孙福洋,赵国仙,杨东平,孙蕊.循环冷却水中 2507 双相不锈钢微生物腐蚀研究[J].表面技术,2015,44(6):70-74,87.
SUN Fu-yang,ZHAO Guo-xian,YANG Dong-ping,SUN Rui.Microbiological Corrosion Characteristics of 2507 Duplex Stainless Steel in Circulating Cooling Water[J].Surface Technology,2015,44(6):70-74,87
循环冷却水中 2507 双相不锈钢微生物腐蚀研究
Microbiological Corrosion Characteristics of 2507 Duplex Stainless Steel in Circulating Cooling Water
投稿时间:2014-12-12  修订日期:2015-06-20
DOI:10.16490/j.cnki.issn.1001-3660.2015.06.014
中文关键词:  双相不锈钢  循环冷却水  点蚀  微生物腐蚀
英文关键词:duplex stainless steel  circulating cooling water  pitting corrosion  microbiological corrosion
基金项目:国家自然科学基金(51271146)
作者单位
孙福洋 西安石油大学 材料科学与工程学院, 西安 710065 
赵国仙 西安石油大学 材料科学与工程学院, 西安 710065 
杨东平 西安石油大学 材料科学与工程学院, 西安 710065 
孙蕊 西安石油大学 材料科学与工程学院, 西安 710065 
AuthorInstitution
SUN Fu-yang School of Material Science and Engineering, Xi忆an Shiyou University, Xi忆an 710065, China 
ZHAO Guo-xian School of Material Science and Engineering, Xi忆an Shiyou University, Xi忆an 710065, China 
YANG Dong-ping School of Material Science and Engineering, Xi忆an Shiyou University, Xi忆an 710065, China 
SUN Rui School of Material Science and Engineering, Xi忆an Shiyou University, Xi忆an 710065, China 
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中文摘要:
      目的 研究 2507 双相不锈钢在循环冷却水模拟溶液(添加微生物 SRB+IOB)中的腐蚀特征,确定其腐蚀机理。 方法 模拟某炼油厂循环冷却水溶液,采用 SEM,EDS 和电化学测试等手段分析 2507 双相不锈钢在 SRB+IOB 循环冷却水中浸泡不同时间后的腐蚀产物形貌及其电化学腐蚀情况。 结果 2507双相不锈钢的腐蚀速率很低,属于轻度腐蚀;在循环冷却水模拟溶液中的阳极极化曲线具有明显的钝化区,且钝化膜具有良好的自修复能力;腐蚀倾向随时间增加先增大后减小,腐蚀速率随时间增加先减小后增大。 结论 SRB 和 IOB 及其代谢活动与 Cl-协同作用是点蚀的主要原因;2507 双相不锈钢具有良好的钝化性和耐微生物腐蚀性能。
英文摘要:
      Objective To study the corrosion characteristics and determine the corrosion mechanism of 2507 duplex stainless steel in circulating cooling water simulated solution containing SRB+IOB. Methods The circulating cooling water in a refinery was simulated, and the morphology of corrosion products and the corrosion mechanism of electrochemical of 2507 duplex stainless steel in circulating cooling water simulated solution containing SRB+IOB were analyzed by SEM, EDS and electrochemical impedance spectroscopy (EIS) and polarization curves after soaking for different days. Results The corrosion rate of 2507 duplex stainless steel was very low, belonging to mild corrosion. Anodic polarization curves of 2507 duplex stainless steel in circulating cooling water simulated solution showed significant passivation regions and the passivation film had a good self-healing ability. With increasing corrosion time, the corrosion tendency first increased and then decreased while the corrosion rate first decreased and then increased. Conclusion The main cause for the pitting corrosion was the synergic effect of the surface adsorbed SRB and IOB as well as their metabolic activities with Cl-. 2507 duplex stainless steel had a good passivation performance and resistance to microbiological corrosion.
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