Fuzzy Prediction of Corrosion Resistance of Duplex Stainless Steel to Biotic Iron Reducing bacteria and Abiotic Synthetic Seawater Environments: A Phenomenological Approach towards a Multidisciplinary Concept

摘要

A composite fuzzy function model was developed to predict the corrosion resistance of duplexstainless steel in two environment; a biotic environment containing single-type corrosion-relatedbacteria iron reducing bacteria and a control, abiotic synthetic seawater environment. Based on thismodel, it was predicted that the fuzzy probability of resistance to corrosion for duplex stainless steel inthe biotic environment is lower than that of the abiotic environment. To validate the model, stresscorrosion testing (slow strain rate test) was conducted on duplex stainless steel samples in theseenvironments. The obtained results validated the predicted results by the model as measured by changeof important mechanical features of duplex stainless steel in these environments such as time-to-failureand reduction in area. This is a phenomenological rather than a mechanistic approach to examine thesuitability of use of fuzzy logic in such applications.