摘要
采用旋转反应器模拟再生水铸铁管道工况,通过腐蚀失重、扫描电镜、X射线衍射以及能谱分析等手段,研究了再生水中多糖和蛋白质两种溶解性有机物(DOM)对铸铁腐蚀的影响。结果表明:多糖和蛋白质均可抑制铸铁的腐蚀,多糖质量浓度为2mg/L或蛋白质质量浓度为6mg/L时,铸铁腐蚀最为稳定且腐蚀速率最小;在多糖条件下,腐蚀产物主要由稳定性较强的α-FeOOH组成;在蛋白质条件下,硅氧化形成一层较致密的SiO_2膜,对铸铁起到保护作用。
A rotating reactor was used to simulate the working condition of cast iron pipes for reclaimed water.The effects of two kinds of dissolved organic matter（DOM）,polysaccharide and protein,on the corrosion of cast iron in reclaimed water were studied by means of corrosion weight loss method,scanning electron microscopy（SEM）,X-ray diffraction（XRD）and energy dispersive spectroscopy（EDS）.The results indicate that both polysaccharide and protein can inhibit the corrosion of cast iron.The cast iron had the lowest corrosion rate when the concentration of polysaccharide was 2 mg/L or the concentration of protein was 6 mg/L.The corrosion products were mainly composed of stableα-FeOOH under the polysaccharide condition,and SiO2 formed a dense oxide film which can protect the cast iron under the protein condition.
作者
冯萃敏
安鑫悦
尹晓星
张嵩浩
张欣蕊
FENG Cuimin;AN Xinyue;YIN Xiaoxing;ZHANG Songhao;ZHANG Xinrui(Key Laboratory of Urban Stormwater System and Water Environment of Ministry of Education,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;National Demonstration Center for Experimental Water Environment Education,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Jiangxi College of Applied Technology,Ganzhou 341000,China;Beijing General Municipal Engineering Design ＆ Research Institute Co.,Ltd.,Beijing 100037,China)
出处
《腐蚀与防护》
CAS
北大核心
2018年第8期571-575,581,共6页
Corrosion & Protection
基金
国家自然科学基金(51678026)
北京市科技计划(Z171100000717011)
关键词
再生水
溶解性有机物(DOM)
铸铁
腐蚀
reclaimed water
dissolved organic matter （DOM）
cast irom corrosion
