摘要
市政再生水的有机物、氮、磷和微生物含量均高于地表水,采用其作为工业循环冷却水系统的补充水源后,微生物对金属腐蚀的影响亟待研究.为此,针对市政再生水作为补充水源的循环冷却水,采用实际水质,以微生物群体为研究对象,采用电化学分析、腐蚀挂片实验和电镜扫描方法,对比分析了常规循环水与灭菌循环水中不锈钢、黄铜和碳钢的3种拟合电阻(溶液电阻、生物膜电阻和极化电阻)、腐蚀电流、腐蚀电位以及腐蚀速率的变化规律.实验结果表明,循环水中的微生物均在不同程度上加剧了3种金属的腐蚀,其中微生物对不锈钢腐蚀的影响最大,碳钢次之,黄铜最小.微生物对不锈钢、黄铜和碳钢腐蚀行为变化规律的影响存在显著差异,微生物没有改变不锈钢和碳钢腐蚀行为随时间的变化规律,但却对黄铜的腐蚀规律产生了显著影响.
Compared with surface water, there are more organics, nitrogen,phosphorus and microorganisms in municipal reclaimed water, It is necessary to research microbioiogically induced corrosion （MIC） in industrial recycling cooling water system makeup by municipal reclaimed water. For recycling cooling water system makeup by municipal reclaimed water, MIC of stainless steel, brass and carbon steel in the sterile and non-sterile real water is studied and compared by electrochemical method, corrosion coupons experiment and scanning electron microscope. The main parameters are fitting resistance（solution resistance, biofilm resistance and polarization resistance）, corrosion potential, corrosion current and corrosion rate. The results show that the corrosions of three metals are all exacerbated in non- sterile water, with the MIC of stainless steel the most serious and that of brass the least serious. The impacts of mi- croorganism on the corrosion behavior of stainless steel, brass and carbon steel are significantly different. Microor- ganism has no influence on the variation of corrosion behavior of stainless steel and carbon steel with time, but its impact on brass corrosion behavior is significant.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2013年第2期127-132,共6页
Journal of Tianjin University(Science and Technology)
基金
国家自然科学基金资助项目(51278026)
国家重大水专项资助项目(2009ZX07314-009-04
2009ZX07317-005)
关键词
市政再生水
循环冷却水
不锈钢
黄铜
碳钢
微生物腐蚀
municipal reclaimed water
recycling cooling water
stainless steel
brass
carbon steel
microbiologically induced corrosion
