质子交换膜燃料电池不锈钢双极板表面Cr2AlC涂层的制备与耐蚀性能

刘云, 任延杰, 陈荐, 周立波, 邱玮, 黄伟颖, 牛焱

Preparation and Corrosion Resistance of Ternary Layered Compound Cr2AlC Coating on 304 Stainless Steel for Bipolar Plates of PEMFC

LIU Yun, REN Yanjie, CHEN Jian, ZHOU Libo, QIU Wei, HUANG Weiying, NIU Yan

表2 沉积Cr2AlC涂层的304不锈钢在0.01 mol/L H2SO4溶液中的电化学阻抗谱拟合结果

Table 2 Fitting results of EIS of Cr2AlC coated 304 stainless steel in 0.01 mol/L H2SO4 solution at room temperature

Time / h Rs / Ω·cm2 CPE1 Rct / Ω·cm2 CPE2 Rf / Ω·cm2 Ydl / S-α Ω-1 cm-2 ndl Yf / S-α Ω-1 cm-2 nf 2 106.0 1.604×10-5 0.676 4.228×105 5.565×105 0.939 1.900×105 8 152.8 1.116×10-5 0.673 6.316×105 6.675×105 0.942 2.799×105 48 141.1 3.687×10-5 0.872 1.841×106 5.141×105 0.985 59.27 96 165.0 3.299×10-5 0.880 2.600×106 5.984×105 0.975 100.50 264 130.8 4.116×10-5 0.936 1.122×106 8.114×105 0.960 85.28 432 131.4 7.643×10-5 0.942 2.877×105 5.363×105 0.947 41.01