Evaluation of Epoxy Coating for Ballast Tanks under Thermal Cycling by Electrochemical Impedance Spectroscopy
Evaluation of Epoxy Coating for Ballast Tanks under Thermal Cycling by Electrochemical Impedance Spectroscopy
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DOI：
10.2355/isijinternational.isijint-2016-228
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发表时间：
2016-11
影响因子：
1.8
通讯作者：
H. Hayashibara;E. Tada;A. Nishikata
中科院分区：
文献类型：
--
作者：
H. Hayashibara;E. Tada;A. Nishikata
商船需要良好的防腐蚀保护，因为它们暴露在严重的腐蚀环境中。有机涂层和阴极保护是防止船舶腐蚀的主要手段。压载水舱（WBT）是商用货船中可能暴露于腐蚀性最强的环境中的舱室之一。WBT配备有通过向空船填充海水来使空船稳定的装置，并且WBT中的海水在货物装载期间被排放到船外。因此，WBT材料既要浸泡在海水中，又要承受高相对湿度。WBT中采用的涂层钢在暴露于较高温度的上甲板背面和加热液舱背面严重退化。1）此外，上甲板背面不适用牺牲阳极阴极保护，因为在使用期间，上甲板背面未浸没在压载水中。WBT也是船舶结构的一部分，对船舶的强度起着重要的作用。因此，评价WBT涂层的防护性能对于维护结构安全是必要的。电化学阻抗谱法评价压载水舱环氧涂层的热循环性能
Commercial ships require good corrosion protection since they are exposed to severe corrosive environments. Organic coatings and cathodic protection are major tools for preventing the corrosion of ships. The water ballast tank (WBT) is one of the compartments that might be exposed to the most corrosive environment in a commercial cargo ship. The WBT is equipped to make an empty ship stable by filling it with sea water, and sea water in the WBT is discharged overboard during cargo loading. Thus, the WBT materials are subjected to both immersion in sea water and high relative humidity. The coated steels employed in the WBT are severely degraded at the back side of the upper deck and the back side of the heated liquid tank, which are exposed to higher temperatures.1) In addition, cathodic protection by a sacrificial anode is not available for the back side of the upper deck because it is not immersed in the ballast water during service periods. The WBT is also a part of the ship structure and plays an important role in the strength of the ship. Therefore, evaluating the protective performance of the WBT coating is necessary for maintaining structural Evaluation of Epoxy Coating for Ballast Tanks under Thermal Cycling by Electrochemical Impedance Spectroscopy