Oxidation Behavior and Electrical Conductivity Between Ln_(0.8)Sr_(0.2)MnO_3 Cathode and Crofer 22 APU with Spinel Coatings

摘要

The modified method of electrostatic spray pyrolysis was designed to apply protective coatings based on Mn-Co spinel to ferritic stainless steels (Crofer22APU and 08X18T1). The comparative thermogravimetric (TG) studies of ferritic stainless steels with and without protective coatings were carried out. The electrochemical characteristics of protective coatings exposed to long current loading were studied. The formation of the Mn-Cr spinel was observed and studied at the contact between the ferrite stainless steel and the Mn-Co spinel. The coatings of Mn-Co spinel were shown preventing formation of continuous Cr_2O_3 oxide film on the stainless steel surface.