栓钉-焊肉-梁板间电偶腐蚀敏感性研究  

STUDY OF GALVANIC CORROSION SENSITIVITY BETWEEN ANY COUPLE OF STUD,WELDMENT,OR BEAM

作　　者：路新瀛[1] 李阳[1] 李源晋 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《工业建筑》2015年第8期125-128,134,共5页Industrial Construction

基　　金：国家支撑计划项目(2011BAJ09B03)

摘　　要：利用电化学试验,研究了Q235B型钢梁、ML15型栓钉、电弧熔焊焊肉及以栓钉杆为参照而组成的不同电偶对在模拟雨水和不同氯离子含量的饱和Ca(OH)2溶液中的腐蚀特性。试验结果表明:电弧熔焊焊肉的腐蚀敏感性最高,其次是冷墩栓钉头,再次为栓钉杆和钢梁;在本试验模拟的试验溶液中,焊肉与栓钉或钢梁间均具有形成电偶腐蚀的热力学条件,且随溶液腐蚀性增强,电偶对的电偶电流也随之变大;电偶腐蚀一旦发生,则焊肉的电偶腐蚀速率要高于其自腐蚀速率至少一个数量级。The corrosion behavior of Q235 B steel beam,ML15 steel stud,and the weldment used in a steel-concrete composite element,as well as the galvanic couples referring to the stud body in a simulated rainwater and a saturated Ca（ OH）2solution with different amount of chlorions,was studied by electrochemical method. The results showed that the weldment was the weakest part to be destroyed in the stud-beam system,the stud head was the following one,the stud body and the beam were moderate. So the galvanic cells were easily to be established between the weldment and stud,or beam in the simulated solutions at the present work,and the galvanic current increases with the corrosion strength of the solutions. The galvanic corrosion rate of weldment was at least one order higher than that of the selfcorrosion when the galvanic cell was established.

关 键 词：组合结构 栓钉 腐蚀 

分 类 号：TU398.9[建筑科学—结构工程]