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中文摘要：
引言 由于海水腐蚀的严重性和复杂性，材料在海洋环境中的腐蚀数据积累及试验研究一直受到各国的重视。美国ASTM曾委托LaQue腐蚀试验中心开展了全球14个海水腐蚀站点的材料腐蚀试验，为评价世界范围内海水的腐蚀性提供了依据。我国从1958年开始开展常用金属材料海水腐蚀试验和研究工作以来，
英文摘要：
By using polarization resistance measurement and electrochemical impedance spectroscopy（EIS）,in field corrosion electrochemical detections of Q235 carbon steel and Q235 ultrafine grained steel immersed samples in Zhoushan Marine Corrosion Test Station were performed for 4 years.Dynamic corrosion data during exposure were obtained.Electrochemical detection results reflected not only the corrosion modalities and corrosion rates of the samples,but also the direct influence of marine environmental factors on the corrosion behavior.Seawater temperature was the major factor influencing the corrosion behaviors of carbon steels,and corrosion rates of these samples increased with increasing seawater temperature.The influence of seawater velocity and orientation of flow was less than that of temperature.
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