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(CO, Mn) 3O4 spinel coating is used to protect metal interconnection from thermal conversion of Electrodeposited co-mn3o4 composite coating

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Document pages: 8 pages

Abstract: CO and co-mn3o4 precursor coatings were prepared on the surface of ferritic stainless steel E-Brite by electrodeposition. The electroplated samples were exposed to air at 800 ° C for different times (i.e. 10 minutes)   min and 4   h) to heat convert the deposited layer to spinel coating. The conversion layer was characterized by scanning electron microscopy energy dispersive spectroscopy (SEM EDS) and X-ray diffraction (XRD). The results show that after 10   heat treatment, the cobalt plating layer is not completely oxidized and transformed into a double-layer microstructure with inner coo layer and outer Co3O4 layer, while for co-mn3o4 layer, Mn3O4 particles are not completely dissolved in the oxide layer. After four points   exposure for H, the surface layer is completely transformed into Co3O4 or (CO, Mn) 3O4spinel coating. Though the Mn content in (Co,Mn)3O4 was relatively low, the Mn-doped spinel coating was advantageous over the pure cobalt spinel coating, as the thermally grown Cr2O3 scale at the coating substrate interface was more compact and protective. Co diffusion from the deposited layer into the alloy substrate was observed for both coatings.

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