论文部分内容阅读
大气腐蚀通常是电化学性质的腐蚀,因此研制有效的电化学监测装置,监测各种大气腐蚀环境的相对腐蚀速率是相当有意义的。文中介绍了大气腐蚀监测电池的性能及专用电化学监测仪和工作方法。讨论了采用该装置所测得的北京大气环境的腐蚀速率与大气环境因素的关系。结果表明,监测电池的腐蚀电流是大气相对湿度、气温、空气成份等环境因素的相关函数,并得出北京大气环境的腐蚀速率与大气相对湿度的回归方程。用该法测得的周期浸润、盐雾、全浸等几种室内加速腐蚀试验方法的腐蚀电流-时间曲线,可直观地看出腐蚀条件对腐蚀速率的影响,并能比较它们的加速性。结果表明这种监测技术不仅可以揭示大气腐蚀的电化学现象及其反应速率,而且有可能建立腐蚀环境因素与腐蚀速率之间的定量关系,以及研究大气腐蚀与室内加速腐蚀之间的关系。
Atmospheric corrosion is usually electrochemical corrosion, so it is quite significant to develop effective electrochemical monitoring devices to monitor the relative corrosion rate of various atmospheric corrosion environments. The paper introduces the performance of atmospheric corrosion monitoring battery and special electrochemical monitor and working method. The relationship between the atmospheric corrosion rate and atmospheric environment factors measured by this device is discussed. The results show that the corrosion current of the cell is a correlation function of environmental factors such as atmospheric relative humidity, air temperature and air composition, and the regression equation of atmospheric corrosion rate and atmospheric relative humidity in Beijing is obtained. Corrosion current-time curves of several indoor accelerated corrosion test methods such as periodic infiltration, salt spray and full immersion measured by this method can directly see the influence of corrosion conditions on the corrosion rate and compare their acceleration. The results show that this monitoring technique can not only reveal the electrochemical phenomenon of atmospheric corrosion and its reaction rate, but also establish a quantitative relationship between environmental factors and corrosion rate, and study the relationship between atmospheric corrosion and accelerated indoor corrosion.