甲基磺酸体系高速电镀锡过程中铂镀层阳极的电化学行为  

Electrochemical behavior of platinum-plated anode during high-speed tin electroplating in methanesulfonic acid-based bath

作　　者：王志登 徐烨明[1] 黄文华[1] 王贵领 WANG Zhideng;XU Yeming;HUANG Wenhua;WANG Guiling(Shanghai Meishan Iron&Steel Co.,Ltd.,Nanjing 210039,China;Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]上海梅山钢铁股份有限公司,江苏南京210039 [2]哈尔滨工程大学,黑龙江哈尔滨150001

出　　处：《电镀与涂饰》2024年第10期1-8,共8页Electroplating & Finishing

摘　　要：[目的]考察铂镀层阳极替代铱涂层阳极应用于甲基磺酸(MSA)体系高速镀锡的可行性。[方法]对比了铂镀层阳极和铱涂层阳极的表面形貌和三维轮廓,通过阳极极化曲线测试、动电位电化学阻抗谱和多电流阶跃测试研究了两种不溶性阳极在MSA体系高速镀锡中的电化学行为,并检测了二者的使用寿命。[结果]与铱涂层阳极相比,铂镀层阳极表面晶粒较细致,但表面粗糙度更大。在MSA镀液中添加具有晶粒细化作用的添加剂和抗氧化剂能够增强铂镀层阳极的极化行为,但对铱涂层阳极极化行为的影响不大。两种阳极在MSA体系高速镀锡过程中的反应都以析氧为主。阳极寿命与电流密度有关,10~30 A/dm^(2)的低电流密度有利于铂镀层阳极的长寿命发挥。铂镀层阳极和铱涂层阳极对MSA镀液关键性能的影响基本一致。[结论]铂镀层阳极适用于MSA体系高速镀锡。[Introduction]The feasibility of Pt-plated anode as an alternative to Ir-coated anode for high-speed tin electroplating in methanesulfonic acid(MSA)needs to be studied.[Method]The surface morphologies and three-dimensional profiles of Pt-plated anode and Ir-coated anode were compared.The electrochemical behaviors of the two types of insoluble anodes during high-speed tin electroplating in MSA-based bath were studied by anodic polarization curve measurement,potentiodynamic electrochemical impedance spectroscopy,and multi-current step chronopotentiometry.The service lives of both anodes were also examined.[Result]Compared with Ir-coated anode,Pt-plated anode had finer grains but greater surface roughness.The addition of grain refiner and antioxidant to MSA-based bath could enhance the polarization behavior of Pt-plated anode,but had little effect on the polarization behavior of Ir-coated anode.The reactions of both anodes during high-speed tin electroplating in MSA-based bath were dominated by oxygen evolution.Anode life was related to the adopted current density.Low current density i.e.10 to 30 A/dm^(2)was beneficial for the long-term service life of Pt-plated anode.The impact of Pt-plated anode and Ir-coated anode on the key properties of MSA-based bath was essentially the same.[Conclusion]Pt-plated anode is suitable for high-speed tin electroplating in MSA-based bath.

关 键 词：铂镀层阳极 铱涂层阳极 甲基磺酸 高速镀锡 电化学行为 析氧反应 

分 类 号：TQ153.13[化学工程—电化学工业]