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Effects of flow velocity on electrochemical behavior of seachest 5083-H116 Al alloy for ship 被引量:1
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作者 Seung-Jun LEE Seong-Jong KIM 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第8期1703-1709,共7页
Electrochemical behavior of 5083-H116 Al alloy with flow velocity of seachest material for Al ship was evaluated.To examine the electrochemical characteristics of flow velocity and its effects on the performance of th... Electrochemical behavior of 5083-H116 Al alloy with flow velocity of seachest material for Al ship was evaluated.To examine the electrochemical characteristics of flow velocity and its effects on the performance of the alloy,experiments were conducted at four flow velocity variables using static state with an agitator.An ultrasonic vibration generator using piezoelectric effect was used in cavitation test according to the requirements of in ASTM-G32.The results show that the corrosion current density and damage were increased by applying the flow velocity compared to static state.Therefore,it is determined that the case of applying flow velocity is weaker to the corrosion. 展开更多
关键词 aluminium ships over-protection marine growth prevention system sea-chest flow velocity
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美国媒体素养教育理念变迁分析——从“保护主义”到“超越保护主义”
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作者 陈明英 《郑州师范教育》 2013年第4期10-15,共6页
美国的媒体素养教育实施时间并不长,但积累的丰富经验值得中国借鉴。本文主要从文化观念、媒介生态环境以及师生角色定位三方面分析了美国的媒体素养教育从"保护主义"到"超越保护主义"的变迁过程,以期为中国媒体素... 美国的媒体素养教育实施时间并不长,但积累的丰富经验值得中国借鉴。本文主要从文化观念、媒介生态环境以及师生角色定位三方面分析了美国的媒体素养教育从"保护主义"到"超越保护主义"的变迁过程,以期为中国媒体素养教育的发展提供借鉴。 展开更多
关键词 美国 媒体素养教育 保护主义 超越保护主义
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