海水及培养基中假单胞菌对45钢电化学腐蚀行为的影响

中国腐蚀与防护学报

2013, Vol. 33

Issue (6): 481-490

研究论文

本期目录 | 过刊浏览

海水及培养基中假单胞菌对45钢电化学腐蚀行为的影响

柴柯罗琦吴进怡

海南大学材料与化工学院海南优势资源化工材料应用技术教育部重点实验室海口 570228

Effect of Pseudomonas on Electrochemical Corrosion Behavior of S45C Steel in Seawater and a Culture Medium

CHAI Ke, LUO Qi, WU Jinyi

Ministry of Education Key Laboratory of Application Technology of Hainan Superior Resources Chemical Materials, Material and Chemical Engineering College, Hainan University, Haikou 570228, China

全文: PDF(3762 KB)

摘要: 采用微生物分析、失重法、自腐蚀电位、EIS、动电位极化曲线和SEM等手段对比研究了45钢在无菌海水、无菌培养基、假单胞菌海水和假单胞菌培养基4种不同环境下的腐蚀行为。结果表明：腐蚀初期假单胞菌及培养基均对45钢有缓蚀作用。但随着时间的推移，假单胞菌新陈代谢作用引起了氧浓差腐蚀，且其代谢产物中的碱及铁载体的局部堆积加速了45钢的腐蚀。培养基环境对微生物腐蚀有促进作用。

关键词 ： 45钢, 微生物腐蚀, 假单胞菌, 极化曲线, 电化学阻抗谱

Abstract：The effect of pseudomonas on electrochemical corrosion behavior of 45 carbon steel was comparatively studied in seawater and a culture medium with and without the presence of pseudomonas, by means of microbiological analysis, weight loss method, corrosion potential measurements, EIS, potentialdynamic polarization curve and SEM, etc. The results showed that both pseudomonas and the medium exhibited inhibiting effect for the steel. Organic compounds in the medium could be absorbed onto steel surface and change the cathodic and anodic reaction of the corrosion process. The mechanisms of the effect of pseudomonas on corrosion behavior varied with immersing time: at the initial stage, the dissolved oxygen concentration in the environment was reduced by bacteria metabolism, which slowed down the corrosion rate. By prolonging the corrosion time, however, the partly quantitative accumulation of pseudomonas metabolites, which include alkaline substances and siderophores, finally accelerated the corrosion rate of the steel. Rich nutritious contents in the medium could promote mass propagation of pseudomonas, thus accelerated the influence of pseudomonas on corrosion behavior.

Key words： 45 carbon steel microbiologically induced corrosion pseudomonas polarization curve electrochemical impedance spectroscopy

收稿日期: 2013-03-19

ZTFLH:

TG172.5

基金资助:国家自然科学基金项目 (50761004，51161007和51261006) 及海南省自然科学基金项目 (510204和511112) 资助

通讯作者: 吴进怡，E-mail：wujinyi1976@aliyun.com

作者简介: 柴柯，男，1972年生，讲师，研究方向为热带海洋气候下金属的生物腐蚀与防护

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引用本文:

柴柯, 罗琦, 吴进怡. 海水及培养基中假单胞菌对45钢电化学腐蚀行为的影响[J]. 中国腐蚀与防护学报, 2013, 33(6): 481-490.
CHAI Ke, LUO Qi, WU Jinyi. Effect of Pseudomonas on Electrochemical Corrosion Behavior of S45C Steel in Seawater and a Culture Medium. Journal of Chinese Society for Corrosion and protection, 2013, 33(6): 481-490.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2013/V33/I6/481

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