On-Site Electrochemical Detection of Corrosion in Substation Grounding System
Abstract
:1. Introduction
2. Experimental
2.1. Excavation and Sampling Methods
2.1.1. Excavation Method for the Grounding Grid
2.1.2. Sampling Method for Soil Samples
2.2. Measurement of Electrochemical Polarization Plot
2.3. Soil Physical and Chemical Properties
2.3.1. pH Measurement
2.3.2. Measurement of Total Water-Soluble Salts
- ma = drying quality of evaporation dish + salt (g);
- mb = drying quality of evaporating dish (g);
- D = partition multiple, 250/20~50;
- m = weight of the air-dried sample (g).
2.3.3. Determination of Chloride Ions
2.3.4. Determination of Moisture Content
- m0 = mass of dry empty aluminum box (g);
- m1 = mass of the aluminum box and soil sample before drying (g);
- m2 = mass of the aluminum box and soil sample after drying (g).
3. Results and Discussion
4. Multiple Linear Regression Analysis
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Substation | Corrosion Rate (mm/a) | Corrosion Current (mAcm−2) | Corrosion Potential (V) |
---|---|---|---|
i | 0.1643 | 1.4125 × 10−5 | −0.642 |
ii | 0.1844 | 1.5849 × 10−5 | −0.562 |
iii | 0.2117 | 1.8197 × 10−5 | −0.231 |
iv | 0.5568 | 4.7863 × 10−5 | −0.632 |
v | 0.5698 | 4.8978 × 10−5 | −0.632 |
vi | 0.5800 | 5.0119 × 10−5 | −0.261 |
vii | 1.4313 | 1.23027 × 10−4 | −0.633 |
viii | 2.5453 | 2.8776 × 10−4 | −0.741 |
iv | 1.773 × 10−4 | 3.7025 × 10−6 | −0.233 |
Substation | Soil Resistivity (Ω·m) | Soil Quality | Chloride Ion Concentration (mg/kg) | pH | Moisture Content (%) | Total Water-Soluble Salts (mg/kg) | Sulfate Concentration (mg/kg) |
---|---|---|---|---|---|---|---|
i | 8.48 | Sand | 7.81 | 8.37 | 15.24 | 185.50 | 92.64 |
ii | 13.19 | Clay loam soil | 3.55 | 8.11 | 10.45 | 219.40 | 80 |
iii | 5.08 | Clay | 18.46 | 8.32 | 19.33 | 421.50 | 275.28 |
iv | 6.22 | Sand | 5.68 | 8.44 | 16.69 | 221.50 | 144.00 |
v | 10.17 | Silty soil | 29.82 | 8.25 | 16.51 | 1107.5 | 208 |
vi | 4.52 | Silty soil | 24.85 | 7.77 | 14.195 | 1386 | 128 |
vii | 21.67 | Sand | 39.05 | 7.99 | 10.825 | 1100 | 528 |
viii | 2.82 | Silty soil | 49.7 | 8.06 | 13.48 | 1605 | 80 |
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Yu, B.; Zhao, P.; Cai, Y.; Yuan, W.; Yu, J.; Tan, Y. On-Site Electrochemical Detection of Corrosion in Substation Grounding System. Energies 2024, 17, 3906. https://doi.org/10.3390/en17163906
Yu B, Zhao P, Cai Y, Yuan W, Yu J, Tan Y. On-Site Electrochemical Detection of Corrosion in Substation Grounding System. Energies. 2024; 17(16):3906. https://doi.org/10.3390/en17163906
Chicago/Turabian StyleYu, Ben, Peng Zhao, Yuhang Cai, Weiming Yuan, Jinshan Yu, and Yu Tan. 2024. "On-Site Electrochemical Detection of Corrosion in Substation Grounding System" Energies 17, no. 16: 3906. https://doi.org/10.3390/en17163906