磷酸脲料浆浓缩过程中不锈钢抗腐蚀性能研究  

Corrosion Resistance of Different Stainless Steel Materials during Urea Phosphate Slurry Concentration Process

作　　者：伍堃[1] 张林锋[1] 

机构地区：[1]武汉工程大学邮电与信息工程学院,湖北武汉430073

出　　处：《广州化工》2017年第12期59-61,共3页GuangZhou Chemical Industry

摘　　要：分别以湿法净化磷酸和热法磷酸为原料模拟磷酸脲料浆浓缩条件,考察了工业中常采用的316、304、321等三种不锈钢材质挂片在其浓缩过程中的抗腐蚀性能。研究结果表明:不同磷酸为原料与尿素反应生成的磷酸脲溶液料浆在85℃搅拌浓缩过程中三种材质不锈钢的耐腐蚀性能力依次为316>304>321,且由于湿法磷净化酸中主要的杂质离子如Cl-、F-相对较高,导致不锈钢在以湿法磷酸为原料合成的磷酸脲料浆中浓缩过程中腐蚀速率远大于其在以热法磷酸为原料合成磷酸脲溶液料浆的浓缩过程中的腐蚀速率。The simulated urea phosphate slurry was obtained from the phosphoric acid by the wet and thermal process as raw materials. Then the corrosion resistance of 316,304 and 321 stainless steel coupons in the concentration process of urea phosphate slurry was investigated. The results showed that the corrosion resistance of three patterns of stainless steels was 316〉304〉321 during the concentration process of urea phosphate slurry with stirring at 85℃. Because the main impurity ions such as Cl- and F-were relatively high, the corrosion rate of the three patterns stainless steels in the slurry with the phosphoric acid through the wet process was much higher than the slurry obtained by the thermal phosphoric acid as raw material.

关 键 词：磷酸脲 料浆浓缩 不锈钢 抗腐蚀性 

分 类 号：O302[理学—力学] TK11[动力工程及工程热物理—热能工程]