混凝土配重层对近海海底钢质管道阴极保护效果的影响

王萌萌, 曹国民, 孟繁兴, 李天亮, 宋沁峰, 单太航, 董亮

Influence of Concrete Counterweight Layer on Cathodic Protection Effect of Nearshore Submarine Steel Pipes

WANG Mengmeng, CAO Guomin, MENG Fanxing, LI Tianliang, SONG Qinfeng, SHAN Taihang, DONG Liang

表5 在静态海水和海泥中带混凝土层X60钢的阻抗拟合参数

Table 5 Impedance fitting parameters of concrete weighted X60 steel in static environment

Environment Ep, CSE / mV Rs / Ω·cm2 Cc / F·cm-2 Rc / Ω·cm2 Cdl / F·cm-2 Rp / Ω·cm2 5‰ salinity seawater -806 850.3 1.523 × 10-9 20685 2.051 × 10-4 41341 -867 761.6 1.526 × 10-9 20418 2.819 × 10-4 44493 -945 813.3 1.490 × 10-9 20513 3.842 × 10-4 21283 -1011 817.4 1.488 × 10-9 20415 4.401 × 10-4 16398 -1068 839.1 1.444 × 10-9 20261 4.103 × 10-4 14555 -1120 875.8 1.436 × 10-9 20230 3.992 × 10-4 11554 -1154 861.7 1.479 × 10-9 20558 5.117 × 10-4 8124 16.8‰ salinity seawater -811 220.4 1.220 × 10-9 8557 1.769 × 10-4 10295 -834 490.8 1.270 × 10-9 8033 2.511 × 10-4 8168 -880 319.4 1.284 × 10-9 7527 4.613 × 10-4 5472 -978 210.9 1.225 × 10-9 7224 6.221 × 10-4 2594 -1076 524.1 1.255 × 10-9 6791 4.856 × 10-4 1640 -1151 311.1 1.181 × 10-9 6456 1.032 × 10-3 1709 -1201 510.5 1.227 × 10-9 6360 9.296 × 10-4 2899 26.7‰ salinity seawater -822 574.3 1.121 × 10-9 4498 6.686 × 10-4 3231 -868 562.1 1.120 × 10-9 4476 1.061 × 10-3 2268 -947 581.3 1.091 × 10-9 4453 1.307 × 10-3 1364 -1019 575.8 1.097 × 10-9 4418 1.316 × 10-4 1036 -1081 575 1.114 × 10-9 4416 8.392 × 10-4 2507 -1149 557.9 1.132 × 10-9 4528 6.801 × 10-4 2155 -1221 539.5 1.158 × 10-9 4506 4.529 × 10-4 1805 Sea mud -789 155 1.299 × 10-9 10401 2.297 × 10-4 16877 -829 165 1.285 × 10-9 10779 3.276 × 10-4 14086 -896 133.7 1.276 × 10-9 11161 4.821 × 10-4 10706 -1010 154.9 1.283 × 10-9 11320 6.745 × 10-4 8185 -1081 90.58 1.260 × 10-9 11431 7.529 × 10-4 6803 -1104 160.5 1.290 × 10-9 10941 5.513 × 10-4 5293 -1167 133.5 1.259 × 10-9 10942 4.209 × 10-4 3600