Study on the Parameters of MAPLE and PLD Coating Technologies for Optimal Corrosion Resistance of MnTa<sub>2</sub>O<sub>6</sub> Pseudo-Binary Oxide and 5,10-(4-Carboxy-Phenyl)-15,20-(4-Phenoxy-Phenyl)-Porphyrin Thin Film Coating System

Abstract

This paper presents the results of factorial experiment applied to optimize Matrix‑Assisted Pulsed Laser Evaporation (MAPLE) and Pulsed Laser Deposition (PLD) coating technologies used to improve the corrosion resistance of steels. MnTa2O6 pseudo-binary oxides and 5,10-(4-carboxy-phenyl)-15,20-(4-phenoxy-phenyl)-porphyrin was used for these experiments to obtained thin film coating system of hybrid nanostructures. Based on factorial experiments, correlations between the main technological parameters of the coating process (MAPLE laser energy EMAPLE [mJ], PLD laser energy EPLD [mJ]) and porphyrin concentration and the main related property of the coating system (corrosion protection factor) were determined. The base material used as substrate in the experiments was S235JR+C. Electrochemical measurements showed that by applying the appropriate parameters of the coating technologies, homogeneous layered sandwich thin films were obtained and corrosion rate was reduced by more than 7 times.