• D. vulgaris corrosion of the pipeline joint is regionally selective. • D-amino acids slightly decrease the selectivity of D. vulga ris corrosion. • Glutaraldehyde inhibits the localized corrosion of the pipeline joint by D. vulgaris . • D-amino acids and glutaraldehyde synergistically inhibit the D. vulgaris corrosion. • The corrosion style of pipeline joint is general corrosion in the GA + D-mix medium. In this work, the effects of D-amino acids and glutaraldehyde on Desulfovibrio vulgaris ( D. vulgaris ) corrosion of X80 steel pipeline joint were scientifically investigated. The results demonstrated that the D. vulgaris corrosion of the pipeline joint exhibited regional selectivity. D-amino acids inhibited the D. vulgaris biofilm development, and glutaraldehyde killed the D. vulgaris cells. With the introduction of D-amino acids or glutaraldehyde, the localized corrosion degree and the selectivity of D. vulgaris corrosion mitigated. Under their combined action, optimal antibacterial performance was achieved, and the corrosion pit depth of pipeline joints decreased from 7.5 μm to 2-3 μm. This study offered a more effective and environmentally sustainable mitigation approach to pipeline joint corrosion.
Wang et al. (Wed,) studied this question.