摘要
采用热喷涂Zn金属涂层、涂覆环氧树脂涂层和电沉积Zn/钝化等表面处理方式,对混凝土内置钢筋进行处理,通过电化学交流阻抗谱技术(EIS),探讨处理后的钢筋在混凝土中的腐蚀行为,并与未经防护的钢筋进行了比较。结果发现,在混凝土包覆的条件下,三种涂(镀)层对抑制混凝土内置钢筋的腐蚀均具有明显作用;相比之下,环氧涂层(保证涂层不遭受机械损伤或焊接破坏)抑制钢筋腐蚀的效果更好。
Surface treatments of thermal spraying Zn metal coatings, epoxy resin coating, and electrodeposited Zn/ passivation were applied on built-in rebar in reinforced concrete. Electrochemical impedance spectroscopy （EIS） was applied to explore the corrosion behavior of the rebar and compare with steel without protection. The results showed that in the concrete-clad condition, the three kinds of coating （plating） layer have significant effect for preventing general corrosion of the rebar; in contrast, epoxy coatings （guarantee coating against mechanical damage or weld damaged） has better corrosion inhibition effect.
出处
《装备环境工程》
CAS
2012年第4期19-22,63,共5页
Equipment Environmental Engineering
关键词
混凝土
钢筋腐蚀
表面处理
交流阻抗
concrete
corrosion of rebar
surface treatment
A. C. impedance spectrum
