氯碱生产环境下金属阳极电解槽的腐蚀探讨与防护方法研究  

Discussion and investigation of corrosion and protection of metal anode electrolytic tank for chlor-alkali production

作　　者：曾凤春[1] 谢万如[1] 任旺[1] 郑兴文[1] 曾俊[1] 

机构地区：[1]四川理工学院化学与制药工程学院,四川自贡643033

出　　处：《无机盐工业》2015年第5期45-47,共3页Inorganic Chemicals Industry

基　　金：材料腐蚀与防腐四川省重点实验室开放基金项目(2011CL07)

摘　　要：金属阳极电解槽的腐蚀严重影响了氯碱生产整个装置的安危以及产品的收率与质量.实验模拟氯碱生产中电解槽所处的恶劣介质环境,运用腐蚀失重法,揭示了电解槽的腐蚀行为与影响因素.实验结果表明：在氯碱生产环境下,当电解槽温度为85 ～90℃、阴极液中氢氧化钠质量分数为8％～12％、阳极液pH＜4时,电解槽的腐蚀速率最低.在此基础上,制定出了可行的电解槽腐蚀防护措施.The corrosion of metal anode electrolytic tank seriously affects the safety of total equipment, and the yield and quality of chlor-alkali production.This study simulated the basic or acid condition of chlor-alkali production,and revealed the corrosion behavior of electrolytic tank and its influences by weight-loss method.The experimental results showed that in the chlor-alkali production environment, when the cell temperature was at 85-90 ℃, the catholyte NaOH mass fraction between 8%-12%, and the anode solution pH was below 4, the corrosion rate of the electrolytic tank was at the lowest.On this basis, a practicable method was put forward to protect electrolytic tank against corrosion.

关 键 词：氯碱 金属阳极电解槽 腐蚀 防护 

分 类 号：TQ114[化学工程—无机化工]