某电力推进船舶轴系腐蚀断裂机理分析  

Analysis of Corrosion and Fracture Mechanism of a Certain Electric Propulsion Ship Shafting

作　　者：张俊武 易小冬[1] 徐逸然 王国亮 ZHANG Junwu;YI Xiaodong;XU Yiran;WANG Guoliang(Shanghai Marine Equipment Research Institute,Shanghai 200031,China)

机构地区：[1]上海船舶设备研究所,上海200031

出　　处：《船舶工程》2024年第3期73-80,共8页Ship Engineering

摘　　要：为了研究电力推进调查船螺旋桨轴腐蚀断裂的原因,通过低倍试验、化学成分分析、硬度测试、样件力学性能试验等方式验证了取样产品的制造质量,通过腐蚀案例样件的形貌分析发现样件腐蚀具有典型的局部腐蚀特点,并发现样件腐蚀断面存在垢质,通过进一步X射线衍射分析获得垢质主要组成成分,并通过能谱分析检测到垢质中含有腐蚀性元素,检测后将螺旋桨轴腐蚀原因归因为垢下腐蚀。通过不锈钢腐蚀过程分析,讨论加速不锈钢局部腐蚀的多种因素,并对电力推进船舶常见的轴电流加速腐蚀的现象进行讨论,认为杂散电流是电力推进船舶各类腐蚀的重要风险,但存在难以捕捉和测量的困难,需要开展进一步研究。In order to study the reason of corrosion and fracture of the propeller shaft of a certain type of electric propulsion investigation ship,the manufacturing quality of sampled products is verified through low magnification tests,chemical composition analysis,hardness tests,and mechanical performance tests of samples.Through morphology analysis of corrosion case samples,it is found that the corosion of the samples has typical local corrosion characteristics,and it is found that there is scale in the corrosion section of the samples.The main components of the scale are obtained through further X-ray diffraction analysis,and corrosive elements are detected in the scale through energy spectrum analysis.The corrosion of the propeller shaft is atributed to corrosion under scale.Through the analysis of stainless steel corrosion process,various factors accelerating local corrosion of stainless steel are discussed.The common phenomenon of shaft current accelerated corrosion in electric propulsion ships is discussed,and it is pointed out that stray current is an important risk for various types of corrosion in electric propulsion ships.However,there are difficulties in capturing and measuring,and further research is needed.

关 键 词：电力推进 船舶轴系 轴电流 杂散电流 腐蚀断裂 

分 类 号：U664.3[交通运输工程—船舶及航道工程]