Microbial corrosion of high manganese austenitic steel by a sulfate reducing bacterium dominated by extracellular electron transfer and intergranular effect
Zixuan Xu , Tingyue Gu , Yunhu Ding , Renyang He , Yi Fan , Tiansui Zhang , Huihai Wan , Ying He , Yunqing Xiong , Hongfang Liu
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引用次数: 0
Abstract
Microbiologically influenced corrosion (MIC) of high manganese steel (25Mn) by a marine sulfate reducing bacterium (SRB) was systematically investigated. Mn²+ enhanced SRB activity by H₂S detoxification. The culture medium with low carbon source increased MIC by 2.1 times. 4 % Cr in 25Mn provided partial passivation. Riboflavin and nano-magnetite injections validated the dominant contribution of extracellular electron transfer mechanisms. Electron backscatter diffraction showed the intergranular corrosion at austenite boundaries. SRB enhanced hydrogen permeation and decreased tensile strength by 21 %. This study identifies the primary mechanism of 25Mn and provides important insights into material design and corrosion mitigation.
期刊介绍：
Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies.
This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.
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