TY - JOUR
AU - Galván-Martínez, Ricardo
AB - In seawater, carbon steels suffer severe corrosion damage that causes significant economic losses. To control this damage, the use of cathodic protection is essential, an effective method generally favored by calcareous depositions on the metallic substrate when the structures are submerged. To analyze the kinetics of these deposits on different metals, large perturbations of potential, temperature, ion content, etc. have been applied in the laboratory. However, a study of the variability of physicochemical parameters with real values focused on measuring the efficiency of the protection systems operating with a real protection criterion, had not been carried out. This research contemplated the previous objection as its aim. To achieve it, a multiple impressed current cathodic protection system was used to ensure the integrity of API X70 steel specimens by the same protection potential. Using electrochemical techniques (RP, EIS, and CP) and scanning electron microscopy (SEM) techniques, the efficiency of these systems was determined in correlation with the evolution of calcareous deposits. The results revealed that normal seawater conditions and their slight variations provide tolerant environments for performing the protection systems, with maximum deficiencies of - 52% and benefits of up to 59% (considering 0% normal operation conditions). Micrographs corroborated all the calcareous products formed got with SEM. This work showed that the physicochemical variability of seawater affects the performance of cathodic protection and that we need new criteria to counteract these effects.
TI - Effect of seawater pH variation on the growth of calcareous deposits and its effect on an impressed current cathodic protection system
JF - Journal of Solid State Electrochemistry
DO - 10.1007/s10008-023-05581-z
DA - 2023-11-01
UR - https://www.deepdyve.com/lp/springer-journals/effect-of-seawater-ph-variation-on-the-growth-of-calcareous-deposits-7e3pO4RXVX
SP - 3003
EP - 3016
VL - 27
IS - 11
DP - DeepDyve
ER -