Researchers engineered a living Citrobacter sp. MICI21 biofilm on copper that outcompeted the corrosive sulfate-reducing bacterium Oleidesulfovibrio alaskensis G20 and formed a dense, mechanically cohesive barrier. The MICI21-dominated biofilm limited sulfide ingress and pitting and produced substantially greater corrosion resistance, supporting microbiome engineering as a potential strategy for living, adaptive coatings.
