Avram Diana N, Davidescu Corneliu M, Dan Mircea L, Mirza-Rosca Julia C, Hulka Iosif, Pascu Alexandru, Stanciu Elena M
Faculty of Industrial Chemistry and Environmental Engineering, CAICAM Department, Politehnica University Timişoara, Blvd. V. Pârvan, nr. 6, 300223 Timişoara, Romania.
Renewable Energy Research Institute-ICER, Politehnica University Timisoara, 138 Gavril Musicescu Street, 300774 Timişoara, Romania.
Materials (Basel). 2022 Aug 4;15(15):5364. doi: 10.3390/ma15155364.
In this work, the corrosion behavior of NiCr(Ti) protective coatings deposited on mild steel substrates through laser cladding technology is studied as an alternative new material for metallic bipolar plates used in PEMFC applications. For electrochemical testing, a solution consisting of 0.5 M HSO + 2 ppm F at room temperature is used as an electrolyte. The fluoride ions are added to simulate the conditions in the PEM fuel cell due to degradation of the proton exchange membrane and fluoride release. A saturated calomel electrode (SCE) is used as a reference electrode and a platinum mesh as the counter electrode. Scanning electron microscopy (SEM) and optical microscopy (OM) are used for studying the morphology of the protective coatings and the effect of Ti addition. The electrochemical evaluation consisted of measuring the open circuit potential (OCP), followed by electrochemical impedance spectroscopy measurements (EIS) and potentiodynamic polarization. It is found that the coatings with 5% Ti, 7% Ti and 10% Ti addition comply with the conditions of the US DOE regarding corrosion performance to be used as materials for the manufacture of the bipolar plates.
在这项工作中，研究了通过激光熔覆技术沉积在低碳钢基体上的NiCr(Ti)防护涂层的腐蚀行为，作为用于质子交换膜燃料电池（PEMFC）应用的金属双极板的一种新型替代材料。对于电化学测试，使用由0.5 M HSO + 2 ppm F组成的溶液在室温下作为电解质。添加氟离子是为了模拟质子交换膜降解和氟释放导致的PEM燃料电池中的条件。使用饱和甘汞电极（SCE）作为参比电极，铂网作为对电极。扫描电子显微镜（SEM）和光学显微镜（OM）用于研究防护涂层的形态以及Ti添加的影响。电化学评估包括测量开路电位（OCP），随后进行电化学阻抗谱测量（EIS）和动电位极化。发现添加5% Ti、7% Ti和10% Ti的涂层符合美国能源部关于用作双极板制造材料的腐蚀性能条件。
