货油舱上甲板用耐蚀钢的腐蚀行为  

Corrosion Behavior of Corrosion Resistant Steel for Upper Deck in Cargo Oil Tank

作　　者：侯元盛 左景辉[2] 刘忱 刘常升[1] HOU Yuansheng;ZUO Jinghui;LIU Chen;LIU Changsheng(Key Laboratory for Anisotropy and Texture of Materials,Ministry of Education,Northeastern University,Shenyang 110819,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,沈阳110819 [2]中国科学院金属研究所,沈阳110016

出　　处：《腐蚀与防护》2022年第2期43-47,52,共6页Corrosion & Protection

基　　金：辽宁省科技重大专项(2019JH1/10100025)。

摘　　要：采用失重法、XRD、SEM/EDS等方法研究了一种应用于超大型油轮的新型耐蚀钢在模拟货油舱上甲板腐蚀环境中的腐蚀行为。结果表明:货油舱上甲板用耐蚀钢发生的是O_(2)-CO_(2)-H_(2)S-SO_(2)-N_(2)混合气体下的均匀腐蚀,新型耐蚀钢在试验后期的腐蚀速率约为0.20 mm/a。腐蚀产物主要成分是α-FeOOH、FeS_(2)和FeSO_(4)·H_(2)O,其中稳定物相α-FeOOH含量最大,微观下球状α-FeOOH不断生成且逐渐密集呈团球簇;试验后期,耐蚀钢表面的锈层相对致密均匀、无分层,且裂纹、破损等缺陷较少。The corrosion behavior of a new type of corrosion-resistant steel applied to a super-large oil tanker in the corrosive environment of the upper deck of a simulated cargo oil tank was studied by methods such as weightlessness method,XRD,SEM/EDS,etc.The results showed that the corrosion-resistant steel used for upper deck in the cargo oil tank was uniformly corroded in O_(2)-CO_(2)-H_(2)S-SO_(2)-N_(2) mixed gas.The corrosion rate of the new type of corrosion-resistant steel in the later stage of the test was about 0.20 mm/a.The main components of corrosion products wereα-FeOOH,FeS_(2),FeSO_(4)·H_(2)O.Among them,the stable phaseα-FeOOH had the largest content,and the sphericalα-FeOOH was continuously generated and gradually densely formed into clusters at the micro level.In the later stage of the test,the rust layer on the surface of the corrosion-resistant steel was relatively dense and uniform without delamination,and there were fewer defects such as cracks and breakages.

关 键 词：货油舱上甲板 耐蚀钢 腐蚀行为 

分 类 号：TG174[金属学及工艺—金属表面处理]