水轮机常用金属材料在模拟海水中的电化学行为研究  

Electrochemical Analysis of Typical Metals in Hydroturbine Tested in Artificial Seawater

作　　者：李景[1,2,3] 程广福[1,2,3] 贾朋刚[1,2,3] 葛光男[1,2] 过洁[1,2,3] 王辉亭[1,2,3] 

机构地区：[1]水力发电设备国家重点实验室,哈尔滨150040 [2]哈尔滨大电机研究所,哈尔滨150040 [3]国家水利发电设备工程技术研究中心,哈尔滨150040

出　　处：《大电机技术》2013年第5期51-54,共4页Large Electric Machine and Hydraulic Turbine

摘　　要：随着能源需求的日益紧张,海洋能的利用受到了各国的广泛关注,对海洋能发电设备的需求也日益迫切。现有的水力发电设备常用金属材料能否满足海洋腐蚀性介质中的应用值得探讨。本文利用电化学工作站对人工海水介质中水轮机常用金属ZG00Cr13Ni4Mo,0Cr18Ni9,1Cr18Ni9Ti,Q235,Q345B等的腐蚀极化曲线、交流阻抗谱进行了测量,并且利用扫描电子显微镜对腐蚀极化曲线测试后样品的表面形貌进行了观察。结果表明,碳钢Q235和Q345B自腐蚀电位较低,耐腐蚀性较差。而奥氏体不锈钢0Cr18Ni9和1Cr18Ni9Ti自腐蚀电位和钝化膜击破电位较高,钝化区较宽,耐腐蚀性较好。水轮机过流部件常用材料ZG00Cr13Ni4Mo自腐蚀电位和钝化膜击破电位较低,存在较为严重的点腐蚀现象,在海洋能发电设备应用中应配合有效的防腐措施。With the increase of energy assumption, development of ocean energy technology and ocean energy conversion equipment with high efficient are highly demanded all over the world. Therefore, it is necessary to research the application of metal materials commonly used in hydroturbine. In this paper, electrochemical workstation was utilized to measure the polarization curves and electrochemical impedance spectroscopy （EIS） of metals including ZG00Crl3Ni4Mo, 0CrlSNi9, 1Crl8Ni9Ti, Q235, Q345B in artificial seawater. Furthermore, scanning electron microscope （SEM） was applied to observe the pitting behaviors of specimens made of ZG00Crl3Ni4Mo and 0Crl8Ni9, respectively. The results show that the corrosion potential of carbon steel （Q235 and Q345B） is low~ While the austenite stainless steels （0Crl9Ni9 and 1Crl 8N9Ti） show higher corrosion potential and passivating film breakdown potential comparing to martensite stainless steel ZG00Crl3Ni4Mo. It is recommended that the effective anti-corrosion method shall be adopted to prevent the flow passing parts made of ZG00Crl3Ni4Mo from corrosion.

关 键 词：水轮机 极化曲线 交流阻抗谱 点腐蚀 

分 类 号：TK730.5[交通运输工程—轮机工程]