专利名称：Stainless steel for polymer fuel cell
parator and method for preparing same
发明人：Jonghee Kim,Kihoon Jo,Younghwan
dha什么牌子好Kim,Jeonghe Lee,Yunyong Lee,Jinsuk五淋丸
Kim,Jongheon Seok
申请号：US15017902
申请日：20160208
中推血战撒哈拉公开号：US11047029B2
公开日：
20210629归心似箭的意思
专利内容由知识产权出版社提供
专利附图：
强制执行权摘要：There are provided a ferrite stainless steel for a polymer fuel cell parator having excellent corrosion resistance and interfacial contact resistance under an
operating environment of a polymer fuel cell, and a preparation method of the stainless steel. A stainless steel includes C: 0.02 wt % or less, N: 0.02 wt % or less, Si: 0.4 wt % or less, Mn: 0.2 wt %
or less, P: 0.04 wt % or less, S: 0.02 wt % or less, Cr: 25.0 to 32.0 wt %,Cu: 0 to 2.0 wt %, Ni: 0.8 wt % or less, Ti: 0.5 wt % or less, Nb: 0.5 wt % or less, waste Fe and inevitably contained elements. A preparation method of the stainless steel having a cond passive film formed on a surface thereof includes forming a first passive film on the surface of the stainless steel by bright-annealing or annealing-pickling the stainless steel; removing the first passive film by pickling the stainless steel in a 10 to 20 wt %如何发传真
sulfuric acid solution at a temperature of 50 to 75° C. for a predetermined time; water-washing the stainless steel; and forming the cond passive film by performing a passivation treatment on the stainless steel in the mixture of a 10 to 20 wt % nitric acid and a 1 to 10 wt % fluorine acid at a temperature of 40 to 60° C. for the predetermined time. Accordingly, it is possible to prepare a stainless steel having reduced elution resistance and excellent corrosion resistance and to produce a stainless steel for a polymer fuel cell parator, which has low interfacial contact resistance and excellent long-term performance even under a fuel cell operating condition of 60 to 150° C. and various surface roughness conditions.
申请人：POSCO
地址：Pohang-si KR
镜湖区政府
国籍：KR
代理机构：Finnegan, Henderson, Farabow, Garrett & Dunner LLP
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