RESEARCH OF THE FORMATION PROCESS OF CALCAREOUS DEPOSITS ON THE METAL SURFACE OF CATHODICALLY PROTECTED OFFSHORE STRUCTURES

Abstract

Cathodic protection is considered the effective method to protect metals from corrosion in seawater. This method of protection is often accompanied by the formation of calcareous deposits on the cathodically protected metal surface. In this study, the change of concentration of ions in the diffusion layer under the effect of DC current, the rate of formation of calcareous deposits and their composition in the mixture were studied by modeling method. Research results have shown that as the current density increases, the concentration of ions , increases, and the concentration of ions decreases. The caculation results showed that the molar components of the substances in the compound are equal at a current density of 1,4 A/m²