碳钢大气腐蚀时表面结露行为的某些影响因素  

SOME FACTORS AFFECTING DEWING BEHAVIOR ON MILD STEEL SURFACE DURING ATMOSPHERIC CORROSION

作　　者：徐乃欣[1] 赵灵源[1] 丁翠红[1] 张承典[1] 李润身[1] 钟庆东[1] 

机构地区：[1]中国科学院上海冶金研究所,上海200050

出　　处：《腐蚀与防护》2001年第12期522-526,共5页Corrosion & Protection

基　　金：国家自然科学基金项目 (5 98710 5 8)

摘　　要：利用作者建立的能直接观察和记录金属表面结露过程的实验室装置 ,进一步考察了表面划痕、各种尘埃、盐玷污等多种因素对于碳钢表面上结露行为的影响 。By means of a special experimental device, which mainly consisted of a semiconductor cooling unit to cool the plate specimen and could simulate dew formation at early stage of atmospheric corrosion, several influencing factors were examined. Dewing took place preferentially along the scratch on specimen surface. Generally, the presence of dust on metal surface facilitated dew formation and hence accelerated corrosion. However, the solid deposits from various sources behaved quite differently. Dry dirt sucked moisture due to its hydroscopicity, while sand granules did not show significant effect on dewing. On the salt contaminated surface dewing was much easier and corrosion was accelerated.

关 键 词：大气腐蚀 表面结露行为 

分 类 号：TG172.3[金属学及工艺—金属表面处理] TG178[金属学及工艺—金属学]