海洋环境下钢筋混凝土桩基的腐蚀与阴极保护特征分析
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庄宁, 曾易, 欧阳正平, 许金荣, 李翰泽, 宋霄锟, 王亚洲
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Analysis of Corrosion and Cathodic Protection Characteristics of Reinforced Concrete Pile in Simulated Marine Environments
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ZHUANG Ning, ZENG Yi, OUYANG Zhengping, XU Jinrong, LI Hanze, SONG Xiaokun, WANG Yazhou
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表1 RC桩阻抗谱数据的拟合结果
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Table 1 Fitting results of EIS spctra of RC pile
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| Test stage | Test time | Elevation / cm | Rs / Ω·cm2 | Rcon / Ω·cm2 | CPEc / S·sec n ·cm-2 | n1 | Rct / Ω·cm2 | CPEdl / S·sec n ·cm-2 | n2 | χ2 |
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| Corrosion stage | 33 d | 15 | 66.3 | 166.5 | 6.32 × 10-4 | 0.19 | 1398.2 | 3.79 × 10-3 | 0.73 | 2.22 × 10-2 | | (5%) | 25 | 45.8 | 198.6 | 9.86 × 10-4 | 0.24 | 1565.6 | 6.84 × 10-3 | 0.85 | 1.56 × 10-2 | | 35 | 59.4 | 322.2 | 5.09 × 10-4 | 0.14 | 1213.4 | 2.65 × 10-3 | 0.71 | 5.64 × 10-2 | | 45 | 126.7 | 159.4 | 1.67 × 10-4 | 0.36 | 721.5 | 2.96 × 10-3 | 0.72 | 3.37 × 10-2 | | 55 | 137.2 | 302.0 | 1.12 × 10-4 | 0.37 | 821.2 | 3.04 × 10-3 | 0.75 | 9.63 × 10-2 | | 65 | 63.4 | 368.6 | 8.79 × 10-5 | 0.21 | 926.2 | 3.31 × 10-3 | 0.78 | 2.28 × 10-2 | | 75 | 75.6 | 565.7 | 3.46 × 10-4 | 0.13 | 924.8 | 3.12 × 10-3 | 0.72 | 3.05 × 10-2 | | 65 d | 15 | 64.4 | 120.3 | 4.93 × 10-3 | 0.13 | 613.2 | 3.15 × 10-3 | 0.83 | 2.66 × 10-2 | | (10%) | 25 | 97.6 | 130.6 | 5.52 × 10-4 | 0.25 | 774.3 | 3.21 × 10-3 | 0.64 | 2.72 × 10-2 | | 35 | 122.8 | 264.5 | 3.89 × 10-5 | 0.42 | 633.4 | 2.57 × 10-3 | 0.77 | 2.58 × 10-2 | | 45 | 101.2 | 153.1 | 6.76 × 10-5 | 0.46 | 622.1 | 3.62 × 10-3 | 0.62 | 2.35 × 10-2 | | 55 | 141.3 | 192.8 | 4.67 × 10-5 | 0.44 | 714.2 | 3.39 × 10-3 | 0.72 | 6.46 × 10-3 | | 65 | 65.1 | 341.6 | 4.23 × 10-4 | 0.15 | 476.9 | 3.86 × 10-3 | 0.79 | 2.63 × 10-2 | | 75 | 77.5 | 484.9 | 1.39 × 10-4 | 0.19 | 602.2 | 3.65 × 10-3 | 0.73 | 6.80 × 10-3 | | 98 d | 15 | 52.3 | 62.5 | 3.46 × 10-5 | 0.52 | 355.2 | 2.71 × 10-3 | 0.75 | 4.12 × 10-2 | | (15%) | 25 | 65.6 | 65.4 | 9.21 × 10-5 | 0.44 | 355.8 | 3.43 × 10-3 | 0.72 | 3.64 × 10-2 | | 35 | 124.4 | 125.8 | 4.15 × 10-5 | 0.50 | 413.3 | 3.57 × 10-3 | 0.76 | 3.57 × 10-2 | | 45 | 138.9 | 147.2 | 8.30 × 10-5 | 0.42 | 332.4 | 3.32 × 10-3 | 0.63 | 4.32 × 10-2 | | 55 | 158.0 | 171.6 | 4.79 × 10-5 | 0.49 | 357.5 | 3.71 × 10-3 | 0.64 | 3.47 × 10-2 | | 65 | 69.7 | 264.0 | 2.64 × 10-4 | 0.16 | 337.3 | 4.56 × 10-3 | 0.76 | 1.65 × 10-2 | | 75 | 71.5 | 341.0 | 1.67 × 10-4 | 0.18 | 483.9 | 3.85 × 10-3 | 0.62 | 1.77 × 10-2 | | Cathodic protection | 30 d | 15 | 50.4 | 132.7 | 7.79 × 10-6 | 0.59 | 475.8 | 3.43 × 10-3 | 0.69 | 6.13 × 10-2 | | stage | | 25 | 61.6 | 132.3 | 3.11 × 10-5 | 0.46 | 469.1 | 3.47 × 10-3 | 0.60 | 4.35 × 10-2 | | 35 | 100.1 | 564.5 | 5.98 × 10-5 | 0.43 | 453.2 | 3.85 × 10-3 | 0.76 | 4.97 × 10-2 | | 45 | 114.5 | 537.6 | 1.02 × 10-4 | 0.42 | 485.7 | 3.89 × 10-3 | 0.77 | 3.70 × 10-2 | | 55 | 141.7 | 509.1 | 6.43 × 10-6 | 0.66 | 322.5 | 9.15 × 10-4 | 0.43 | 4.53 × 10-2 | | 65 | 54.8 | 120.9 | 7.26 × 10-5 | 0.48 | 304.6 | 3.90 × 10-3 | 0.77 | 5.76 × 10-2 | | 75 | 45.6 | 396.7 | 1.98 × 10-4 | 0.17 | 682.3 | 4.31 × 10-3 | 0.84 | 3.35 × 10-2 | | 60 d | 15 | 66.4 | 185.5 | 9.56 × 10-6 | 0.58 | 654.7 | 2.05 × 10-3 | 0.67 | 6.88 × 10-2 | | 25 | 72.6 | 264.2 | 9.89 × 10-5 | 0.36 | 1383.4 | 2.10 × 10-4 | 0.75 | 6.73 × 10-2 | | 35 | 135.4 | 543.5 | 3.10 × 10-5 | 0.45 | 1002.1 | 2.18 × 10-3 | 0.72 | 6.26 × 10-2 | | 45 | 158.5 | 589.8 | 1.90 × 10-5 | 0.51 | 1033.3 | 2.03 × 10-3 | 0.78 | 7.64 × 10-2 | | 55 | 159.3 | 580.4 | 1.58 × 10-4 | 0.44 | 1388.2 | 5.49 × 10-3 | 0.77 | 2.48 × 10-2 | | 65 | 91.9 | 237.5 | 1.45 × 10-5 | 0.57 | 785.8 | 1.33 × 10-3 | 0.79 | 3.01 × 10-2 | | 75 | 60.0 | 305.1 | 2.85 × 10-4 | 0.15 | 1067.9 | 3.67 × 10-3 | 0.86 | 3.34 × 10-2 | | 90 d | 15 | 51.7 | 227.2 | 1.01 × 10-4 | 0.39 | 995.6 | 2.48 × 10-3 | 0.67 | 6.69 × 10-2 | | 25 | 86.2 | 130.6 | 3.72 × 10-6 | 0.68 | 1134.2 | 1.02 × 10-3 | 0.52 | 1.16 × 10-2 | | 35 | 130.5 | 603.2 | 1.32 × 10-5 | 0.52 | 1644.9 | 1.12 × 10-3 | 0.65 | 1.53 × 10-2 | | 45 | 136.6 | 574.9 | 1.74 × 10-4 | 0.24 | 1795.4 | 2.09 × 10-3 | 0.79 | 4.36 × 10-2 | | 55 | 139.3 | 551.5 | 1.09 × 10-4 | 0.32 | 2144.2 | 1.87 × 10-3 | 0.54 | 5.75 × 10-2 | | 65 | 71.5 | 125.0 | 6.92 × 10-5 | 0.45 | 2411.5 | 2.13 × 10-3 | 0.77 | 2.78 × 10-2 | | 75 | 50.9 | 313.6 | 6.91 × 10-5 | 0.20 | 2089.2 | 1.65 × 10-3 | 0.73 | 4.21 × 10-2 |
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