Influence of <i>Bacillus subtilis</i> on the corrosion resistance of B30 copper-nickel alloy and the biomass-regulated mineralization mechanism.

ABSTRACT: This study investigates the corrosion inhibition behavior of Bacillus subtilis on B30 copper-nickel alloy in seawater, focusing on its biomass components in regulating biomineralization. Results show that B. subtilis formed a protective biofilm and induced the precipitation of a uniform biomineral layer, mainly composed of Ca-Mg carbonates. This layer acted as a physical barrier, resulting in a low corrosion current of (5.85 ± 0.08) × 10⁻⁷ A/cm² and reducing the maximum pit depth from 44.74 to 18.54 µm. Furthermore, the roles of different biomass components, such as bacterial cells, extracellular polymeric substances (EPS), and soluble microbial products (SMPs), were also investigated. It was found that all components could initiate mineralization, but with distinct outcomes:

SUBMITTER: Lv M 

PROVIDER: S-EPMC12838447 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature