不同纯金属的细菌粘附和腐蚀行为由硫酸盐还原细菌诱导
Huihai Wan1, Guoqing Wang1, Tiansui Zhang1
1Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, PR China.
Biofouling
|June 5, 2024
概括
硫酸盐降解细菌 (SRB) 在海水中显著腐蚀了铁和,但对和的影响很小. 在铁和表面上,SRB的附着性更高,与腐蚀增加相关.
科学领域:
- 材料科学与工程 材料科学与工程
- 微生物学 微生物学
- 腐蚀科学 腐蚀科学
背景情况:
- 已知硫酸盐降解细菌 (SRB) 在各种环境中加速金属腐蚀.
- 了解纯金属对SRB引起的腐蚀的不同易受性对于材料选择和保护策略至关重要.
研究的目的:
- 为了研究和比较纯铁 (Fe), (Ni), (Mo) 和 (Cr) 的腐蚀行为,当暴露于硫酸盐降解细菌 (SRB) 在丰富的人造海水 (EASW).
- 为了将腐蚀程度与金属表面上的微生物粘附程度相关联.
主要方法:
- 四种纯金属 (Fe,Ni,Mo,Cr) 在用SRB接种的EASW中进行了14天的化.
- 进行了减重测量以量化腐蚀.
- 测定金属表面的细胞数量,以评估细菌粘附度.
主要成果:
- 铁 (Fe) 和 (Ni) 的重量显著下降,分别为1.96 mg cm-2和1.26 mg cm-2.
- (Mo) 和 (Cr) 的最小减重分别为0.05 mg cm-2和0.03 mg cm-2.
- 与Mo (2.2 × 106 细胞 cm−2) 和Cr (1.4 × 106 细胞 cm−2) 表面相比,在Fe (4.0 × 107 细胞 cm−2) 和Ni (3.1 × 107 细胞 cm−2) 表面上观察到较高的静止细胞数量.
结论:
- 铁和在海水条件下极易受到硫酸盐降解细菌引起的腐蚀.
- 和对SRB介导的腐蚀具有优越的抗性.
- 细菌粘附在测试金属之间观察到的不同腐蚀速率中起着重要作用.
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