摘要
采用自制的腐蚀监测探头,利用交流阻抗技术监测了碳钢在我国青岛海洋大气中的腐蚀行为,腐蚀监测探头是由环氧树脂密封的两个相同大小的长方形碳钢片组成,监测了腐蚀探头溶液电阻(Rs)、极化电阻(Rp)等参数,利用Stern-Geary公式由Rp计算了钢材的腐蚀速度,研究了腐蚀速度与温度、相对湿度的关系。结果表明:温度和相对湿度是影响钢材大气腐蚀的重要因素之一;相对湿度越大,碳钢的腐蚀速度越大;当相对湿度低于碳钢的临界相对湿度时,温度对腐蚀速度几乎没有影响,如果高于其临界相对湿度时,温度升高,腐蚀速度加快;从监测的Rp值变化情况可以看出大气腐蚀是一个非常复杂和不稳定的过程。
In this paper the corrosion results of corrosion monitoring of carbon steel mosphere in an islet of Qingdao monitered by means of AC impedance technique are presented. The corrosion sensor used for corrosion monitoring consisted of two parallel steel sheets embedded in epoxy resin. Corrosion rates of the carbon steel have been evaluated from Rp using Stern-Geary equation. A correlation of Rp with temperature and relative humidity （RH） has been discussed. The results indicated that the higher relative humidity was, the faster corrosion rate was of the steel. When the RH was below a critical relative humidity, the effect of temperature is ignorable, on the contrary, the effect of temperature is very remarkable. Furthermore, it can seen that the atmospheric corrosion is an unsteady and complicated process from Rp.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2007年第4期243-246,共4页
Corrosion Science and Protection Technology
关键词
大气腐蚀
腐蚀监测探头
交流阻抗技术
温度
相对湿度
atmospheric corrosion
corrosion monitoring sensor
AC impedance technique
temperature
relative humidity
