摘要
研究了3%NaCl溶液,3%NaCl-Ca(OH)2溶液及C30、C40、C50混凝土中锌基分布式牺牲阳极对钢筋阴极保护的有效性,其中混凝土分掺盐与不掺盐两种。结果表明:①在盐溶液及碱性盐溶液条件下,分布式牺牲阳极对钢筋有良好的保护作用;②钢筋在掺盐混凝土中的电位和阴极极化电位比不掺盐时更负;③当混凝土浸没于盐水或自来水且充分湿润,混凝土保护层厚度不超过20mm时,牺牲阳极对钢筋的阴极极化满足负向偏移100mV的要求。
The effectiveness of zinc-based sacrificial discrete anodes in several conditions is studied, which are including 3% sodium chloride solution, 3% sodium chloride alkaline solution and different concrete specimens.The concrete specimens were cast with and without chloride.Results show that ：（1）the sacrificial anodes give good protection for steel bars in solutions ;（2）the potentials of steel bar in concrete containing chloride are lower than that of in concrete without chloride at same conditions; （3）the polarization of steel bars meets the requirement of ＂-100 mV＂ specification when the concrete specimens are immersed in chloride solution or water with the concrete covers thickness are less than 20 mm.
出处
《混凝土》
CAS
CSCD
北大核心
2009年第4期8-13,共6页
Concrete
关键词
腐蚀
阴极保护
氯离子污染
分布式牺牲阳极
混凝土
corrosion
cathodic protection
chloride contamination
discrete anodes
concrete
