摘要
研究了涂有Ｎａ２ＳＯ４盐膜的Ｆｅ－１０Ｃｒ合金在７００℃，Ｏ２－０．５％（ＳＯ２＋ＳＯ３）气氛中的热腐蚀行为。结果表明，该合金在实验条件下发生了“低温”热腐蚀。腐蚀产物分两层，即在熔盐中沉积出的疏松氧化物层和在合金表面直接成长的相对致密的氧化物层。腐蚀形貌观察说明，热腐蚀的发展主要伴随着致密氧化层的增厚。腐蚀动力学和腐蚀形貌特点支持热腐蚀的电化学机理模型。
In order to have a general knowledge of'low temperature'hot corrosion behavior of ferretic heat-resistant steels containing about 10% Cr. the corrosion of Fe-10Cr alloy in the presence of a thin film of Na2SO4deposits in O2-0.5%(SO2+SO3) gas atmosphere at 700℃ was studied. The results showed that the alloy was subject to 'low temperature' hot corrosioll attack under the experimental condition. The corrosion product scale was found to consist of a salt-containing. porous oxide layer and a comparatively compact oxide layer. For the corrosion process. especially in the steady state. foe development of hot corrosion was characterized by the rapid growth of the compact oxide layer. The corrosion kinetics and morphology examinations tend to support the electrochemical model previously proposed for hot corrosion mechanisms.
出处
《腐蚀科学与防护技术》
CAS
CSCD
1994年第3期209-216,共8页
Corrosion Science and Protection Technology
基金
国家自然科学基金
中国科学院腐蚀科学开放研究实验室资助
