硫酸工业低温位热回收系统腐蚀与不锈钢应用综述

Corrosion of Facilities and Application of Stainless Steels Related with Heat Recovery System for Sulfuric Acid Production

分析了硫酸工业低温位热回收系统的腐蚀特点,以及硫酸浓度和温度对不锈钢腐蚀的影响.讨论了200℃以上高温浓硫酸的腐蚀行为.结合腐蚀指数、合金元素作用和等腐蚀图评述了低温位热回收系统选择与应用不锈钢和耐蚀合金的依据.

The corrosion troubles of facilities related with heat recovery system in sulfuric acid production industry were characterized in terms of the effect of temperature and concentration of sulfuric acids on the corrosion behavior of stainless steels and alloys, especially the corrosion performance of metallic materials in concentrated sulfuric acids at temperatures above 200 ℃. The article also presented the concept and the function of the so called ＂corrosion index＂, ＂effect of alloying elements＂ and ＂iso-corrosion rate diagram＂ of stainless steels in detail, which were then recommended to be the suitable reference for materials selection for the heat recovery system in sulfuric acid production.