Molten salts type 304 stainless steel

A dense and electronically insulating layer of LiA102 is not suitable for providing corrosion resistance to the cell current collectors because these components must remain electrically conductive. The typical materials used for this application are 316 stainless steel and chromium plated stainless steels. However, materials with better corrosion resistance are required for longterm operation of MCFCs. Research is continuing to understand the corrosion processes of chromium in molten carbonate salts under both fuel gas and oxidizing gas environments (23,25) and to identify improved alloys (29) for MCFCs. Stainless steels such as Type 310 and 446 have demonstrated better corrosion resistance than Type 316 in corrosion tests (29). 

Bench-Scale Test Apparatus. A schematic diagram of the bench-scale test apparatus is shown in Figure 2. This apparatus is used to test the feasibility of gasifying wastes before pilot-scale tests are performed. The waste throughput of the bench-scale apparatus is 1 to 3 kg h-1 (2 to 6 lb/h), Approximately 5.5 kg (12 lb) of molten salt are contained in a 15-cm ID by 76-cm high alumina tube placed inside a type 321 stainless steel... 

X. X. Keiser, The Corrosion Resistance of Type 316 Stainless Steel to Li2BeF4, ORNL/TM-5782, and Compatibility Studies of Potential Molten Salt Breeder Materials in Molten Fluoride Salts, ORNL/TM-5783, Oak Ridge National Laboratory (1977). 

The compatibility of INOR-8 and sodium is adequate in the temperature range presently contemplated for molten-salt reactor heat-exchanger operation. At higher temperatures, mass transfer could become a problem, and therefore the fabrication of duplex tubing has been investigated. Satisfactory duplex tubing has been made that consists of Inconel clad with type-316 stainless steel, and components for a duplex heat exchanger have been fabricated, as shown in Fig. 13-20. 

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