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A composite fuzzy function model was developed to predict the corrosion resistance of duplex stainless steel in two environment; a biotic environment containing single-type corrosion-related bacteria iron reducing bacteria and a control, abiotic synthetic seawater environment. Based on this model, it was predicted that the fuzzy probability of resistance to corrosion for duplex stainless steel in the biotic environment is lower than that of the abiotic environment. To validate the model, stress corrosion testing (slow strain rate test) was conducted on duplex stainless steel samples in these environments. The obtained results validated the predicted results by the model as measured by change of important mechanical features of duplex stainless steel in these environments such as time-to-failure and reduction in area. This is a phenomenological rather than a mechanistic approach to examine the suitability of use of fuzzy logic in such applications.
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Javaherdashti et al. (2012) studied this question.
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