含H_2S干湿交替环境下船用耐蚀钢研究  

Corrosion Resistant Ship Hull Steel in Wet-Dry Environments Contained H_2S

作　　者：罗小兵[1] 柴锋[1] 苏航[1] 杨才福[1] 侯振伟 李超[3] 

机构地区：[1]钢铁研究总院工程用钢研究所,北京100081 [2]宿迁南钢金鑫轧钢有限公司,江苏宿迁223800 [3]钢铁研究总院青岛海洋腐蚀研究所,山东青岛266071

出　　处：《钢铁研究学报》2013年第8期51-57,共7页Journal of Iron and Steel Research

基　　金：国家科技支撑计划资助项目(2011BAE25B01)

摘　　要：按照IMO(国际海事组织)规定的《油轮货油舱用耐蚀钢性能标准》模拟了货油舱上甲板的腐蚀环境,研究了两种船用低合金钢的腐蚀行为。结果表明,在含H2S干湿交替环境下,船体钢腐蚀类型为均匀腐蚀,传统E36船板的腐蚀速率超过0.4mm/a;在钢中添加一定量的Cu、Ni,促进了锈层中稳定相α-FeOOH的形成,减少了锈层中裂纹等缺陷,锈层更加致密连续,提高了钢的耐蚀性;夹杂物改性处理在钢中获得5～10μm的球状CaO、CaS夹杂物,该夹杂物的溶解在基体表面生成碱性产物,提高了表面液膜的pH值,减缓了酸性环境下基体的腐蚀。The corrosion environment of cargo oil tank（COT） was simulated according to performance standard for corrosion resistant steel of IMO in this paper,to study the corrosion behavior of two different ship hull steel on the upper deck of COT.The results showed general corrosion in wet-dry environments contained H2S,the corrosion rate of conventional E36 steel reached 0.4 mm/a.The addition of Cu and Ni improved the formation of the stable phase α-FeOOH,which decreased the defect in the rust and made the rust more compact.Inclusions such as CaO and CaS formed in the Ca treated ship steel,which dissolved under the corrosion media and alkaline product generated,the alkaline product increased the pH value of the liquid film on the surface of steel and slowed down the corrosion rate of steel.

关 键 词：货油舱 H2S 干湿交替 钙处理 

分 类 号：U668.2[交通运输工程—船舶及航道工程] TG142.7[交通运输工程—船舶与海洋工程]