论文部分内容阅读
采用热重法及SEM/EDX,XRD研究了2.25CrMo钢在500和 600℃下含氯还原性气氛中的腐蚀行为。结果表明,实验材料在两种温度下均发生了加速腐蚀,并且在外氧化膜/基体界面检测到了氯的存在。合金腐蚀动力学从500℃时的近似抛物线向600℃时的直线转变与氯化物在该温度下的蒸汽压有关.讨论了材料发生加速腐蚀的机制。
The corrosion behavior of 2.25CrMo steel in a reducing atmosphere containing chlorine at 500 and 600 ℃ was investigated by TG, SEM / EDX and XRD. The results show that the experimental material accelerated corrosion at both temperatures and the presence of chlorine was detected at the outer oxide film / matrix interface. The corrosion kinetics of the alloy is related to the straight-line change from the approximate parabola at 500 ℃ to the temperature at 600 ℃ and the vapor pressure of chloride at this temperature.The mechanism of accelerated corrosion of the material is discussed.