Effect of NaOH Concentration on the Corrosion Behavior of 16Mn Steel in the Process of Producing Alumina
In the process of alumina production from bauxite with high sulfur content by Bayer process, some factors such as NaOH concentration, S2- concentration and corrosion time have certain effects on the corrosion of equipment steel. The corrosion behavior of 16Mn steel under different NaOH co...
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| Language: | Chinese |
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Editorial Department of Materials Protection
2021-05-01
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| Series: | Cailiao Baohu |
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| Online Access: | http://www.mat-pro.com/fileup/1001-1560/PDF/20210531.pdf |
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| author | ZHOU Yuan, ZHOU Bin, ZOU Yong - qiang, PAN Xiao - hui, QUAN Bian - li |
| author_facet | ZHOU Yuan, ZHOU Bin, ZOU Yong - qiang, PAN Xiao - hui, QUAN Bian - li |
| author_sort | ZHOU Yuan, ZHOU Bin, ZOU Yong - qiang, PAN Xiao - hui, QUAN Bian - li |
| collection | DOAJ |
| description | In the process of alumina production from bauxite with high sulfur content by Bayer process, some factors such as NaOH concentration, S2- concentration and corrosion time have certain effects on the corrosion of equipment steel. The corrosion behavior of 16Mn steel under different NaOH concentrations was studied by electrochemical and weightless corrosion methods. The SEM was used to analyze the microscopic appearance of the corrosion products, the change rule of the composition of the corrosion products was analyzed according to the distribution of elements. Results showed that the corrosion rate of 16Mn steel increased with the increase of NaOH concentration, and decreased after reaching the maximum value. When the NaOH concentration was equal to 245 g/L, the corrosion rate was the maximum. The impedance arc radius began to decrease with the increase of NaOH concentration from 235 g/L to 245 g/L. The corrosion was mainly controlled by charge transfer, and the adsorption of S2- mainly occurred. When the NaOH concentration was equal to 255 g/L, the impedance spectrum showed a typical Warburg diffusion phenomenon. The corrosion process was mainly controlled by both ion diffusion and charge transfer, and the adsorption of OH- mainly occurred. |
| format | Article |
| id | doaj-art-bae6e4e647db40b1a3182e60b7d3d152 |
| institution | Matheson Library |
| issn | 1001-1560 |
| language | zho |
| publishDate | 2021-05-01 |
| publisher | Editorial Department of Materials Protection |
| record_format | Article |
| series | Cailiao Baohu |
| spelling | doaj-art-bae6e4e647db40b1a3182e60b7d3d1522025-07-11T06:54:23ZzhoEditorial Department of Materials ProtectionCailiao Baohu1001-15602021-05-0154517017510.16577/j.cnki.42-1215/tb.2021.05.031Effect of NaOH Concentration on the Corrosion Behavior of 16Mn Steel in the Process of Producing AluminaZHOU Yuan, ZHOU Bin, ZOU Yong - qiang, PAN Xiao - hui, QUAN Bian - li0(1. College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China;2. Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025, China)In the process of alumina production from bauxite with high sulfur content by Bayer process, some factors such as NaOH concentration, S2- concentration and corrosion time have certain effects on the corrosion of equipment steel. The corrosion behavior of 16Mn steel under different NaOH concentrations was studied by electrochemical and weightless corrosion methods. The SEM was used to analyze the microscopic appearance of the corrosion products, the change rule of the composition of the corrosion products was analyzed according to the distribution of elements. Results showed that the corrosion rate of 16Mn steel increased with the increase of NaOH concentration, and decreased after reaching the maximum value. When the NaOH concentration was equal to 245 g/L, the corrosion rate was the maximum. The impedance arc radius began to decrease with the increase of NaOH concentration from 235 g/L to 245 g/L. The corrosion was mainly controlled by charge transfer, and the adsorption of S2- mainly occurred. When the NaOH concentration was equal to 255 g/L, the impedance spectrum showed a typical Warburg diffusion phenomenon. The corrosion process was mainly controlled by both ion diffusion and charge transfer, and the adsorption of OH- mainly occurred.http://www.mat-pro.com/fileup/1001-1560/PDF/20210531.pdf16mn steel; naoh concentration; corrosion rate; electrochemistry analysis |
| spellingShingle | ZHOU Yuan, ZHOU Bin, ZOU Yong - qiang, PAN Xiao - hui, QUAN Bian - li Effect of NaOH Concentration on the Corrosion Behavior of 16Mn Steel in the Process of Producing Alumina Cailiao Baohu 16mn steel; naoh concentration; corrosion rate; electrochemistry analysis |
| title | Effect of NaOH Concentration on the Corrosion Behavior of 16Mn Steel in the Process of Producing Alumina |
| title_full | Effect of NaOH Concentration on the Corrosion Behavior of 16Mn Steel in the Process of Producing Alumina |
| title_fullStr | Effect of NaOH Concentration on the Corrosion Behavior of 16Mn Steel in the Process of Producing Alumina |
| title_full_unstemmed | Effect of NaOH Concentration on the Corrosion Behavior of 16Mn Steel in the Process of Producing Alumina |
| title_short | Effect of NaOH Concentration on the Corrosion Behavior of 16Mn Steel in the Process of Producing Alumina |
| title_sort | effect of naoh concentration on the corrosion behavior of 16mn steel in the process of producing alumina |
| topic | 16mn steel; naoh concentration; corrosion rate; electrochemistry analysis |
| url | http://www.mat-pro.com/fileup/1001-1560/PDF/20210531.pdf |
| work_keys_str_mv | AT zhouyuanzhoubinzouyongqiangpanxiaohuiquanbianli effectofnaohconcentrationonthecorrosionbehaviorof16mnsteelintheprocessofproducingalumina |