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Application of the Electrochemical Noise Method with Three Electrodes to Monitor Corrosion and Environmental Cracking in Chemical Plants  

Ohtsu, Takao (Mizushima Plant, Mitsubishi Chemical Corporation)
Miyazawa, Masazumi (Mizushima Plant, Mitsubishi Chemical Corporation)
Ebara, Ryuicluro (Graduate School, Hiroshima Institute of Technology)
Publication Information
Corrosion Science and Technology / v.7, no.3, 2008 , pp. 173-178 More about this Journal
Abstract
Recently an electrochemical noise method (ENM) with three electrodes has gained attention as a corrosion monitoring system in chemical plants. So far a few studies have been carried out for localized corrosion and environmental cracking of chemical plant materials. In this paper the ENM system is briefly summarized. Then an application of ENM to general corrosion for chemical plant materials is described. The emphasis is focused upon the analysis of stress on the corrosion cracking process of austenitic stainless steel in 30% $MgCl_2$ aqueous solution and the corrosion fatigue crack initiation process of 12 Cr stainless steel in 3% NaCl aqueous solution by ENM. Finally future problems for ENM to monitor regarding corrosion and environmental cracking in chemical plants are discussed.
Keywords
electrochemical noise method; general corrosion; stress corrosion cracking; corrosion fatigue; corrosion monitoring;
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