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在环丁砜中对AISI 1010碳钢进行金属表面映射的实时腐蚀监测

Real-Time Corrosion Monitoring of AISI 1010 Carbon Steel with Metal Surface Mapping in Sulfolane.

作者信息

Bak Andrzej, Losiewicz Bozena, Kozik Violetta, Kubisztal Julian, Dybal Paulina, Swietlicka Aleksandra, Barbusinski Krzysztof, Kus Slawomir, Howaniec Natalia, Jampilek Josef

机构信息

Institute of Chemistry, University of Silesia, Szkolna 9, 40-007 Katowice, Poland.

Institute of Materials Science, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland.

出版信息

Materials (Basel). 2019 Oct 8;12(19):3276. doi: 10.3390/ma12193276.

DOI:10.3390/ma12193276
PMID:31597375
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6803984/
Abstract

Solvents are widely used in organic synthesis. Sulfolane is a five-membered heterocyclic organosulfur sulfone (R-SO-R', where R/R' is alkyl, alkenyl, or aryl) and an anthropogenic medium commonly used as industrial extractive solvent in the liquid-liquid and liquid-vapor extraction processes. Under standard conditions sulfolane is not aggressive towards steel, but at higher temperatures and in oxygen, water, or chlorides presence, it can be decomposed into some corrosive (by-)products with generation of SO and subsequent formation of corrosive HSO. This pilot-case study provides data from laboratory measurements performed in low conductivity sulfolane-based fluids using an industrial multi-electrochemical technique for reliable detection of corrosion processes. In particular, a comprehensive evaluation of the aqueous phase impact on general and localized corrosion of AISI 1010 carbon steel in sulfolane is presented. Assessment of corrosive damage was carried out using an open circuit potential method, potentiodynamic polarization curves, SEM/EDS and scanning Kelvin probe technique. It was found that an increase in the water content (1-3 vol.%) in sulfolane causes a decrease in the corrosion resistance of AISI 1010 carbon steel on both uniform and pitting corrosion due to higher conductance of the sulfolane-based fluids.

摘要

溶剂在有机合成中被广泛使用。环丁砜是一种五元杂环有机砜(R-SO-R',其中R/R'为烷基、烯基或芳基),是一种人为介质,通常在液-液和液-气萃取过程中用作工业萃取溶剂。在标准条件下,环丁砜对钢没有腐蚀性,但在较高温度以及有氧气、水或氯化物存在的情况下,它会分解成一些腐蚀性(副)产物,生成SO并随后形成腐蚀性的HSO。本案例研究提供了在低电导率的环丁砜基流体中使用工业多电化学技术进行实验室测量的数据,以可靠地检测腐蚀过程。特别是,本文对水相对环丁砜中AISI 1010碳钢的全面腐蚀和局部腐蚀的影响进行了评估。使用开路电位法、动电位极化曲线、扫描电子显微镜/能谱仪和扫描开尔文探针技术对腐蚀损伤进行了评估。研究发现,由于环丁砜基流体的电导率较高,环丁砜中水含量(1-3体积%)的增加会导致AISI 1010碳钢在均匀腐蚀和点蚀方面的耐腐蚀性降低。

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