Electrochemical synthesis of calcium carbonate coatings on stainless steel substrates

Calcite CaCO3 has been electrocrystallized on stainless steel substrates by the galvanostatic cathodic reduction of aqueous calcium bicarbonate solutions. The deposition is controlled by pH changes occurring close to the cathode due to electrogeneration of base. The deposit morphology varies from facetted rhombs observed at low (1–20 mA cm−2) current densities to corner-rounded particles observed at high (40 mA cm−2) current densities.