Affiliation:
1. North China Electric Power University - Baoding Campus
2. North China Electric Power University
Abstract
Abstract
In this study, corrosion behavior of Q235 carbon steel (CS) under Bacillus cereus (B. cereus) inoculum in simulated cooling water was evaluated. Weight loss study proved B. cereus inoculum possessed anti-corrosion efficiencies of 92.84% and 73.88% for 3 d and 14 d rotation tests respectively. The electrochemical measurements indicated added B. cereus inoculum increased the charge transfer resistance and reduced corrosion current density. The B. cereus cells with strong biofilm-forming capacity were able to adhere onto Q235 CS surface to form compact biofilms and cause biomineralization. Surface characterization analysis demonstrated the presence of B. cereus inoculum reduced the amount of Fe2O3 and simultaneously increased the amount of CaCO3 in corrosion products. The corrosion inhibition mechanisms of B. cereus inoculum involve forming biofilm, generating biomineralized layer, and consuming dissolved oxygen. Thus, B. cereus inoculum provides a biological strategy for the industrial cooling water anti-corrosion application.
Publisher
Research Square Platform LLC