某型船海水冷却系统蝶阀腐蚀机理分析及改进措施  

Corrosion Mechanism Analysis and Improvement Measures of theButterfly Valves in Seawater Cooling System of a Certain Vessel

作　　者：涂永彬 赵洁[1] 李胜 李洋 张伟程 TU Yong-bin;ZHAO Jie;LI Sheng;LI Yang;ZHANG Wei-cheng(Wuhan Technical College of Communications,Wuhan 430065,China;Design&Research Institute,Wuchang Shipbuilding Industry Group Co.Ltd.,Wuhan 430060,China;Wuhan Wuchuan Measurement&Test Co.Ltd.,Wuhan 430060,China)

机构地区：[1]武汉交通职业学院,武汉430065 [2]武昌船舶重工集团有限公司设计研究院,武汉430060 [3]武汉武船计量试验有限公司,武汉430060

出　　处：《船海工程》2024年第3期64-68,73,共6页Ship & Ocean Engineering

基　　金：湖北省自然科学基金(2022CFB331)。

摘　　要：为了确定某型船蝶阀严重腐蚀原因,对所在系统进行整体分析,总结归纳当前船舶海水冷却系统腐蚀机理及防腐措施。通过系统分析、宏观检查、化学成分检验、金相组织观察,以及扫描电镜观察,分析腐蚀原因,确定产生腐蚀的关键因素为该蝶阀阀盘在热处理过程中冷却速度控制不当,产生亚稳态组织,在海水冷却系统中发生脱成分腐蚀和氧化腐蚀。在后续船舶设计建造过程中,从管路及附件材质要求、海水设计流速、系统工艺设计、管子制造工艺,以及防海生物等方面,给出海水冷却系统防腐的改进措施和系统方案,实船应用效果良好。In response to the severe corrosion of the butterfly valve in the seawater cooling system of a certain vessel,the corrosion mechanism of the seawater cooling system was analyzed,and corresponding anti-corrosion measures were proposed.After visual inspection,chemical composition analysis,metallographic examination and electron microscopy,the corrosion reasons were gradually investigated,finding that the cooling rate of the butterfly valve disc is not properly controlled in the process of heat treatment,so as to form the metastable structure,and the corrosion of decomposition and oxidation occurs in the seawater cooling system are the key corrosion factors.In the subsequent process of ship design and construction,improvement measures and system solutions for anti-corrosion of seawater cooling systems were provided from the aspects of pipe and accessory material requirements,seawater design flow rate,system scheme,pipe manufacturing process,and marine growth prevention system.

关 键 词：海水冷却系统 蝶阀 腐蚀机理 防腐措施 脱铝腐蚀 

分 类 号：U664.5[交通运输工程—船舶及航道工程]