Abstract
Sulphur corrosion for nickel alloy 718 was monitored by electrochemical noise under high temperature. Cross-recurrence quantification analysis (CRQA) on potential and current noise signals was used to characterise the stable coupling interaction between them. Diagnosis criterion for stable pitting started was proposed based on the CRQA parameter determinism per cent trajectory. The proposed method displayed accurate and robust characteristics compared to the common localisation index.
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