An investigation into nickel implanted 316L stainless steel as a bipolar plate for PEM fuel cell
An investigation into nickel implanted 316L stainless steel as a bipolar plate for PEM fuel cell
复制标题
植入镍316L不锈钢作为质子交换膜燃料电池双极板的研究
DOI：
10.1016/j.jpowsour.2008.03.088
复制
发表时间：
2008-07-15
影响因子：
9.2
通讯作者：
Cai, Xun
中科院分区：
文献类型：
--
作者：
Feng, Kai;Shen, Yao;Cai, Xun
用离子注入法在316L奥氏体不锈钢表面形成了一层厚度约100 μ m的富镍层，并改善了其导电性能。采用动电位法研究了离子注入对不锈钢316 L在0.5 M H_2SO_4和2 ppm HF溶液中的腐蚀行为的影响。为了研究离子注入SS 316 L的化学稳定性，在加速阴极环境中进行恒电位测试，并通过电感耦合等离子体原子发射光谱仪（ICP-AES）分析恒电位测试后的溶液。动电位测试结果表明，当离子注入剂量为3 × 10 ~（11）ions·cm ~（-2）时，在阳极环境中，不锈钢316 L的腐蚀电位由-0.3Vvs·SCE正移到-0.05Vvs·SCE;在阴极环境中，不锈钢316 L的0.6V钝化电流密度由11.26 μ Acm ~（-2）降低到7.00 μ Acm ~（-2）。恒电位测试结果表明，由于钝化层中金属Ni含量的增加，注入镍的SS 316L在加速阴极环境中的化学稳定性比裸SS 316L高。ICP结果与电化学测试结果一致，即裸SS 316L在阴极和阳极环境中都具有最高的溶解速率，并且Ni离子注入显著降低了溶解速率。与裸SS 316L相比，注入镍后的SS 316L的界面接触电阻（ICR）有了显著的改善，这是由于注入镍后钝化层厚度减小所致。植入样品的ICR值随剂量增加而增加。(c)2008 Elsevier B. V.保留所有权利。
A nickel-rich layer about 100 ILm in thickness with improved conductivity was formed on the surface of austenitic stainless steel 316L (SS316L) by ion implantation. The effect of ion implantation on the corrosion behavior of SS316L was investigated in 0.5 M H2SO4 with 2 ppm HF solution at 80 degrees C by potentiodynamic test. In order to investigate the chemical stability of the ion implanted SS316L, the potentiostatic test was conducted in an accelerated cathode environment and the solutions after the potentiostatic test were analyzed by inductively coupled plasma atomic emission spectrometer (ICP-AES). The results of potentiodynamic test show that the corrosion potential of SS316L is shifted toward the positive direction from -0.3 V versus SCE to -0.05 V versus SCE in anode environment and the passivation current density at 0.6V is reduced from 11.26 to 7.00 mu Acm(-2) in the cathode environment with an ion implantation dose of 3 x 1011 ions cm(-2). The potentiostatic test results indicate that the nickel implanted SS316L has higher chemical stability in the accelerated cathode environment than the bare SS316L, due to the increased amount of metallic Ni in the passive layer. The ICP results are in agreement with the electrochemical test results that the bare SS316L has the highest dissolution rate in both cathode and anode environments and the Ni implantation markedly reduces the dissolution rate. A significant improvement of interfacial contact resistance (ICR) is achieved for the SS316L implanted with nickel as compared to the bare SS316L, which is attributed to the reduction in passive layer thickness caused by the nickel implantation. The ICR values for implanted specimens increase with increasing dose. (c) 2008 Elsevier B.V. All rights reserved.