Electrochemical noise analysis of weld joint of 316 stainless steel in scc test

Electrochemical noise analysis of weld joint of 316 stainless steel in scc  test

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Part of #Electrochemical noise analysis of weld joint of 316 stainless steel in scc test# :

Publishing year : 2007

Conference : The 10th National Congress on Corrosion of Iran

Number of pages : 7

Abstract: Electrochemical Noise, EN, has attracted too much attention in recent years for monitoring localized corrosion. In this study, electrochemical current and potential noises of weld joints of the 316S.S exposed to acidified 25% MgCh solution at 90 C using a Slow Strain Rate Test were investigated. Crack initiation and its subsequent propagation by means of SCC current and potential noise patterns, during crack growth were studied. A three-electrode set up was used to detect the noise. Current was measured between two similar electrodes and the potential was measured between working electrode and aPt wire used as reference electrode. Results were analyzed in time domain and fractured surfaces were studied using scanning electron microscopy (SEM). A good relation was recognized between the fluctuations of the current and potential with the initiation and propagation of cracks during the SCC of the specimens that can be used for SCC monitoring.