| Literature DB >> 35630285 |
Xiao Lan1,2,3, Jie Zhang1,2,3, Zaifeng Wang4, Ruiyong Zhang1,2,3, Wolfgang Sand5,6,7, Liang Zhang4, Jizhou Duan1,2,3, Qingjun Zhu1,2,3, Baorong Hou1,2,3.
Abstract
To study the abnormal failure of magnesium anodes for buried pipelines in marine engineering in the unique environment of mudflats, a strain of a sulfate-reducing prokaryote (SRP) was isolated from pipe-laying soil, and identified as Desulfovibrio sp. HQM3. Weight-loss test, electrochemical measurements, SEM, EDS, XRD, and CLSM techniques were used to study the effect of corrosion on the AZ31B magnesium alloy. Under the influence of SRP, the magnesium alloy corroded severely at rates up to 1.31 mm/year in the mudflat environment. SRP accelerated corrosion by 0.3mm/year. Pitting occurred on the samples in both abiotic and biotic systems. The pitting depth reached 163.47 μm in the biotic system after 14 days. The main composition of a petal-like corrosion product was Mg(OH)2. The results show that a mudflat environment can lead to an accelerated corrosion of magnesium alloys.Entities:
Keywords: Microbiologically Influenced Corrosion; electrochemical impedance spectroscopy; magnesium alloy; mudflat environment; sulfate–reducing prokaryotes
Year: 2022 PMID： 35630285 PMCID： PMC9145540 DOI： 10.3390/microorganisms10050839
Source DB: PubMed Journal: Microorganisms ISSN： 2076-2607