| 引用本文: | 邱微,王立友,樊庆锌,袁一星,李炜煜.给水球墨铸铁管腐蚀特性及腐蚀对水质的影响[J].哈尔滨工业大学学报,2016,48(8):61.DOI:10.11918/j.issn.0367-6234.2016.08.010 |
| QIU Wei,WANG Liyou,FAN Qingxin,YUAN Yixing,LI Weiyu.Corrosion characteristics of unlined cast iron pipe used in water supply system and impact of corrosion on water quality[J].Journal of Harbin Institute of Technology,2016,48(8):61.DOI:10.11918/j.issn.0367-6234.2016.08.010 |
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| 给水球墨铸铁管腐蚀特性及腐蚀对水质的影响 |
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邱微1,2,王立友2,樊庆锌2,袁一星1,2,李炜煜2
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(1.城市水资源与水环境国家重点实验室 (哈尔滨工业大学), 哈尔滨 150090; 2.哈尔滨工业大学 市政环境工程学院,哈尔滨 150090)
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| 摘要: |
| 为研究给水球墨铸铁管腐蚀特性及腐蚀对水质的影响，以球墨铸铁管为主体制作三电极反应体系，以微生物为控制变量利用电化学工作站测定球墨铸铁管电化学腐蚀参数，同时分析腐蚀体系内水体水质变化.结果表明：非灭菌组自腐蚀电位66 d均值-0.515 V，自腐蚀电流密度均值7.61×10-4 mA/cm2，期间水质迅速变差，总铁质量浓度3 d后超标，色度和浊度最终分别达72、115 NTU.灭菌组自腐蚀电位66 d均值-0.471 V，自腐蚀电流密度均值5.26×10-4 mA/cm2，腐蚀强度较灭菌组稍缓，但水体最终变成“黄水”.没有或失去防腐涂层而暴露于水体中的给水球墨铸铁管初期极易发生以电化学腐蚀为主的综合性腐蚀，严重影响水质
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| 关键词: 给水系统 球墨铸铁管 腐蚀特性 极化曲线 水质 |
| DOI：10.11918/j.issn.0367-6234.2016.08.010 |
| 分类号:TU991.3 |
| 文献标识码:A |
| 基金项目:城市水资源与水环境国家重点实验室自主课题(2016TS02);黑龙江省自然科学基金(E201427); 国家留学基金资助 |
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| Corrosion characteristics of unlined cast iron pipe used in water supply system and impact of corrosion on water quality |
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QIU Wei1,2, WANG Liyou2, FAN Qingxin2, YUAN Yixing1,2, LI Weiyu2
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(1.State Key Laboratory of Urban Water Resources and Environment (Harbin Institute of Technology), Harbin 150090, China; 2.School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China)
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| Abstract: |
| A three-electrode cell has been developed to investigate corrosion characteristics of cast iron pipe and impact of the corrosion on water quality. The cast iron pipe corrosion parameters were measured by electrochemical workstation with microbe as controlled variable. The water quality was analysed in the corrosion system meanwhile. The results indicated that the average free-corrosion potential of the cast iron pipe was-0.515 V in non-sterile group during 66 days and the free-corrosion current was 7.61×10-4 mA/cm2, while the parameters for the reference group were-0.471 V and 5.26×10-4 mA/cm2, respectively. The water in non-sterile group deteriorated quickly with total iron exceeding 0.3 mg/L 3 days later. And chroma and turbidity of the water were 70 and 115 NTU. Corrosion rate of reference group was lower compared to non-sterile group, while the water became "red water" finally. Cast iron pipelines are prone to comprehensive corrosion characterized by electrochemical corrosion when there is little anti-corrosive coating on internal wall, leading to water quality deterioration.
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| Key words: water supply system cast iron pipeline corrosion characteristics polarization curves water quality |
