论文部分内容阅读
研究了Q235钢在不同SO2浓度48h的初期腐蚀行为,分析了在不同条件下Q235钢的初期腐蚀行为,发现SO2浓度0.05%为一临界点,此时Q235钢的腐蚀深度达到最大,随后再提高SO2浓度,腐蚀深度随之降低.同时运用扫描电子显微镜(SEM/EDAX)、Fourior变换红外光谱(FTIR)和XRD对Q235钢的表面形貌和腐蚀产物进行了分析,发现当SO2浓度为0.5%时,出现了三种不同形貌的产物层,并且在产物中发现了SO32-,讨论了不同条件下锈层中S元素的作用,并对SO32-的生成机制进行了分析,阐述了Q235钢在不同SO2浓度下的腐蚀机理.
The initial corrosion behavior of Q235 steel at different SO2 concentrations for 48h was studied. The initial corrosion behavior of Q235 steel under different conditions was analyzed. It was found that the corrosion rate of Q235 steel reached the maximum at 0.05% SO2 concentration and then increased SO2 concentration and corrosion depth were decreased.The surface morphology and corrosion products of Q235 steel were analyzed by scanning electron microscopy (SEM / EDAX), Fourior transform infrared spectroscopy (FTIR) and XRD.The results showed that when SO2 concentration was 0.5% , Three product layers with different topography appeared and SO32- was found in the product. The effect of S element in the rust layer under different conditions was discussed. The formation mechanism of SO32- was also analyzed. The Q235 steel Corrosion mechanism at different SO2 concentrations.