Molten carbonate corrosion of a 13-Cr ferritic stainless steel protected by a perovskite conversion treatment: Relationship with the coating microstructure and formation mechanism

Composite Cu-LaFeO3Conversion Coatings on a 18Cr Ferritic Stainless Steel for IT-SOFC Interconnects: An Investigation on Structure and Formation Mechanism

“…In order to closely follow the kinetics of passivation, the steel samples were used as flag electrodes prepared as previously described. 11,12 The evolution of the open circuit potential was measured versus a gold wire pseudo-reference electrode at a sampling rate of 0.05 point per second by using a Solartron 1286 Electrochemical Interface potentiostat/galvanostat supported by the CorrWare/CorrView-Lab Software. The purpose of these preliminary experiments was to evaluate through electrochemical methods, beside morpho-structural analyses, the differences among the evaluated salts, in order to find optimal bath composition and operating conditions.…”

“…11,12 Dense, well-adhering, Cr-free and corrosion protective lanthanum iron perovskite layers on both austenitic and ferritic stainless steels have been obtained with this chemical conversion method. 11,12 Evidence has been also provided that acid-base properties and chemical composition of the salt bath may strongly affect structural and surface characteristics of the conversion coating, allowing a versatile morphologytuned synthesis of the coating layer: for instance, our previous work 10 demonstrates that submicron-range layered La/Fe perovskite coatings can be applied with the molten carbonate method by using appropriate reaction conditions. Surface electrical properties have been studied on coated Crofer 22H and Sanergy HT steels, that are 22Cr ferritic alloys specifically designed for IT-SOFC interconnect applications.…”

“…12,29 For instance, CuO can be considered a relatively stable material in typical cathode molten carbonate fuel cell conditions with a reported equilibrium solubility value of 2 × 10 −3 mol % at 600…”

Catalytic combustion of methane by perovskite-type oxide nanoparticles as pollution prevention strategy

“…Perovskite oxides have the general formula ABO 3 , where A and B are metal ions with different size: B ions are small transition metals that form BO 6 octahedra corner sharing; while A ions are large alkali, alkaline-earth or rare-earth ions that fill interstices into the three-dimensional network of BO 6 octahedra [10]. These oxides belong to a class of material of high technological interest in industrial, energetic and environmental sector, playing a key role on chemical sensor, fuel cell solid oxide, protective coating and radionuclide immobilization technologies [11][12][13][14]. The high versatility of perovskite oxides came from the high termo-chemical stability and the multifarious chemical composition leading to materials with useful catalytic, electrical, magnetic, ferroelectric or piezoelectric properties.…”

Combustion synthesis of LaFeO3 sensing nanomaterial

“…For addressing that issue, engineering research has been focusing on nuclear and fuel cell technologies [1][2][3][4][5][6]. However, since nuclear waste management [7,8] and fuel cell reliability [9][10][11][12][13][14] are unresolved challenges, these technologies appear to be unsustainable and unfeasible.…”