表面技术2011，Vol.40Issue(1)：63-67,5.
硝酸重沸器的腐蚀失效分析和防护对策
Failure Analysis and Protection of Nitric Acid Multiple-boiler
王博 1李德超 1李庆华 1杨根柱 1熊金平 2陆正良3
作者信息
- 1. 中国石油化工股份有限公司,石家庄炼化分公司,石家庄,050032
- 2. 北京化工大学,碳纤维及功能高分子教育部重点实验室,北京,100029
- 3. 北京钢铁研究总院,北京,100081
- 折叠
摘要
Abstract
The corrosion of the nitric acid multiple-boiler made of 304L SS was studied by optical microscope,SEM and other surface technique. The experimental results show that the non-sensitive intergranular corrosion takes place on the 304L SS of the nitric acid multiple-boiler at 89℃,55％ nitric acid. The corrosive medium diffuses towards both the steel inner along grain boundary and both side of grain boundary. The P content in grain boundary is higher 2 order of magnitude than that in grain, which induces the potential difference between the grain and grain boundary in corrosive medium, and resultes in the corrosion on the non-sensitive steel.关键词
重沸器/304L 不锈钢/腐蚀/失效分析Key words
multiple-boiler/ 304L SS/ corrosion/ failure analysis分类
矿业与冶金引用本文复制引用
王博,李德超,李庆华,杨根柱,熊金平,陆正良..硝酸重沸器的腐蚀失效分析和防护对策[J].表面技术,2011,40(1):63-67,5.
