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Corrosion inhibition of organic amine on Q235 steel in ammonium sulfate slurry of ammonia flue gas desulfurization system

Zhouyang Lian (School of Environmental Sciences and Engineering, Nanjing Tech University, Nanjing, China)
Zhengwei Luo (School of Environmental Sciences and Engineering, Nanjing Tech University, Nanjing, China)
Lirui Yuan (School of Environmental Sciences and Engineering, Nanjing Tech University, Nanjing, China)
Mulin Guo (School of Environmental Sciences and Engineering, Nanjing Tech University, Nanjing, China)
Wuji Wei (School of Environmental Sciences and Engineering, Nanjing Tech University, Nanjing, China)
Kuo Liu (School of Environmental Sciences and Engineering, Nanjing Tech University, Nanjing, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Publication date: 5 June 2017

Abstract

Purpose

This paper aims to evaluate diethylenetriamine (DETA) as an inhibitor on Q235 (Gr. D) steel in ammonia flue gas desulfurization (AFGD) system.

Design/methodology/approach

This research was carried out by weight loss, electrochemical measurements, scanning electron microscopy and X-ray photoelectron spectrometry. The effects of DETA on crystallization of ammonium sulfate and its co-crystallization were also investigated by X-ray diffraction and infrared spectroscopy.

Findings

The inhibition efficiency of DETA reached a maximum value of 98.96 per cent. DETA is postulated to adsorb on Q235 steel surface, resulting in the formation of a protective film by the accumulation of many flat particles, and the thickness of protective film is 8 μm. DETA had no effect on the crystallization of ammonium sulfate product.

Originality/value

DETA can be used in AFGD system as an inhibitor to protect the equipment well.

Keywords

Acknowledgements

This work was carried out in the frame of research project funded by Open Project of Jiangsu Key Laboratory of Industrial Water-Conservation and Emission Reduction and National Natural Science Foundation of China (Grant No. 21676144).

Citation

Lian, Z., Luo, Z., Yuan, L., Guo, M., Wei, W. and Liu, K. (2017), "Corrosion inhibition of organic amine on Q235 steel in ammonium sulfate slurry of ammonia flue gas desulfurization system", Anti-Corrosion Methods and Materials, Vol. 64 No. 4, pp. 432-442. https://doi.org/10.1108/ACMM-03-2015-1522

Publisher

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Emerald Publishing Limited

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