苑京久,陈朝轶,李军旗,权变利,付慧,盖家萱.铝酸钠溶液中S2O32–浓度对12Cr1MoV钢腐蚀行为的影响[J].表面技术,2021,50(3):301-307.
YUAN Jing-jiu,CHEN Chao-yi,LI Jun-qi,QUAN Bian-li,FU Hui,GAI Jian-xuan.Effect of S2O32‒ Concentration in Sodium Aluminate Solution on Corrosion Behavior of 12Cr1MoV Steel[J].Surface Technology,2021,50(3):301-307 |
| 铝酸钠溶液中S2O32–浓度对12Cr1MoV钢腐蚀行为的影响 |
| Effect of S2O32‒ Concentration in Sodium Aluminate Solution on Corrosion Behavior of 12Cr1MoV Steel |
| 投稿时间：2020-06-01 修订日期：2020-07-08 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.03.032 |
| 中文关键词: 铝酸钠溶液 12Cr1MoV钢 腐蚀行为 S2O32‒ |
| 英文关键词:sodium aluminate solution 12Cr1MoV steel corrosion behavior S2O32‒ |
| 基金项目:国家自然科学基金(U1812402，51664005，51774102，52074096);黔科合平台人才计划([2017])5626，[2017]5778);贵州省教育厅项目(黔教合KY[2015]334，黔教合YJSCXJH[2019]002) |
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| Author | Institution |
| YUAN Jing-jiu | College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China;Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou Province, Guiyang 550025, China |
| CHEN Chao-yi | College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China;Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou Province, Guiyang 550025, China |
| LI Jun-qi | College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China;Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou Province, Guiyang 550025, China |
| QUAN Bian-li | College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China;Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou Province, Guiyang 550025, China |
| FU Hui | College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China;Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou Province, Guiyang 550025, China |
| GAI Jian-xuan | College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China;Key Laboratory of Metallurgical Engineering and Process Energy Saving of Guizhou Province, Guiyang 550025, China |
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| 中文摘要: |
| 目的 通过模拟氧化铝生产过程中的母液蒸发条件，研究在含S2O32‒的铝酸钠溶液中12Cr1MoV钢的腐蚀行为，探讨S2O32‒浓度对腐蚀的影响。方法 在高压反应釜中对12Cr1MoV钢进行浸泡腐蚀，考察钢的腐蚀速率、腐蚀产物形貌、元素分布及物相组成。结合交流阻抗和极化曲线测试，分析S2O32‒浓度对12Cr1MoV钢的腐蚀影响。结果 12Cr1MoV钢的腐蚀速率随着铝酸钠溶液中S2O32‒质量浓度的增加而加快，质量浓度由1 g/L增加至5 g/L时，腐蚀速率由0.78 g/(m2.d)增加至1.67 g/(m2.d)。腐蚀产物主要由Fe、O及少量的Al和S元素组成。当S2O32‒的质量浓度小于4 g/L时，腐蚀产物主要为Fe2O3、FeO和Fe(1‒x)AlxOOH(x≤0.19);当S2O32‒的质量浓度大于4 g/L时，产物主要为Fe3O4及少量的Al2O3。Rf和Rct随S2O32‒浓度的升高而先增大后降低，4 g/L时达到最大值，分别为1284 Ω.cm2和816 Ω.cm2;5 g/L时，Rf和Rct分别降到963 Ω.cm2和434 Ω.cm2。腐蚀电流密度随S2O32‒浓度的升高而逐渐增大，由1 g/L增加到5 g/L时，腐蚀电流密度由25.25 µA/cm2增加至238.28 µA/cm2并达到最大。极化曲线测量与高温浸泡获得的腐蚀速率规律一致。结论 铝酸钠溶液中S2O32‒浓度对12Cr1MoV钢的腐蚀速率产生重要影响，浓度的增大会加快钢的腐蚀速率。S2O32‒的质量浓度为4 g/L时，钢表面生成的Fe3O4层对钢基体的保护作用最好。S2O32‒浓度越大，12Cr1MoV钢的腐蚀电流密度越大。 |
| 英文摘要: |
| The purpose of the research is to study the corrosion behavior of 12Cr1MoV steel in sodium aluminate solution containing S2O32‒ and explore the effect of S2O32‒ on corrosion behavior under simulated evaporation conditions of mother liquor in producing alumina oxide. By carrying out the immersion corrosion to the 12Cr1MoV steel in the high-pressure reaction kettle, the corrosion rate of the steel, the morphology of the corrosion products, distribution of elements, and phase composition are obtained. In order to study the effect of S2O32‒ concentration on the corrosion behavior of 12Cr1MoV steel, a polarization curve and AC impedance test are used. The increased in S2O32‒ concentration has accelerated the corrosion rate of 12Cr1MoV steel gradually. The concentration increases from 1 g/L to 5 g/L, and the corrosion rate increases from 0.78 g/(m2.d) to 1.67 g/(m2.d). Corrosion products are mainly composed of Fe and O elements and a small amount of Al and S elements. When the concentration is less than 4 g/L, Fe2O3, FeO and Fe(1‒x)AlxOOH (x≤0.19) are the main corrosion products; and when the concentration is more than 4 g/L, Fe3O4 and a small amount of Al2O3 are found. With the increasing concentration of S2O32‒,.Rf and Rct increase first and then decrease, and reaches the maximum value at 4 g/L, which are 1284 Ω.cm2 and 816 Ω.cm2, respectively. At 5 g/L, Rf and Rct drop to 963 Ω.cm2 and 434 Ω.cm2, respectively. When the concentration of S2O32‒ increases from 1 g/L to 5 g/L, the corrosion current density increases from 25.25 µA/cm2 to 238.28 µA/cm2 (maximum). The corrosion rate law obtained from the polarization curve test is consistent with the high temperature immersion law. The concentration of S2O32‒ in sodium aluminate solution has a profound effect on the corrosion rate of 12Cr1MoV steel. Increasing the concentration of S2O32‒ in the solution can accelerate the corrosion rate of 12Cr1MoV steel. When it is greater than 4 g/L, the Fe3O4 layer formed on the12Cr1MoV steel surface protects the steel. Increasing the concentration will increase the Jcorr of 12Cr1MoV steel. |
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