Nitrite producing bacteria inhibit reinforcement bar corrosion in cementitious materials.

ABSTRACT: Chemicals and synthetic coatings are widely used to protect steel against corrosion. Bio-based corrosion inhibition strategies can be an alternative in the arising bioeconomy era. To maintain the good state of steel reinforcement in cracked concrete, microbe-based self-healing cementitious composites (MSCC) have been developed. Yet, proposed strategies involve reasonably slow crack filling by biomineralization and thus risk the possible rebar corrosion during crack healing. Here we upgrade the rebar protection to a higher level by combining MSCC with microbial induced corrosion inhibition. Presented NO₃^- reducing bacterial granules inhibit rebar corrosion by producing the anodic corrosion inhibitor NO₂^- and meanwhile heal a 300-µm-wide crack in 2

SUBMITTER: Ersan YC 

PROVIDER: S-EPMC6148264 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature