【摘要】 在温度为298K,相对湿度为(85±5)%的条件下,对硫酸铵颗粒沉积后的A3钢的大气腐蚀行为进行了研究.腐蚀动力学曲线表明,沉积硫酸铵颗粒的A3钢试样比其空白试样的腐蚀更为严重.用IR、SEM/EDAX以及XPS分析研究了不同周期试样的结构和形貌,发现腐蚀主要沿着硫酸铵颗粒沉积的地方进行,随着腐蚀时间的延长,逐渐生成碱式硫酸铁盐,这些腐蚀产物减缓了A3钢腐蚀的速度.对硫酸铵颗粒沉积条件下A3钢的腐蚀机理进行了讨论.更多还原

【Abstract】 The atmospheric corrosion of A3 steel with deposited (NH4)2SO4 particles has been investigated at 298 K and relative humidity of (85±5)%.Corrosion kinetics curves show that A3 steel with deposited (NH4)2SO4 particles corroded more seriously than that without (NH4)2SO4 particles.IR,SEM/EDAX and XPS were utilized to study the development and characterization of corrosion products.The results indicate that A3 steels with (NH4)2SO4 particles corroded much faster than that without (NH4)2SO4 particles,and the corrosion of A3 steel initiated along the deposition area of (NH4)2SO4 particles,and formed basic iron sulfate.A corrosion mechanism was proposed to explain the observation.更多还原