La0,6Sr0,4CoO3 Coating on AISI 430 Ferritic Stainless Steel for Application in ITSOFC Interconnects

Abstract

In order to restrain the high temperature oxidation on metallic interconnects, a ceramic coating is deposited on its surface. For this study a AISI 430 stainless steel was coated with perovskite (La 0,6 Sr 0,4 CoO 3 ) film using the spray pyrolysis technique. Therefore, in this work, the coating morphology and composition was evaluated through X-Ray diffraction and scanning electron microscopy/energy dispersive spectroscopy analyses. The oxidation behavior was also investigated by a high temperature oxidation test. The results obtained showed that the technique employed for the coating deposition was effective, and the resultant crystalline perovskite layer acted significantly in decreasing the oxidation of the AISI 430 stainless steel. An enrichment of Sr and Cr was also observed on the alloy-coating interface, indicating a possible perovskite coating decomposition.

Effect of the Shot Peening Process on the Corrosion and Oxidation Resistance of AISI430 Stainless Steel

“…The oxide scale growth rate is calculated by Equation 1, where M is the sample mass gain, A is the sample surface area, t is the oxidation time and Kp is the parabolic rate constant. The result of parabolic rate constant (Kp) ( Table 4) of the bare sample is consistent with values presented in studies in the literature [31][32][33] . It is observed that the Kp results (Table 4) are similar for all the samples, which demonstrate that the formation of oxide was not influenced by the difference in surface samples.…”