Electrochemical scaling of stainless steel in artificial seawater: Role of experimental conditions on CaCO3 and Mg(OH)2 formation

A Novel Approach for the Evaluation of Under Deposit Corrosion in Marine Environments Using Combined Analysis by Electrochemical Impedance Spectroscopy and Electrochemical Noise

“…Analogously, the deposits obtained in our work may originate from the following subsequent deposition stages: an initial sharp decrease in current rate is related to the formation of a thin Mg-rich layer or Mg-containing carbonate species followed by the nucleation of CaCO3 crystals and the growth of crystals until the electrode surface is fully covered. For the SS electrode deposited at -1.1 VSCE, the increasing current ratio at the start of the deposition process may be attributed to obstruction of the active sites of the deposit at the SS surface by the passive layer [45]. Additionally, instantaneous current increases are observed at different deposition times for both electrodes.…”

Failure analysis on synergistic effect of erosion and corrosion on failed fittings in specialty chemical plant. Part II: Control valve

“…Hence, the introduction of Cl − from cooling water would trigger the electronchemical corrosion in localized areas. As for the considerable alkaline earth elements, when chemical and thermodynamical conditions were gathered, the precipitation of brucite Mg(OH) 2 happened . The layer of Mg(OH) 2 incrustation limited the migration and diffusion of chloride ions, which increased the corrosion extent and then degrade the mechanical properties of the upper and outlet of the steam control valve.…”

Aragonite coating solutions (ACS) based on artificial seawater

“…The above electrochemical studies [36][37][38][39][40][41] inspired the current study and a number of aragonite coating solutions (ACS) are presented here which are completely inorganic, precipitate-free, and capable of forming aragonite, in situ, only upon heating to the typical tropical sea surface temperature of 30 • C [42,43], following 4 h of an incubation time at 30 • C. SBF (simulated [44] or synthetic [45,46] body fluid) solutions, containing Ca 2+ , Mg 2+ , K + , Na + , HPO 4 2− , HCO 3 − , SO 4 2− and Cl − , mimic the inorganic electrolyte composition of blood plasma, and were shown to deposit spherules of bone mineral-like carbonated apatitic calcium phosphate on immersed substrates when heated at the physiological temperature of 37 • C. On the other hand, Pan et al [47] provided a careful clarification on why SBF solutions would not be suitable to predict the bioactivity of synthetic biomaterials immersed in those. The abiotic ACS solutions of this study mimic the liquid in which the inorganic phase (aragonite) of coral reefs or mollusc shells are forming.…”