K_2SO_4-Na_2SO_4引起的工业纯铁的低温热腐蚀  

K_2SO_4-Na_2SO_4 INDUCED LOW TEMPERATURE HOT CORROSION OF COMMERCIAL PURE IRON

作　　者：张允书 李选明[1] 石声泰[1] 

机构地区：[1]中国科学院上海冶金研究所

出　　处：《中国腐蚀与防护学报》1990年第1期1-8,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：国家基金委;中国科学院腐蚀科学开放研究实验室的资助

摘　　要：研究了涂有 K_2SO_4～Na_2SO_4 盐膜的工业纯铁在 O_2～0.1、0.5和1.0%(SO_2+SO_3)气氛中于560～750℃温度范围内的低温热腐蚀行为。结果表明,工业纯铁的低温热腐蚀是由低熔点的 K-Na-Fe 三元复合硫酸盐引起的,并依铁的溶解-铁的氧化物的沉积机制发展。Low temperature hot corrosion behavior of commercial pure iron coated with K_2 SO_4-Na_2 SO_4 was studied in O_2-0.1,0.5 and 1.0%(SO_2+ SO_3)gas environments in the temperature range of 560 to 750℃.The experimental results indicate that the low temperature hot corrosion of iron is caused by the formation of low melting ternary sulfate containing K,Na and Fe,and that the corrosion can be explained on the basis of dissolution-precipitation mechanism.

关 键 词：铁 低温热腐蚀 三元硫酸盐 

分 类 号：TG172.63[金属学及工艺—金属表面处理]