高溫濃硫酸中氟離子摻入對不銹鋼耐蝕性能的影響

于明飛; 向嵩; 馬國強; 石維; 余穩; 冀宣名

doi:10.13374/j.issn2095-9389.2017.06.010

高溫濃硫酸中氟離子摻入對不銹鋼耐蝕性能的影響

doi: 10.13374/j.issn2095-9389.2017.06.010

于明飛¹,
向嵩^1,2,3, ,,
馬國強¹,
石維^1,2,3,
余穩¹,
冀宣名¹

1) 貴州大學材料與冶金學院, 貴陽 550025
2) 貴州大學貴州省材料結構與強度重點實驗室, 貴陽 550025
3) 貴州大學高性能金屬結構材料與制造技術國家地方聯合工程實驗室, 貴陽 550025

基金項目:

貴州省教育廳創新群體重大研究項目(2016021)

貴州省百層次創新型人才資助項目(20164014)

貴州省科技計劃資助項目(20142003)

國家自然科學基金資助項目(51661006，51361004，51574095)

詳細信息

中圖分類號: TG142.71
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- 文章訪問數: 958
- HTML全文瀏覽量: 381
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- 被引次數: 0
出版歷程
- 收稿日期: 2016-09-08

Effects of fluoride ions on corrosion resistance of stainless steel in high-temperature concentrated sulfuric acid

YU Ming-fei¹,
XIANG Song^{1,2,3
, ,},
MA Guo-qiang¹,
SHI Wei^1,2,3,
YU Wen¹,
JI Xuan-ming¹

1) College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China
2) Guizhou Key Laboratory for Mechanical Behavior and Micro-Structure of Materials, Guizhou University, Guiyang 550025, China
3) National with Local Engineering Laboratory for High Performance Metal Structure Materials and Manufacturing Techniques, Guizhou University, Guiyang 550025, China

摘要

摘要: 采用浸泡法和電化學測試方法結合掃描電鏡和能譜儀研究了高溫濃硫酸中氟離子的摻入對304、2507以及904L三種不銹鋼耐蝕性能的影響.結果表明:氟離子的摻入對三種不銹鋼在濃硫酸中的腐蝕具有抑制作用,綜合來看,904L具有更為穩定的耐蝕性能;三種不銹鋼在高溫濃硫酸中由于生成了熱力學不穩定的硫化鎳而產生了活化轉鈍化現象,而摻入氟離子會和硫離子發生競爭使其排擠出電極表面,氟離子與鎳離子結合形成另外一種更穩定的阻擋層使不銹鋼耐蝕性提高.
- 不銹鋼 /
- 高溫濃硫酸 /
- 電化學 /
- 氟離子 /
- 腐蝕
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-passive transition. The corrosion resistance of stainless steel increases upon the addition of fluorine ions because the nickel and fluorine ions form a more stable compound to replace nickel sulfide.
- stainless steel /
- high-temperature concentrated sulfuric acid /
- electrochemical /
- fluoride ion /
- corrosion

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參考文獻(9)

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