DH36 钢在产酸细菌 Citrobacter farmeri 存在下的腐蚀行为

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Pub Date : 2023-11-30 DOI:10.5006/4430

Yangmei Chen, Xiaoyan He, Hailong Zhang, Gang Chen, Xiuqin Bai

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引用次数: 0

摘要

该研究旨在为海洋工程钢 DH36 在 Citrobacter farmeri 诱导下的腐蚀行为和腐蚀动力学提供基础知识。本研究分析了 DH36 在不同腐蚀体系中的腐蚀产物组成、腐蚀形态、电化学信息和失重情况。结果表明，随着浸泡时间的延长，在 Citrobacter farmeri 悬浮液中浸泡的腐蚀产物比在人工海水中浸泡的更致密。在浸泡初期，DH36 在农家柠檬杆菌悬浮液中的均匀腐蚀率高于在人工海水中的均匀腐蚀率，但随着时间的推移，均匀腐蚀率有所下降。DH36 在人工海水中主要经历均匀腐蚀。相比之下，DH36 样品在 Citrobacter farmeri 悬浮液中表现出明显的缝隙腐蚀，导致最大坑深达到 5.720 μm。此外，DH36 在人工海水和 Citrobacter farmeri 悬浮液中的重量损失可分别用幂函数公式 D=0.0006t0.9579 和 D=0.0007t0.7247 来描述。这项研究阐明了在海洋环境中，Citrobacter farmeri 的存在诱导 DH36 发生一般腐蚀和点腐蚀的基本机制。

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Corrosion behavior of DH36 steel in the presence of acid-producing bacterium Citrobacter farmeri

The work aims to provide a basis knowledge of corrosion behavior and corrosion kinetics of ocean engineering steel DH36 induced by Citrobacter farmeri. This study analyzed the corrosion product composition, corrosion morphology, electrochemical information, weight loss of DH36 in various corrosion systems. The results indicated that with the extension of soaking time, the corrosion products soaked in Citrobacter farmeri suspension were denser than those soaked in artificial seawater. At the initial immersion stage led to a higher uniform corrosion rate of DH36 in Citrobacter farmeri suspension compared to that in artificial seawater, which subsequently decreased over time. DH36 experienced primarily uniform corrosion when immersed in artificial seawater. In contrast, DH36 samples in Citrobacter farmeri suspension exhibited significant crevice corrosion, resulting in a maximum pit depth of 5.720 μm. Furthermore, the weight loss of DH36 in artificial seawater and Citrobacter farmeri suspension could be described by the power function formula D=0.0006t0.9579 and D=0.0007t0.7247, respectively. This study elucidates the fundamental mechanisms through which the presence of Citrobacter farmeri induces general and pitting corrosion of DH36 in a marine environment.

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来源期刊

Corrosion MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

2.80

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： CORROSION is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control. The scope of the journal includes the latest developments in areas of corrosion metallurgy, mechanisms, predictors, cracking (sulfide stress, stress corrosion, hydrogen-induced), passivation, and CO2 corrosion. 70+ years and over 7,100 peer-reviewed articles with advances in corrosion science and engineering have been published in CORROSION. The journal publishes seven article types – original articles, invited critical reviews, technical notes, corrosion communications fast-tracked for rapid publication, special research topic issues, research letters of yearly annual conference student poster sessions, and scientific investigations of field corrosion processes. CORROSION, the Journal of Science and Engineering, serves as an important communication platform for academics, researchers, technical libraries, and universities. Articles considered for CORROSION should have significant permanent value and should accomplish at least one of the following objectives: • Contribute awareness of corrosion phenomena, • Advance understanding of fundamental process, and/or • Further the knowledge of techniques and practices used to reduce corrosion.