许萍,魏智刚,王婧,张雅君.罗伊氏乳杆菌胞外聚合物抑制碳钢腐蚀行为研究[J].表面技术,2016,45(3):134-140. XU Ping,WEI Zhi-gang,WANG Jing,ZHANG Ya-jun.Research of Lactobacillus reuteri Extracellular Polymeric Substances Inhibition of Carbon Steel Corrosion Behavior[J].Surface Technology,2016,45(3):134-140 |
罗伊氏乳杆菌胞外聚合物抑制碳钢腐蚀行为研究 |
Research of Lactobacillus reuteri Extracellular Polymeric Substances Inhibition of Carbon Steel Corrosion Behavior |
投稿时间:2015-11-02 修订日期:2016-03-20 |
DOI:10.16490/j.cnki.issn.1001-3660.2016.03.022 |
中文关键词: 罗伊式乳杆菌 胞外聚合物 碳钢 腐蚀速率 腐蚀产物 |
英文关键词:lactobacillus reuteri extracellular polymeric substances carbon steel corrosion rate corrosion products |
基金项目:国家自然科学基金(51278026, 51578035);北京建筑大学(00331615008);城市雨水系统与水环境省部共建教育部重点实验室项目(PXM2014 014210 000057)Fund:Supported bythe National Natural Science Foundation of China (51278026, 51578035)、Doctoral Program Foundation of BUCEA(00331615008)and Research Foundation of KLUSSWE-ME BUCEA(PXM2014 014210 000057) |
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Author | Institution |
XU Ping | Key Laboratory of Urban Stormwater System and Water Environment of Ministry of Education,Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
WEI Zhi-gang | Key Laboratory of Urban Stormwater System and Water Environment of Ministry of Education,Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
WANG Jing | Jilin Light Industry Design Institute Limited Company, Jilin 132000, China |
ZHANG Ya-jun | Key Laboratory of Urban Stormwater System and Water Environment of Ministry of Education,Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
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中文摘要: |
目的 针对碳钢的腐蚀,选取罗伊氏乳杆菌胞外聚合物作为研究对象,研究其对碳钢腐蚀的抑制作用,为探索新型环保的金属表面防护措施提供技术支持。方法 采用腐蚀失重、X射线衍射(XRD)、扫描电镜(SEM)等分析检测手段,研究浸涂罗伊氏乳杆菌胞外聚合物后碳钢腐蚀速率、界面腐蚀产物以及腐蚀形貌结构的变化。结果 罗伊氏乳杆菌胞外聚合物对碳钢腐蚀具有抑制作用,可以使平均腐蚀速率降低25.60%;与未浸涂工况相比,浸涂罗伊氏乳杆菌胞外聚合物后,碳钢界面的腐蚀产物种类没有变化,但两者在磁铁矿、磁赤铁矿与纤铁矿的比例上存在显著差异;浸涂工况下,前9天上述三种腐蚀产物的比例维持在1.0:1.0:1.1左右;此外,浸涂后,界面腐蚀产物与碳钢表面结合牢固,也不易脱落。结论 在碳钢界面浸涂罗伊氏乳杆菌胞外聚合物可以有效抑制腐蚀;罗伊氏乳杆菌胞外聚合物对碳钢界面晶体间转化关系以及腐蚀产物稳定性的改变,是碳钢腐蚀速率下降的主要原因。 |
英文摘要: |
Objective For exploring new environmentally friendly metal surface protection measures, corrosion inhibition of extracellular polymeric substances (EPS) of lactobacillus reuteri on carbon steel was researched. Method By corrosion weight loss method, X-ray diffraction (XRD) and scanning electron microscope (SEM), corrosion rates, corrosion products and interface morphology structure of carbon steel coupons with or without dip-coated EPS of lactobacillus reuteri were analysized. Results EPS of lactobacillus reuteri reduced the average corrosion rate of carbon steel by 25.60%. Whether with EPS or without EPS, both coupons had the same types of corrosion products. However, the proportion of magnetite, maghemite and lepidocrocite was significantly different. On the first nine days, the magnetite/ maghemite/ lepidocrocite ratio on the coupons with EPS remained in 1.0:1.0:1.1. In addition, compared with coupons without EPS, corrosion products combined with the carbon steel surface more firmly, and less rarely fell off. Conclusion EPS of lactobacillus reuteri onto carbon steel can effectively inhibit corrosion; the impacts of EPS of lactobacillus reuteri on the crystal transformation and the stability of the corrosion products of carbon steel are the main reasons for inhibition of carbon steel corrosion. |
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