An intelligent self-defensive coating based on sulfide ion responsive nanocontainers for suppression of microbiologically influenced corrosion induced by sulfate reducing bacteria
By Cai, Haoyuan; Wang, Peng; Zhang, Dun; Wang, Yu; Li, Ee
Published in Corrosion Science
2021
Abstract
S2―-responsive nanocontainers are constructed by assembling zeolitic imidazolate framework-8 onto hollow mesoporous silica nanoparticles. Spontaneous leakage of incorporated biocides is nearly restrained and release initiates when S2― is higher than 0.04 mM. Such nanocontainers can respond to S2― fluctuation derived from microbiologically influenced corrosion (MIC) induced by sulfate reducing bacteria (SRB). The protective performance of coating with smart nanocontainers is evaluated in SRB environment. It demonstrates the intelligent coating exhibits the fewest bacterial settlement, highest impedance (3.31 × 107 Ω cm2) and lowest corrosion current density (1.36 × 10−10 A cm−2) after 14-day immersion, revealing the optimal resistance to MIC.