【摘要】 采用电弧离子镀技术(AIP)在316L不锈钢表面沉积Ti/Cr/Cr N多层结构改性层。扫描电子显微镜观察到涂层表面形貌致密且完整。接触电阻测试表明,改性样品的界面导电性显著提高。在70℃下,0.5 mol/L H2S O4溶液中进行腐蚀实验,动电位测试中,改性样品的腐蚀电位高于316L不锈钢基材,腐蚀电流显著降低;模拟阴极的恒电位测试中,改性样品的腐蚀电流较316L基材降低,模拟阳极的恒电位测试中,改性样品处于阴极保护状态。经恒电位和动电位极化后,涂层表面形貌完整,没有观察到明显的破损,改性涂层样品表现出较好的稳定性。更多还原

【Abstract】 Ti/Cr/CrN multilayer were deposited on 316 L stainless steel as bipolar plate for proton exchange membrane fuel cells（PEMFCs） by arc ion plating（AIP）. The multilayer coating was dense and continuous, which was analyzed by SEM. The interfacial contact resistance（ICR） test results show that interfacial conductivity between the coated sample and carbon paper is increased significantly. Corrosion was conducted in 0.5 mol/L H₂SO₄ at 70 ℃. In the potentiodynamic tests, corrosion current of the coated sample is reduced compared with the 316 L substrate. In the potentiostatic tests simulating the anodic environment, the coated sample was protected by cathode. None obviously evidence of corrosion was observed in the multilayer coating after corrosion tests. The results mean that the multilayer coating is stable at PEMFC working conditions.更多还原