 17] [29][30], and also to monitor cracking in sour media [31][32][33][34][35][36]. Weng et al [31] found a correlation between HIC damage evaluated by Crack Length Ratio (CLR) [37] and the AE cumulative energy level.…”

Acoustic Emission of Hydrogen Bubbles on the Counter Electrode during Pitting Corrosion of 304 Stainless Steel

“…With the characteristic of real-time and full-body scanning in structural integrity monitoring, Acoustic emission (AE) technique is usually favored in corrosion research. Up to now, a great number of AE findings have been reported in various corrosion types such as uniform, 1,2) pitting, 313) stress cracking corrosion, 14,15) crevice corrosion. 16) Regarding the AE reports in pitting corrosion, the most proposed mechanism for AE signal during pitting process is the evolution of hydrogen bubbles generated by corrosion products hydrolysis and acidification within the occluded pits.…”

Acoustic Emission Monitoring of Wet H2S Cracking of Linepipe Steels: Application to Hydrogen-Induced Cracking and Stress-Oriented Hydrogen-Induced Cracking

“…cumulative energy or cumulative number of events. Good correlations were obtained between specific AE parameters and amplitude of corrosion damage in various cases: stress corrosion cracking [11][12][13] , abrasion or erosion corrosion 14 , pitting corrosion [15][16][17] , crevice corrosion [18][19] , exfoliation corrosion 20 , and uniform corrosion in acid media 21 . Among the variety of mechanisms of deformation and damage that can generate AE, corrosion processes take a particular position.…”

“…Among the variety of mechanisms of deformation and damage that can generate AE, corrosion processes take a particular position. In such cases, the source of acoustic emission is often not the electrochemical corrosion driving force itself, but its consequence: bubble formation, crack propagation and modifications in corrosion products or deposits [11][12][13][14][15][16][17][18][19][20][21][22] , depending on whether corrosion is localized or uniform.…”