Detection of SCC by the simultaneous use of electrochemical noise and acoustic emission measurements

Leban, Mirjam Bajt; Bajt,; Kovač, J.; Legat, Andraž

doi:10.1016/b978-008044635-6.50081-9

Cited by 2 publications

(3 citation statements)

References 22 publications

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“…They elucidated the criteria when using noise resistance and spectral noise resistance, and they also investigated the influence of electrode asymmetry on EN results. For applied research, the most attractive application of EN is corrosion process monitoring such as pitting corrosion, 21,22,[75][76][77][78] stress corrosion cracking (SCC), [79][80][81][82] microbiological corrosion 32,33,83 and atmospheric corrosion. [84][85][86] Initial work looked at the electrochemical potential noise (EPN) 4,87,88 ; subsequently, it was realised that electrochemical current noise (ECN) could also be studied.…”

Section: Introductionmentioning

confidence: 99%

Detection of corrosion degradation using electrochemical noise (EN): review of signal processing methods for identifying corrosion forms

Xia

Shi

Behnamian

2016

Corrosion Engineering, Science and Technology

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Electrochemical noise (EN), as one of the most promising in situ electrochemical methods in corrosion and electrochemical science, has been developing rapidly in recent years with the advancements in instrumentation and signal processing methods. One advantage of EN is its application in long-term or early stage corrosion process monitoring because it instantly detects corrosion rate and corrosion forms. Investigators have applied various mathematical methods to extract characteristic parameters from EN. In this paper, identifying corrosion forms using parameters obtained from time domain, frequency domain and time-frequency domain is reviewed, and the correlation between parameters and corrosion forms is discussed. Finally, other in situ techniques are recommended to be employed synchronously with EN measurement in order to obtain reliable analyses.

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Section: Introductionmentioning

confidence: 99%

Detection of corrosion degradation using electrochemical noise (EN): review of signal processing methods for identifying corrosion forms

Xia

Shi

Behnamian

2016

Corrosion Engineering, Science and Technology

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“…The changes in the amplitude and frequency of the potential and the current transient are the results of the breakdown of the passive film followed by the initiation and propagation of SCC. By combining electrochemical noise and acoustic emission techniques is possible to distinguish between damage stages with a predominant electrochemical contribution and damage stages with a predominant mechanical contribution to crack propagation, therefore with these two techniques is possible obtaining a reliable detection of SCC 13,16 . However, there is few studies in low carbon steels 19,20 .…”

Section: Another Technique Is the Electrochemical Noise (En)mentioning

confidence: 99%

“…The current noise can provide real-time evaluation of stress corrosion cracking (SCC) behavior in austenitic stainless steel 12,13 , nickel-based alloy 14,15 , martensitic stainless steel 11 and aluminum alloys 17,18 . The changes in the amplitude and frequency of the potential and the current transient are the results of the breakdown of the passive film followed by the initiation and propagation of SCC.…”

Section: Another Technique Is the Electrochemical Noise (En)mentioning

confidence: 99%

Electrochemical Noise for Detection of Stress Corrosion Cracking of Low Carbon Steel Exposed to Synthetic Soil Solution

2017

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In the last years, electrochemical noise (EN) has demonstrate that is capable of detect the initiation of cracks during the slow strain rate tests (SSRT). In this research, EN has been used as a tool to detect stress corrosion cracking (SCC) in low carbon steel (X52) exposed to a synthetic soil solution called NS4 at room temperature with pH of 5, 8 and 10. The electrochemical potential and current noise were measured simultaneously during SSRT. Relation between EN and SCC process was analyzed. EN readings of current consisted of transients with high intensity and frequency during all SSRT tests. EN readings of potential at the maximum strength (UTS) and before fracture, increase intensity and amplitude of the transients, attributed to beginning of cracking. Localized index (LI) values indicate a mix corrosion type (general and localized corrosion) during SSRT tests. According to SCC index obtained from mechanical properties, it is clear that X52 steel has low SCC susceptibility. Scanning electron microscopy (SEM) observations were carried out in the fracture surface and longitudinal sections. The specimens tested in NS4 solution with pH 5 were the most likely to present SCC, additionally in this condition a brittle fracture with transgranular appearance was observed.

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Detection of SCC by the simultaneous use of electrochemical noise and acoustic emission measurements

Cited by 2 publications

References 22 publications

Detection of corrosion degradation using electrochemical noise (EN): review of signal processing methods for identifying corrosion forms

Detection of corrosion degradation using electrochemical noise (EN): review of signal processing methods for identifying corrosion forms

Electrochemical Noise for Detection of Stress Corrosion Cracking of Low Carbon Steel Exposed to Synthetic Soil Solution

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