工业废水水暖管道腐蚀失效分析
CORROSION FAILURE ANALYSES OF INDUSTRIAL WASTE WATER HEATING PIPE
摘 要
针对工业废水水暖管道腐蚀失效问题,采用化学成分分析、X射线衍射、光学显微镜、腐蚀电化学试验等方法对腐蚀钢管进行分析.结果表明,腐蚀沉积物中含有Fe3O4、Fe2O3、Fe2(SO4)3及FeS；水介质pH值低于最小腐蚀速度范围的pH值；水介质中Cl-浓度值偏高,SO2-4浓度值比标准偏高近一倍,这些因素对钢管的腐蚀速度及腐蚀性能均造成影响；母材中存在的夹杂和带状组织对材料的腐蚀性影响不大.因此工业废水用于供暖管网前,应对介质水进行一定的处理来保证供暖管网的寿命.
腐蚀
失效分析
电化学分析
Steel pipe
Corrosion
Failure analysis
Electrochemical corrosion
Abstract
Chemical composition analysis,X-ray diffraction,optical microscopy and electrochemical testing methods were adopted to test the corrosion of steel pipe.The corrosion accumulation in the steel pipe was composed of Fe3O4,Fe2O3,Fe2(SO4)3 and FeS.The pH value of medium water in heating pipe was 7.5~8.26 and lower than the pH value 10~12,which is the value corresponding to minimum corrosion speed.Concentration of Cl- was high and that of SO2-4 was about double of the standard value.These factors could influence the corrosion speed and corrosion performance of steel pipe.The banded structure in the steel pipe had hardly influenced the corrosion.The industrial waste treatment should be carried out to improve the life time of the heating steel pipe before it is used.
中图分类号 TG172
所属栏目 失效分析
基金项目
收稿日期 2007/1/17
修改稿日期 2007/2/12
网络出版日期
作者单位点击查看
引用该论文: ZHANG Hong-xia,WANG Wen-xian,CHEN Shao-ping,ZHOU Cui-lan. CORROSION FAILURE ANALYSES OF INDUSTRIAL WASTE WATER HEATING PIPE[J]. Corrosion & Protection, 2007, 28(6): 320～322
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参考文献
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【4】朱国文,高立群,林建,等.供热系统中碳钢管的腐蚀原因分析[J].腐蚀科学与防护技术,2001,13(5):302-304.
【2】凌汉宏.高压锅炉水侧腐蚀及防治[J].石油化工腐蚀与防护,2003,20(6):1-5.
【3】Jenabali Jahromi S A,Janghorban A.Assessment of corrosion in low carbon steel tubes of shiraz refinery air coolers[J].Engineering Failure Analysis,2005(12):569-577.
【4】朱国文,高立群,林建,等.供热系统中碳钢管的腐蚀原因分析[J].腐蚀科学与防护技术,2001,13(5):302-304.
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