低电导率冷却液在氢燃料电池系统的应用

Application of low conductivity coolant in hydrogen fuel cell system

为扩大低电导率冷却液在氢燃料电池系统的应用,对系统中常用的金属材料在低电导率乙二醇冷却液中的腐蚀性进行试验研究和评估,包括电化学测试、静态腐蚀试验、动态腐蚀试验和装车试验,并针对系统常用的非金属材料开展冷却液相容性试验研究。最终的装车试验结果表明,铝合金3A21、铝合金5A05、铝合金6063、不锈钢316L、紫铜、黄铜和钎焊片的质量变化均小于±10 mg/片;相容性试验结果表明,三元乙丙橡胶、氟橡胶、丁腈橡胶、聚乙烯树脂、聚丙烯树脂、聚四氟乙烯树脂的质量变化均小于±5%。该研究为扩大低电导率乙二醇冷却液在氢燃料电池系统的应用提供参考。

In order to expand the application of low-conductivity coolant in hydrogen fuel cell systems,experimental studies and evaluations on the corrosiveness of metal materials commonly used in the system in low-conductivity glycol coolant were carried out,including electrochemical tests,static corrosion tests,dynamic corrosion test and loading test,and carried out the coolant compatibility test research for the non-metallic materials commonly used in the system.The final loading test results show that the quality changes of aluminum alloy 3A21,aluminum alloy 5A05,aluminum alloy 6063,stainless steel316L,copper,brass and brazing sheet are all less than±10 mg/piece;the compatibility test results show that the mass changes of ethylene-propylene-diene monomer rubber(EPDM),fluorine rubber,nitrile rubber,polyethylene resin(PE),polypropylene resin(PP)and polytetrafluoro-ethylene resin(PTFE)are all less than±5%.This study provides a reference for expanding the application of low-conductivity ethylene glycol coolant in hydrogen fuel cell systems.