Initial corrosion behavior of pure zinc in simulated tropical marine atmosphereInitial corrosion behavior of pure zinc in simulated tropical marine atmosphere

The initial corrosion behavior of pure zinc in a simulated tropical marine atmosphere was investigated using gravimetric method,scanning electron microscope combined with energy dispersive spectroscopy(SEM-EDS),X-ray diffractometry(XRD),Fourier transform infrared spectrometry(FTIR)and electrochemical impedance spectroscopy(EIS).The kinetics of corrosion process is a decelerating process following the empirical equation D=At^n(n<1).The protectiveness of the corrosion product layer could be attributed to the formation of simonkolleite,Zn5(OH)8Cl2·H2O,which could inhibit the rate determining step,namely charge transfer step,of the electrochemical corrosion process.A model of the evolution process of the product layers formed on zinc was proposed.In addition,the regularity of the corrosion rate of zinc as a function of the NaCl deposition rate can be described by a power function.

废液焚烧炉耐火材料长周期使用探讨

废液焚烧炉焚烧POSM装置产生高污染碱性废液水和酸性废水,但焚烧炉耐火砖制约焚烧炉能否长周期运行的关键因素。因此,需要一种耐火砖在1 100 ℃以上的高温情况下既能耐受碱性废水的侵蚀又要耐受酸性废水的侵蚀,从而达到耐火砖能够长周期使用的目的。文章基于此进行探讨。