两类船用低合金钢耐点蚀性能的比较  

COMPARISON OF PITTING RESISTANCE OF TWO KINDS OF LOW ALLOY HULL STEELS

作　　者：王建民[1] 陈学群[2] 李国民[2] 常万顺[2] 

机构地区：[1]海军工程大学船舶与海洋工程系,武汉430033 [2]海军工程大学理学院,武汉430033

出　　处：《中国腐蚀与防护学报》2005年第6期356-360,共5页Journal of Chinese Society For Corrosion and Protection

摘　　要：通过模拟闭塞腐蚀电池试验及室内间浸挂片试验,对常用的Ni-Cr系和Mn系两类低合金船体结构钢的耐点蚀性能作了比较.短期挂片的结果表明,Ni-Cr系钢的耐点蚀性能优于Mn系钢;而模拟长期挂片条件的闭塞电池试验结果则表明,Ni-Cr系钢的耐点蚀性能比Mn系钢差.在涂层保护下,Ni-Cr系钢的点蚀诱发孕育时间比Mn系钢长很多.表现为实船使用中Ni-Cr钢的耐蚀性一直优于Mn系钢.The pit corrosion resistances of nickel - chromium series and manganese series low alloy structural hull steels were compared by simulating occluded corrosion cell tests and interval laboratory immersion corrosion tests. The short - term immersion corrosion results showed that in early pit propagation stage, the rates of pitting propagation of nickel - chromium steels were slower than those of manganese steels. However, the results of the simulating occluded corrosion cell tests showed that the pitting resistance of nickel - chromium steels were lower than that of manganese steels when simulating long - term immersion corrosion test. However, pitting initiation stage of nickel - chromium steels with coating is much longer than that of manganese steels with coating. Therefore the resistance of nickel-chromium steels is bigger than that of maganese steels in practical use.

关 键 词：低合金钢 闭塞腐蚀电池 点蚀 

分 类 号：TG172.5[金属学及工艺—金属表面处理]