红壤地区接地材料现场埋样与加速腐蚀实验的相关性研究

doi:10.11902/1005.4537.2018.172

中国腐蚀与防护学报

2019, Vol. 39

Issue (6): 550-556 DOI: 10.11902/1005.4537.2018.172

研究报告

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红壤地区接地材料现场埋样与加速腐蚀实验的相关性研究

朱亦晨¹,刘光明¹(

),刘欣²,裴锋²,田旭²,师超¹

1. 南昌航空大学材料科学与工程学院南昌 330063
2. 国网江西省电力有限公司电力科学研究院南昌 330096

Investigation on Interrelation of Field Corrosion Test and Accelerated Corrosion Test of Grounding Materials in Red Soil Environment

ZHU Yichen¹,LIU Guangming¹(

),LIU Xin²,PEI Feng²,TIAN Xu²,SHI Chao¹

1. School of Material Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China
2. State Grid Jiangxi Electric Power Research Institute, Nanchang 330096, China

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摘要:

通过现场埋设实验和室内加速腐蚀实验，结合失重测试以及腐蚀形貌和腐蚀产物分析，研究了8种典型接地材料在红壤环境中的腐蚀行为，计算了加速腐蚀实验的加速比及相关性系数。结果表明，不同接地材料在相同加速腐蚀环境下有不同的腐蚀加速比，其腐蚀机理与现场埋设试样基本一致，其中Q235钢以及铜质接地材料腐蚀产物与现场埋样结果出现差异的原因主要与土壤中的微生物活性和CO₂溶解度有关。相关性分析表明，加速腐蚀与现场埋设实验的Pearson相关系数P为0.9663，可以近似的通过加速腐蚀实验结果对红壤地区接地材料的使用寿命进行评估。

关键词 ：接地材料, 土壤腐蚀, 加速腐蚀实验, 相关性

Abstract：

The corrosion behavior of eight typical grounding materials in red soil environment were studied via buried test in real red soil and accelerated corrosion test, as well as weight-loss measurement, corrosion morphology and corrosion product composition analysis. And then the acceleration ratio and interrelation rate between accelerated corrosion test and field corrosion test were calculated. The results showed that different grounding materials had different corrosion acceleration ratios in the same accelerated corrosion test, and the corrosion mechanism of accelerated corrosion test is basically consistent with that of field corrosion test. However, after accelerated corrosion test and field corrosion test, the compositions of the formed corrosion products on Q235 steel and Cu grounding material were all different, because of the differences of microbial activity and CO₂ solubility in soils. Correlation analysis results showed that the Pearson correlation coefficient (P) between accelerated corrosion test and field corrosion test was 0.9663, in other word, the service life of grounding materials buried in the field could be evaluated by the accelerated corrosion test.

Key words： grounding meterial soil corrosion accelerated corrosion test interrelation

收稿日期: 2018-11-20

ZTFLH:

TG172.4

基金资助:国家自然科学基金(51961028);国家电网公司科技项目(52182017000Y)

通讯作者: 刘光明 E-mail: gemliu@126.com

Corresponding author: Guangming LIU E-mail: gemliu@126.com

作者简介: 朱亦晨，男，1996年生，硕士生

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引用本文:

朱亦晨,刘光明,刘欣,裴锋,田旭,师超. 红壤地区接地材料现场埋样与加速腐蚀实验的相关性研究[J]. 中国腐蚀与防护学报, 2019, 39(6): 550-556.
Yichen ZHU, Guangming LIU, Xin LIU, Feng PEI, Xu TIAN, Chao SHI. Investigation on Interrelation of Field Corrosion Test and Accelerated Corrosion Test of Grounding Materials in Red Soil Environment. Journal of Chinese Society for Corrosion and protection, 2019, 39(6): 550-556.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2018.172 或 https://www.jcscp.org/CN/Y2019/V39/I6/550

图1 实验装置示意图

表1 清洗液配方及清洗参数

图2 现场埋样和加速腐蚀实验条件下接地材料的腐蚀速率

图3 红壤中接地材料现场腐蚀实验296 d后的宏观腐蚀形貌

图4 红壤中接地材料加速腐蚀实验30 d后的宏观腐蚀形貌

图5 红壤中接地材料现场腐蚀实验296 d后的微观腐蚀形貌

图6 红壤中接地材料加速腐蚀30 d后的微观腐蚀形貌

表2 试样腐蚀产物的XRD分析结果

图7 加速腐蚀实验与现场腐蚀实验的Pearson相关性

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