Corrosion effect of Bacillus cereus on X80 pipeline steel in a Beijing soil environment

被引：49
|
作者：
Wan, Hongxia [1 ]
Song, Dongdong [2 ]
Zhang, Dawei [1 ]
Du, Cuiwei [1 ]
Xu, Dake [1 ]
Liu, Zhiyong [1 ]
Ding, De [3 ]
Li, Xiaogang [1 ,4 ]
机构：
[1] Univ Sci & Technol Beijing, Ctr Corros & Protect, Beijing 100083, Peoples R China
[2] Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Guangdong, Peoples R China
[3] State Grid Corp China, Shaanxi Elect Power Res Inst, Xian 710048, Shaanxi, Peoples R China
[4] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China
来源：
BIOELECTROCHEMISTRY | 2018年 / 121卷
基金：
中国国家自然科学基金;
关键词：
X80 pipeline steel; Pitting; Biofilm; Bacillus cereus; NRB; SULFATE-REDUCING BACTERIA; IRON-OXIDIZING BACTERIA; CARBON-STEEL; OIL-FIELD; NITRATE; BIOFILM; BEHAVIOR; ALLOY; WATER; LICHENIFORMIS;
D O I：
10.1016/j.bioelechem.2017.12.011
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The corrosion of X80 pipeline steel in the presence of Bacillus cereus (B. cereus) was studied through electrochemical and surface analyses and live/dead staining. Scanning electron microscopy and live/dead straining results showed that a number of B. cereus adhered to the X80 steel. Electrochemical impedance spectroscopy showed that B. cereus could accelerate the corrosion of X80 steel. In addition, surface morphology observations indicated that B. cereus could accelerate pitting corrosion in X80 steel. The depth of the largest pits due to B. cereus was approximately 11.23 mu m. Many pits were found on the U-shaped bents and cracks formed under stress after 60 days of immersion in the presence of B. cereus. These indicate that pitting corrosion can be accelerated by B. cereus. X-ray photoelectron spectroscopy results revealed that NH4+ existed on the surface of X80 steel. B. cereus is a type of nitrate-reducing bacteria and hence the corrosion mechanism of B. cereus may involve nitrate reduction on the X80 steel. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：18 / 26
页数：9
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