| 李 岩,秦永坤,刘欣昕,朱锡昶.国内某高水头船闸人字门运行近20年后腐蚀状况评价及原因分析*[J].水运工程,2024,(11):115-122 |
| 国内某高水头船闸人字门运行近20年后腐蚀状况评价及原因分析* |
| Corrosion evaluation and reason of miter gates of a domestic high head ship lock after serving for almost 20 years |
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| DOI： |
| 中文关键词: high head ship lock miter gate corrosion evaluation corrosion reason |
| 英文关键词: |
| 基金项目:中央级公益性科研院所基本科研业务费专项资金资助项目（Y422006） |
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| 中文摘要: |
| During the suspended shipping period of a domestic ship lock,corrosion situations of its miter gates are fully detected.The corrosion level evaluation and the reasons analyses of coating blistering and steel gate corrosion are conducted corresponding to the region divided on basis of the position of anti-corrosion coating on the miter gate,namely atmosphere zone,water level fluctuation zone and submerged zone,respectively.The results show that coating blistering is commonly presented on the miter gate of this ship lock and the corrosion below blistering layer became gradually prominent as the coating effective life approaches.The total area of coating damage regions is in the proportion of 6.5%-12.7% of the miter gates.In general,the damage and failure process of protection coating on the miter gate can be separated into three stages:blistering of organic coating,corrosion development of thermal spraying aluminum layer,consumption of aluminum layer acted as sacrificial anode to suppress local corrosion of steel substrate.Moreover,it is pointed out that a long-term anti-corrosion effect is difficult to be achieved with piecemeal coating repair.An alternative method with respect to prolonging the service life of miter gates,including overall maintenance of anti-corrosion coating and the application of cathodic protection is proposed in present work. |
| 英文摘要: |
| 高水头船闸；人字门；腐蚀评估；腐蚀原因 |
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