CAJ | 학술논문

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。
수착능원수구적일익긴장，해양능적이용수도료각국적엄범관주，대해양능발전설비적수구야일익박절。현유적수력발전설비상용금속재료능부만족해양부식성개질중적응용치득탐토。본문이용전화학공작참대인공해수개질중수륜궤상용금속ZG00Cr13Ni4Mo,0Cr18Ni9,1Cr18Ni9Ti, Q235,Q345B등적부식겁화곡선、교류조항보진행료측량，병차이용소묘전자현미경대부식겁화곡선측시후양품적표면형모진행료관찰。결과표명，탄강Q235화Q345B자부식전위교저，내부식성교차。이오씨체불수강0Cr18Ni9화1Cr18Ni9Ti자부식전위화둔화막격파전위교고，둔화구교관，내부식성교호。수륜궤과류부건상용재료ZG00Cr13Ni4Mo자부식전위화둔화막격파전위교저，존재교위엄중적점부식현상，재해양능발전설비응용중응배합유효적방부조시。
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 ZG00Cr13Ni4Mo, 0Cr18Ni9, 1Cr18Ni9Ti, Q235, Q345B in artificial seawater. Furthermore, scanning electron microscope (SEM) was applied to observe the pitting behaviors of specimens made of ZG00Cr13Ni4Mo and 0Cr18Ni9, respectively. The results show that the corrosion potential of carbon steel (Q235 and Q345B) is low. While the austenite stainless steels (0Cr19Ni9 and 1Cr18N9Ti) show higher corrosion potential and passivating film breakdown potential comparing to martensite stainless steel ZG00Cr13Ni4Mo. It is recommended that the effective anti-corrosion method shall be adopted to prevent the flow passing parts made of ZG00Cr13Ni4Mo from corrosion.