Gravity-driven corrosion effects in microbiologically influenced corrosion: Circumferential corrosion distribution of 90/ 10 Cu-Ni alloy by Desulfovibrio vulgaris

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-05-19 DOI:10.1016/j.corsci.2025.113049

Congrui Zhu , Yanan Pu , Zihao Guo , Yue Hou , Su Hou , Fan Feng , Bo Zhang , Caichang Dong , Delin Tang , Shougang Chen

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Abstract

This work systematically examined the impact of gravity on Desulfovibrio vulgaris deposition, biofilm formation, and microbiologically influenced corrosion (MIC) behavior on 90/10 copper-nickel (Cu-Ni) at different clock positions (6 P, 9 P, and 12 P). Gravity exerted a significant influence on biofilm formation and the severity of MIC on 90/10 Cu-Ni alloy. The circumferential corrosion distribution on the inner surface of alloy pipeline exhibited substantial positional variation, with the most severe corrosion occurring at 6 P. Under static incubation conditions, the D. vulgaris sessile cell count at 6 P was 28 % higher than 12 P, and the weight loss at 6 P reached 8.6 ± 0.5 mg/cm², which was 1.3-fold and 1.7-fold greater than that at 9 P and 12 P, respectively. The thickness of D. vulgaris biofilm and MIC progression followed the trend: 6 P > 9 P > 12 P. Under dynamic incubation conditions, the differences in MIC across the positions diminished due to shear stress modulating the development of the D. vulgaris biofilm. Stirring mitigated gravitational effects, promoting a more uniform D. vulgaris biofilm distribution and MIC rate.

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微生物影响腐蚀中的重力驱动腐蚀效应：普通脱硫弧菌对90/ 10 Cu-Ni合金的环向腐蚀分布

本研究系统地研究了重力对不同时钟位置（6 P、9 P和12 P）上90/10铜镍（Cu-Ni）沉积、生物膜形成和微生物影响腐蚀（MIC）行为的影响。重力对90/10 Cu-Ni合金生物膜的形成和MIC的严重程度有显著影响。合金管道内表面的周向腐蚀分布呈现明显的位置变化，在6 P处腐蚀最为严重。在静态培养条件下,d .寻常的固着在6 P细胞计数28 %高于12 P,和减肥6 P达到8.6 ±0.5  毫克/平方厘米,1.3倍和1.7倍大于9 12 P, P和。结果表明：6 P >； 9 P >； 12 P。在动态孵育条件下，由于剪切应力调节了D. vulgaris生物膜的发育，不同位置的MIC差异减小。搅拌减轻了重力效应，促进了龙井草生物膜的均匀分布和MIC率。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

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.