期刊论文

Zhu, Z.

中文

中国腐蚀与防护学报

1005-4537

2015

35

4

365-371

10.11902/1005.4537.2014.173

湖南省自然科学基金项目（09JJ6067）； 湖南省科技攻关项目（2010GK3171）资助；

本校为第一且通讯机构

研究了炉前材料20G成膜条件下在模拟加氧水(OT)工况和还原性全挥发处理(AVT(R))工况高温水溶液中的电化学行为。用SEM,EDS和XRD对腐蚀产物膜的表面形貌和成分进行表征。结果表明:在40~ 140 ℃范围内,20G在OT工况中的腐蚀电流密度随着温度的升高而增加,EIS低频区有Warburg阻抗,电极反应属于混合控制;在AVT(R)溶液中腐蚀电流随着温度的升高先增大后减小;EIS高频区的容抗弧半径随着温度的升高在120 ℃出现最小值。XRD分析表明,材料表面形成了微米级腐蚀产物膜层,其主要成分为Fe_3O_4。

Electrochemical corrosion behavior of steel 20G used in boiler-front system was studied by means of a series of electrochemical measurements in simulated high temperature waters, which reproduced the situation of chemical conversion film formation by both the oxygenated treatment (OT) and all volatile treatment (reduction) (AVT(R)). The surface of the test steel was characterized by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), and X-ray diffraction (XRD). The results show that, when the temperature is between 40 to ...