Research Article
Experimental Study on the Influence of Sulfate Reducing Bacteria on the Metallic Corrosion Behavior under Disbonded Coating
Table 4
The electrochemical parameters.
| Simulated solution | Experiment time | Stripping depths/mm | Disbonded thickness (mm) | The corrosion current density/A/cm2 | The self-corrosion potential/mV | The ratio of anode Tafel slope and cathode Tafel slope |
| Soil simulated solution | 1 d | 0 | 0.5 | 23.1029 | −702 | 1.7328 | 1.0 | 35.1429 | −719 | 1.6204 | 80 | 0.5 | 19.2514 | −722 | 1.6538 | 1.0 | 35.3486 | −724 | 1.7384 | 160 | 0.5 | 11.5943 | −718 | 1.5963 | 1.0 | 34.3171 | −718 | 1.5686 | 7 d | 0 | 0.5 | 43.7829 | −708 | 1.5726 | 1.0 | 38.2800 | −719 | 1.4733 | 80 | 0.5 | 30.3086 | −722 | 1.5250 | 1.0 | 38.1543 | −717 | 1.3973 | 160 | 0.5 | 26.0457 | −725 | 1.4844 | 1.0 | 36.8343 | −716 | 1.3790 | 14 d | 0 | 0.5 | 45.2457 | −701 | 1.4111 | 1.0 | 45.8971 | −718 | 1.4050 | 80 | 0.5 | 32.3429 | −717 | 1.4049 | 1.0 | 48.0971 | −720 | 1.3542 | 160 | 0.5 | 27.7543 | −723 | 1.4831 | 1.0 | 46.9549 | −713 | 1.3135 |
| Soil simulated solution + SRB | 1 d | 0 | 0.5 | 25.8171 | −688 | 1.8134 | 1.0 | 35.6800 | −707 | 1.8220 | 80 | 0.5 | 20.2457 | −696 | 1.6897 | 1.0 | 31.9029 | −710 | 1.6832 | 160 | 0.5 | 19.5143 | −700 | 1.6727 | 1.0 | 31.7543 | −705 | 1.6649 | 7 d | 0 | 0.5 | 30.9143 | −688 | 1.7509 | 1.0 | 66.9429 | −692 | 1.7047 | 80 | 0.5 | 28.4971 | −692 | 1.7250 | 1.0 | 67.3714 | −706 | 1.6529 | 160 | 0.5 | 21.7143 | −695 | 1.6395 | 1.0 | 65.6229 | −701 | 1.5372 | 14 d | 0 | 0.5 | 78.5143 | −675 | 1.7515 | 1.0 | 100.4343 | −692 | 1.5221 | 80 | 0.5 | 87.6457 | −680 | 1.2216 | 1.0 | 96.6857 | −710 | 1.4924 | 160 | 0.5 | 95.4914 | −676 | 1.0870 | 1.0 | 98.8457 | −701 | 1.4101 |
| Soil simulated solution + SRB + fungicide | 1 d | 0 | 0.5 | 16.3886 | −694 | 1.9859 | 1.0 | 33.6514 | −708 | 1.9256 | 80 | 0.5 | 19.0400 | −692 | 1.4779 | 1.0 | 34.5714 | −719 | 1.5530 | 160 | 0.5 | 21.2457 | −696 | 1.3274 | 1.0 | 32.9943 | −713 | 1.6431 | 7 d | 0 | 0.5 | 33.4433 | −698 | 1.6243 | 1.0 | 54.1429 | −695 | 1.7249 | 80 | 0.5 | 43.1143 | −732 | 1.4063 | 1.0 | 51.7086 | −703 | 1.7372 | 160 | 0.5 | 47.4286 | −691 | 1.4588 | 1.0 | 50.7714 | −696 | 1.5878 | 14 d | 0 | 0.5 | 48.6114 | −684 | 1.4157 | 1.0 | 79.0457 | −690 | 1.6985 | 80 | 0.5 | 63.8800 | −689 | 1.4475 | 1.0 | 77.1771 | −712 | 1.4383 | 160 | 0.5 | 75.1714 | −684 | 1.4206 | 1.0 | 78.0971 | −700 | 1.4900 |
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