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Effects of Chloride Ions and Nitrate Ions on the Anodic Dissolution of Iron in Sulfuric Acid Solution

by 1,2,*, 3, 1,2 and 1,2
1
Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China
2
School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
3
Jiangsu Zhongneng Silicon Industry Technology Development Co., Ltd., Xuzhou 221116, China
*
Author to whom correspondence should be addressed.
Metals 2020, 10(9), 1118; https://doi.org/10.3390/met10091118
Received: 16 July 2020 / Revised: 7 August 2020 / Accepted: 11 August 2020 / Published: 20 August 2020
In this paper, the flow injection (FI) technique combined with a partially-closed electrode (PCE) was used to manipulate the physicochemical microenvironment at the electrode/electrolyte interface so as to study the effects of chloride ions (Cl ions) and nitrate ions (NO3 ions) on the anodic dissolution of the Fe/0.5 mol dm−3 H2SO4 system. The anodic dissolution is modified by injecting various composition-containing solutions into the vicinity of the PCE, and then, the electrodissolution processes are analyzed by comparing the j–t curves before and after the injections. At the initial stage of the passive region, it is found that NO3 ions promote the anodic dissolution of iron by creating more active sites on the surface of the electrode when CNO3/CCl = 1:1; however, they inhibit the anodic dissolution by making the film more compact for the strong oxidized characteristics of NO3 ions when CNO3/CCl = 10:1. View Full-Text
Keywords: flow injection; current oscillations; partially-closed electrode; pitting corrosion; chloride corrosion; nitrate corrosion flow injection; current oscillations; partially-closed electrode; pitting corrosion; chloride corrosion; nitrate corrosion
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MDPI and ACS Style

Zhu, Y.; Zhang, J.; Wang, C.; Li, L. Effects of Chloride Ions and Nitrate Ions on the Anodic Dissolution of Iron in Sulfuric Acid Solution. Metals 2020, 10, 1118. https://doi.org/10.3390/met10091118

AMA Style

Zhu Y, Zhang J, Wang C, Li L. Effects of Chloride Ions and Nitrate Ions on the Anodic Dissolution of Iron in Sulfuric Acid Solution. Metals. 2020; 10(9):1118. https://doi.org/10.3390/met10091118

Chicago/Turabian Style

Zhu, Yongyan, Jianli Zhang, Chao Wang, and Liang Li. 2020. "Effects of Chloride Ions and Nitrate Ions on the Anodic Dissolution of Iron in Sulfuric Acid Solution" Metals 10, no. 9: 1118. https://doi.org/10.3390/met10091118

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