工程科学学报2017，Vol.39Issue(6)：882-888,7.DOI:10.13374/j.issn2095-9389.2017.06.010
高温浓硫酸中氟离子掺入对不锈钢耐蚀性能的影响
Effects of fluoride ions on corrosion resistance of stainless steel in high-temperature concentrated sulfuric acid
摘要
Abstract
The effects of fluoride ions on the corrosion resistance of 304, 2507, and 904L stainless steels in high-temperature concentrated sulfuric acid were investigated by immersion and electrochemical tests as well as scanning electron microscopy ( SEM ) and energy-dispersive X-ray spectroscopy ( EDS) analyses. The results show that the corrosion resistances of these three stainless steels improve when fluoride ions are added in high-temperature concentrated sulfuric acid. Of the three, the corrosion resistance of 904L is more stable and reliable. The nickel sulfide formed in sulfuric acid, which is thermodynamically unstable, causes active-pas-sive transition. The corrosion resistance of stainless steel increases upon the addition of fluorine ions because the nickel and fluorine i-ons form a more stable compound to replace nickel sulfide.关键词
不锈钢/高温浓硫酸/电化学/氟离子/腐蚀Key words
stainless steel/high-temperature concentrated sulfuric acid/electrochemical/fluoride ion/corrosion分类
矿业与冶金引用本文复制引用
于明飞,向嵩,马国强,石维,余稳,冀宣名..高温浓硫酸中氟离子掺入对不锈钢耐蚀性能的影响[J].工程科学学报,2017,39(6):882-888,7.基金项目
国家自然科学基金资助项目(51661006,51361004,51574095) （51661006,51361004,51574095）
贵州省百层次创新型人才资助项目(20164014) （20164014）
贵州省科技计划资助项目(20142003) （20142003）
贵州省教育厅创新群体重大研究项目(2016021) （2016021）
