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Phone: (801) 972-2455

Ceramatec, Inc.
2425 South 900 West
Salt Lake City, UT 84119

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High Temperature Coatings
With Low Electrical Resistivity

Typical high temperature, corrosion resistant alloys form an oxide phase on their surface at the service temperature, which prevents the alloy from additional corrosion. However, such oxide scales are electrically insulating and thus unsuitable for use as interconnects. In applications such as high temperature fuel cells, metallic components are used as the interconnects to make electrical contacts between cells. Alloys that form a conductive scale are chromium based alloys. At the expected stack operating temperature the chromia scale continues to grow and add to the interfacial electrical resistance, as well as evaporate and condense on the cathode to deactivate the cathode. Both mechanisms lead to stack performance degradation.

Ceramatec has developed a surface treatment technique that reduces the growth rate of oxide scale to improve the life time at the high use temperatures.