武会宾,王迪,梁金明,张鹏程,刘晓童,岳远杰

• 1:北京科技大学冶金工程研究院

摘要(Abstract)：

为了探究低合金钢中夹杂物在低pH值,高浓度氯离子腐蚀环境下诱发点蚀的作用机理,利用pH为0.85的10%NaCl溶液,模拟货油舱下底板腐蚀环境,采用扫描电镜(SEM)、X射线能量色散谱(EDS)、夹杂物原位观察等手段,分析了不同类型、尺寸、形状的夹杂物对E36级船板钢点蚀行为的影响。结果表明:试验钢中存在MnS、TiO2等不同类型的夹杂,夹杂物在酸性溶液中最先被溶解,是点蚀的诱发源。夹杂物周围存在直径10μm左右的阴极保护区,在早期不易被腐蚀。此外,不同类型和形状的夹杂物诱发点蚀的优先顺序不同,MnS较TiO2优先诱发点蚀,长宽比大的夹杂较圆形夹杂优先诱发点蚀。

关键词(KeyWords)： 货油舱;下底板;夹杂物;点蚀

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项资助项目(2011ZX05016-004);; “十二五”国家科技支撑计划资助项目(2011BAE25B00)

作者(Author): 武会宾,王迪,梁金明,张鹏程,刘晓童,岳远杰

DOI: 10.13289/j.issn.1009-6264.2014.12.031

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