Anticorrosive treatment method for a separator of molten carbona

Details Anticorrosive treatment method for a separator of molten carbona Anticorrosive treatment method for a separator of molten carbona

1997-05-29

2000-07-18

Wyszomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Producing or treating layered, bonded, welded, or...

148530, 148531, 148535, 429 34, C23C 418, C23C 1656, C23C 1831

Patent

active

060902280

ABSTRACT:
An anticorrosive treatment method for a separator of a molten carbonate fuel cell is provided. As conventional anticorrosive treatment methods for a wet-seal area in an separator, there are a molten aluminium coating method, a physical vapor deposition method, a slurry coating method, a spray coating method, a pack cementation method and a vacuum evaporation method. Defects due to high temperature thermal treatment corrodes even stainless steel base materials to thus shorten the lifetime of the fuel cell. Further, to sufficiently assure an anticorrosive capability of the separator wet-seal area, a coating ratio should be heightened finally, which makes fabrication of the large-area separator difficult, and manufacturing costs high. To solve the conventional problems, nickel and aluminium are coated in turn on a base material of stainless steel or an thin aluminium film is coated or bonded thereon to then perform diffusion process, which simplifies a manufacturing process and lowers a manufacturing cost. Since the coating is accomplished by diffusion, a coating layer having an excellent anticorrosive capability and junction ability with respect to the base material can be obtained. The anticorrosive capability can be maintained even in the high temperature carbonate due to the long lifetime of the fuel cell.

REFERENCES:
patent: 4150178 (1979-04-01), Yagi et al.

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