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Abstract In order to improve the oxidation behaviour of AISI441 ferritic stainless steel in H2/H2O atmosphere at 800 °C, four oxide coatings were tested: two perovskites (La0.8Sr0.2MnO3 and LaNi0.6Fe0.4O3) deposited by… Click to show full abstract
Abstract In order to improve the oxidation behaviour of AISI441 ferritic stainless steel in H2/H2O atmosphere at 800 °C, four oxide coatings were tested: two perovskites (La0.8Sr0.2MnO3 and LaNi0.6Fe0.4O3) deposited by screen printing and two spinels (MnCo2O4 and Co3O4) obtained by PVD technique. Isothermal oxidation tests performed up to 3000 h showed that the coating presence avoided Fe oxides growth, which occurs for the raw alloy in the same conditions. Moreover, a protective (Cr,Mn)3O4/Cr2O3 layer formed between the substrate and the coating. Any presence of Cr was not detected within the coatings, indicating that all compositions were efficient in preventing Cr evaporation.
Journal Title: Corrosion Science
Year Published: 2019
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