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Ferritic stainless steel for use as separators of polymer electrolyte fuel cells and polymer electrolyte fuel cells
Ferritic stainless steel for use as separators of polymer electrolyte fuel cells and polymer electrolyte fuel cells
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机译:用作聚合物电解质燃料电池和聚合物电解质燃料电池隔板的铁素体不锈钢
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摘要
A ferritic stainless steel for use as separators of polymer electrolyte fuel cells (PEFCs) has a composition consisting of by mass, 0.020% or less of C, 0.50% or less of Si, 0.50% or less of MA, 0.020-0.080% of P, 0.005% or less of S, 0.50% or less of Ni, 28-32% of Cr, 0.3-2.5% of MD, 0.80% or less of Cu, 0.03-0.25% of Nb, 0.03-0.25% of Ti, 0.04-0.20% of Al, 0.020% or less of N, optionally 0.2-1.0% of V and the balance being Fe except inevitable impurities with C+N being 0.025% or less and Ni+Cu being 0.80% or less. The stainless steel separator maintains low contact resistance in a state exposed to a wet and acidic environment inside a fuel cell for a long while with less metal dissolution.
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