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Cathodic Protection of Complex Carbon Steel Structures in Seawater
| Content Provider | MDPI |
|---|---|
| Author | Refait, Philippe Grolleau, Anne-Marie Jeannin, Marc Sabot, René |
| Copyright Year | 2022 |
| Description | Cathodic protection efficiency of complex carbon steel structures in confined seawater environment was studied using a specific experimental device. Schematically, this device consisted of a Plexiglas matrix, crossed by a channel 50 cm long, 5 mm deep, 1.5 to 5 cm wide, which moreover included four bends at 90°. Seawater flowed continuously inside the channel over 12 steel coupons embedded in the Plexiglas matrix. Cathodic protection was applied at a constant potential of −1060 mV vs. Ag/AgCl-seawater with respect to a reference electrode located outside the channel, at the seawater flow entry. The potential of four selected coupons was monitored over time via a microelectrode set close to each coupon. It varied significantly with the distance separating the coupons from the channel entry. At the end of the 3.5-month experiment, a polarization curve was acquired. The residual corrosion rate under cathodic protection was estimated via the extrapolation of the anodic Tafel line. It varied from <1 µm $yr^{−1}$ to 16 µm $yr^{−1}$, depending on the potential reached by the coupon (between −900 and −1040 mV vs. Ag/AgCl-seawater) at the end of the experiment and on the properties of the calcareous deposit formed on the steel surface. |
| Ending Page | 453 |
| Page Count | 15 |
| Starting Page | 439 |
| e-ISSN | 26245558 |
| DOI | 10.3390/cmd3030026 |
| Journal | Corrosion and Materials Degradation |
| Issue Number | 3 |
| Volume Number | 3 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-08-12 |
| Access Restriction | Open |
| Subject Keyword | Corrosion and Materials Degradation Marine Engineering Seawater Cathodic Protection Carbon Steel Calcareous Deposit Marine Renewable Energy |
| Content Type | Text |
| Resource Type | Article |
