Abstract
The effect of methanogenic archaea (Methanococcus maripaludis) on corrosion behavior of 316L stainless steel under different concentrations of organic electron donor (acetate) was investigated. The results showed that M. maripaludis can survive by utilizing 316L SS as an alternative energy source. The extracellular electron transfer from 316L SS relies on redox-active substances secreted by M. maripaludis. Corrosion of 316L SS is promoted along with decrease of acetate concentration. M. maripaludis causes severe pitting corrosion of 316L SS in the absence of acetate due to that more redox-active substances are secreted, which has little relationship with the M. maripaludis biofilm.
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