Electrochemical Noise Analysis Application to the Monitoring Technology of Atmospheric Stress Corrosion Cracking

摘要

Stress corrosion cracks initiation can be detected by an electrochemical noise analysis (ENA) method. The electrode potential of the specimen is continuously measured by using the reference electrode in the sodium chloride solution. When a stress corrosion crack occurs, it can be detected by potential decrease. A stress corrosion crack initiation to propagation process, such as initiation of the micro-crack, the individual crack to progress, coalessence, and steady state propagation is separated based on the change of potential. Also, we can measure the potential inside the bittern spot for the case of high humidity sodium atmospheric condition. Stress corrosion cracking can be detected by monitoring of the potential even in the atmosphere.