化工进展2018，Vol.37Issue(2)：452-458,7.DOI:10.16085/j.issn.1000-6613.2017-0913
气固相硫协同作用下水冷壁的高温腐蚀特性
Characteristic for high temperature corrosion of water wall tube under gas-solid phase sulfur
摘要
Abstract
The high temperature corrosion experiments of power plant boiler water wall tube materials (12Cr1MoVG and 15CrMoG)have been made using the test bed-high temperature tube furnace.Corrosion mass gain method was used to gain the corrosion kinetics curve under gas phase sulfur and gas-solid phase sulfur.Furthermore,the micromorphology and element contents of corrosion test block were analyzed by SEM and EDS.The results showed that the corrosion kinetics of 12Cr1MoVG and 15CrMoG can be described by the double logarithmic equation.The corrosivity of interaction conditions was much stronger than that of gaseous S.The corrosion resistance of 15CrMoG was superior than that of 12Cr1MoVG.It is revealed that the corrosion layer can be roughly divided into three layers,namely,stripping blade layer,transition layer and corrosion permeability layer.When exposed to the condition of gas phase sulfur,the corrosion layer is thick and compact.When exposed to the interaction conditions of gas phase sulfur and solid phase sulfur,the corrosion layer is thin,brittle and easy to spall.In addition,the concentration of sulfur is present in the corrosion layer,and the sulfur mass fraction in corrosion permeability layer is as high as 6.65%.The oxygen content increases from the surface of the metal substrate to the surface of the corrosion layer.关键词
高温腐蚀/水冷壁材料/气固相硫/元素迁移Key words
high temperature corrosion/water wall materials/gas-solid phase sulfur/element migration分类
能源科技引用本文复制引用
王健,黄亚继,邹磊,岳峻峰,徐力刚,杨钊,查健锐,夏文青..气固相硫协同作用下水冷壁的高温腐蚀特性[J].化工进展,2018,37(2):452-458,7.基金项目
国家自然科学基金项目(51676040). （51676040）
