Protective Coatings for Ferritic Stainless Steel Interconnects

Conductive/Protective Coatings for Ferritic Stainless Steel Interconnects 

Pure Co spinel (i.e., C03O4) also exhibits good high temperature electronic conductivity and CTE compatibility with ferritic steels 45 Deng et al.55 used a sulfate/chloride-based Co plating bath to coat 

In Wei et al. s work,51 after 7 days of oxidation at 750°C, a relatively thick layer ft-5-1 Opm) of Cr-rich oxide formed under the Co-Mn and Cu-Mn spinel layers. Although such thick chromia scales are likely vulnerable to break down in long term or at higher temperatures, no anomalous oxidation behavior was reported. Similarly, in Deng et al. s work55 from the same research group, 5-7-pm-thick Cr-rich oxides formed under the Co spinel layer. 

In the case of Co/LaCr03,6° a triple layer scale consisting of a Cr-rich subscale, a Co-Fe spinel midlayer, and a C03O4 spinel top layer was observed after oxidation at 800°C in air.60 It was determined that LaCrC 3 particles significantly decrease the specific 

Both Ni/LaCr03 and Co/LaCrC 3 coatings performed as reliable barriers against Cr outward diffusion. Low, stable ASR values of 0.005 2 cm2 (after 400 h) and 0.02 2 cm2 (after 900 h) at 800°C in air were reported for Ni/LaCr0358 and Co/LaCr036° composite coatings, respectively. 

---