In order to study the corrosion mechanism of weather steel with high content of Ti in marine environment,the corrosion behavior of weathering steels with two different Ti contents was studied by cyclic alternate immersion accelerated corrosion equipment.After corrosion experiment,the corrosion depth loss was measured.Then,the macro-morphology and micro-morphology of the corrosion products were observed by digital camera and scanning electron microscopy(SEM).The electron backscatter diffraction(EBSD)was used to analyze the effects of high-and low-angle grain boundaries on the initial corrosion property.The results show that Ti element in steel can improve the corrosion resistance of marine environment under similar grain size condition.However,with the increase of Ti content,the proportion of small angle grain boundaries,∑3 grain boundaries and ∑7 grain boundaries decrease.Ti content in some certain range is conducive to better corrosion resistance of weathering steel.
关键词
耐候钢/小角度晶界/重位点阵
Key words
weathering steel/low angle grain boundary/coincidence site lattice
维普
万方数据