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| 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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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.
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Received: 20 November 2018
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| Fund: Supported by National Natural Science Foundation of China(51961028);Science and Technology Project of State Grid Corporation(52182017000Y) |
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Corresponding Authors:
Guangming LIU
E-mail: gemliu@126.com
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