Formation of calcareous deposits in the tidal zone and its effect on cathodic protection

Abstract Using the wire beam electrode technique, electrochemical impedance spectroscopy, energy-dispersive X-ray formation of calcareous deposits in a tidal zone and its effects on corrosion protection Q235 steel under cathodic were studied. Results showed that production aragonite CaCO 3 crystals significantly reduced from immersion to high-tide zone, protective performance deposited layer weakened, metal intensified. In current density decreased, potential shifted negatively, indicating was enhanced effectively protected. stratified, porosity increased by dry-wet cycling. During flood tide, reaction is accelerated near waterline, which promotes loss sacrificial anode water.