Sensor Development for Corrosion Monitoring of Stainless Steels in H2SO4 Solutions

被引：3

作者：

Hren, Miha ^{[1
]}

Kosec, Tadeja ^{[1
]}

Lindgren, Mari ^{[2
]}

Huttunen-Saarivirta, Elina ^{[3
]}

Legat, Andraz ^{[1
]}

机构：

[1] Slovenian Natl Bldg & Civil Engn Inst, Dimiceva 12, SI-1000 Ljubljana, Slovenia

[2] Metso Outotec Res Ctr, POB 69, FI-28101 Pori, Finland

[3] VTT Tech Res Ctr Finland Ltd, POB 1000, FI-02044 Espoo, Finland

来源：

SENSORS | 2021年 / 21卷 / 04期

关键词：

stainless steel; hydrometallurgical industry; sulfuric acid; electrical resistance sensor; corrosion;

D O I：

10.3390/s21041449

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Equipment made of different stainless steels is often used in the hydrometallurgical processing industry. In this study, an electrical resistance sensor was developed for monitoring corrosion in acidic solutions at high temperature. Two types of stainless steel were used as the electrode materials, namely grade 316L stainless steel (EN 1.4404) and grade 2507 duplex stainless steel (EN 1.4410). The materials and sensors were exposed to a 10% H2SO4 solution containing 5000 mg/L of NaCl at various temperatures. Results from the sensors were verified using electrochemical techniques and postexposure examination. Results showed that the microstructure played an important role in the interpretation of corrosion rates, highlighting the importance of using an appropriate stainless steel for the production of sensors. Electrochemical tests and postexposure examination both showed that the grade 2507 had a significantly lower corrosion rate compared to the grade 316L. Under industrial-process conditions, the results for the grade 2507 sensor were promising with respect to sensor durability and performance, despite the extremely harsh operating environment.

引用

页码：1 / 17

页数：17

共 31 条

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