The calcium-magnesium-alumina-silicate (CMAS) corrosion resistance of directionally solidified Al2O3/Y3Al5O12 (YAG) eutectic ceramics prepared by the Czochralski technique was investigated at 1300–1500 °C. No corrosion traces were observed after 100 h of corrosion at 1300 °C. Under 1400 °C and 1500 °C after 50 h, the corrosion depth was increased to 306 and 316 μm, but the corrosion rate did not significantly improve. The corrosion resistance was attributed to the inhibition of CMAS penetration by the stable phase interface, the modulation of CMAS corrosion activity by the diffusion of elements, and forming a continuous and dense garnet layer.
{"title":"CMAS corrosion resistance and mechanism of directionally solidified Al2O3/YAG eutectic ceramics at high temperatures of 1300–1500 ℃","authors":"Xue Tan, Haijun Su, Yuan Liu, Jiatong Yao, Hongliang Gao, Hao Jiang, Minghui Yu, Xiang Li, Peixin Yang, Zhuo Zhang, Min Guo","doi":"10.1016/j.corsci.2025.112793","DOIUrl":"10.1016/j.corsci.2025.112793","url":null,"abstract":"<div><div>The calcium-magnesium-alumina-silicate (CMAS) corrosion resistance of directionally solidified Al<sub>2</sub>O<sub>3</sub>/Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> (YAG) eutectic ceramics prepared by the Czochralski technique was investigated at 1300–1500 °C. No corrosion traces were observed after 100 h of corrosion at 1300 °C. Under 1400 °C and 1500 °C after 50 h, the corrosion depth was increased to 306 and 316 μm, but the corrosion rate did not significantly improve. The corrosion resistance was attributed to the inhibition of CMAS penetration by the stable phase interface, the modulation of CMAS corrosion activity by the diffusion of elements, and forming a continuous and dense garnet layer.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"248 ","pages":"Article 112793"},"PeriodicalIF":7.4,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-14DOI: 10.1016/j.corsci.2025.112782
Peiyu Ma , Di Wang , Dake Xu , Derek R. Lovley
Faster microbial corrosion of ferrous metals with flavin amendments has led to the common perception that flavins function as an electron shuttle for extracellular metal-to-microbe electron transfer. Direct examination of this possibility revealed that electron transfer from Fe0 or X80 carbon steel to flavins or the humic acid analogue anthraquinone-2,6-disulfonate (AQDS) was orders of magnitude slower than proton reduction to H2. Stainless steel did not reduce shuttles. Electron shuttles could not serve as the electron donor for sulfate reduction. Riboflavin enhanced Desulfovibrio vulgaris growth on H2, suggesting that the primary impact of added flavins is acting as a nutrient.
{"title":"Evaluating the importance of flavin-based electron shuttling in corrosion","authors":"Peiyu Ma , Di Wang , Dake Xu , Derek R. Lovley","doi":"10.1016/j.corsci.2025.112782","DOIUrl":"10.1016/j.corsci.2025.112782","url":null,"abstract":"<div><div>Faster microbial corrosion of ferrous metals with flavin amendments has led to the common perception that flavins function as an electron shuttle for extracellular metal-to-microbe electron transfer. Direct examination of this possibility revealed that electron transfer from Fe<sup>0</sup> or X80 carbon steel to flavins or the humic acid analogue anthraquinone-2,6-disulfonate (AQDS) was orders of magnitude slower than proton reduction to H<sub>2</sub>. Stainless steel did not reduce shuttles. Electron shuttles could not serve as the electron donor for sulfate reduction. Riboflavin enhanced <em>Desulfovibrio vulgaris</em> growth on H<sub>2</sub>, suggesting that the primary impact of added flavins is acting as a nutrient.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"247 ","pages":"Article 112782"},"PeriodicalIF":7.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-14DOI: 10.1016/j.corsci.2025.112781
K.W. Kang, A.X. Li, B.R. Zhang, J.S. Zhang, M.K. Xu, D. Huang, S.K. Liu, Y.T. Jiang, G. Li
This study fabricated a series of CoCrFeNi2-based high entropy alloys with L12 precipitates, achieving synergistic improvements in mechanical properties and corrosion resistance. The increase in strength is primarily attributed to precipitation strengthening. Corrosion resistance is improved by the L12 precipitates, which enrich the FCC phase with chromium, thereby enhancing the concentration of Cr2O3 in the passive film. Furthermore, first-principles calculations reveal that the improved corrosion resistance is due to the high work function and the lower surface adsorption energy of L12 precipitates.
{"title":"Synergistic influence of L12 precipitates on the mechanical properties and corrosion resistance of CoCrFeNi2-based high entropy alloys","authors":"K.W. Kang, A.X. Li, B.R. Zhang, J.S. Zhang, M.K. Xu, D. Huang, S.K. Liu, Y.T. Jiang, G. Li","doi":"10.1016/j.corsci.2025.112781","DOIUrl":"10.1016/j.corsci.2025.112781","url":null,"abstract":"<div><div>This study fabricated a series of CoCrFeNi<sub>2</sub>-based high entropy alloys with L1<sub>2</sub> precipitates, achieving synergistic improvements in mechanical properties and corrosion resistance. The increase in strength is primarily attributed to precipitation strengthening. Corrosion resistance is improved by the L1<sub>2</sub> precipitates, which enrich the FCC phase with chromium, thereby enhancing the concentration of Cr<sub>2</sub>O<sub>3</sub> in the passive film. Furthermore, first-principles calculations reveal that the improved corrosion resistance is due to the high work function and the lower surface adsorption energy of L1<sub>2</sub> precipitates.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"247 ","pages":"Article 112781"},"PeriodicalIF":7.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-14DOI: 10.1016/j.corsci.2025.112783
Bin Wang , Yugui Li , Huaying Li , Guanghui Zhao , Yaohui Song , Hui Xu
This study investigated the impact of homogenization annealing temperature and time on the intergranular corrosion (IGC) behavior of super ferritic stainless steel (SFSS) S44660. The results revealed the high susceptibility of IGC in S44660 was due to an intergranular chromium-depleted zone resulting from the precipitation of M23C6 along grain boundaries. Furthermore, IGC resistance was restored after treatment under three homogenized annealing conditions: 750 °C for 5 min, 780 °C for 2 min, and 800 °C for 30 s. This restoration was attributed to intragranular chromium atoms diffusing into the chromium-depleted zone during homogenization annealing, compensating for chromium loss from carbide precipitation. It has been confirmed that the self-healing of IGC in S44660 occurs through the process of controlling chromium diffusion by homogenizing annealing.
{"title":"Influence of homogenized annealing on the intergranular corrosion behavior of super ferritic stainless steel S44660","authors":"Bin Wang , Yugui Li , Huaying Li , Guanghui Zhao , Yaohui Song , Hui Xu","doi":"10.1016/j.corsci.2025.112783","DOIUrl":"10.1016/j.corsci.2025.112783","url":null,"abstract":"<div><div>This study investigated the impact of homogenization annealing temperature and time on the intergranular corrosion (IGC) behavior of super ferritic stainless steel (SFSS) S44660. The results revealed the high susceptibility of IGC in S44660 was due to an intergranular chromium-depleted zone resulting from the precipitation of M<sub>23</sub>C<sub>6</sub> along grain boundaries. Furthermore, IGC resistance was restored after treatment under three homogenized annealing conditions: 750 °C for 5 min, 780 °C for 2 min, and 800 °C for 30 s. This restoration was attributed to intragranular chromium atoms diffusing into the chromium-depleted zone during homogenization annealing, compensating for chromium loss from carbide precipitation. It has been confirmed that the self-healing of IGC in S44660 occurs through the process of controlling chromium diffusion by homogenizing annealing.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"247 ","pages":"Article 112783"},"PeriodicalIF":7.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-13DOI: 10.1016/j.corsci.2025.112764
Fei Xue , Yutong Hou , Jihui Wang , Wenbin Hu , Feixiong Mao , Liping Wang
Zn1-xLaxO film was prepared on SS304 steel surface by using hydrothermal method combined with the following heat treatment. The morphology, structure, composition, oxygen vacancy concentration and semiconductor type of film were determined. The corrosion resistance and resistive switching properties of film were analyzed by electrochemical tests and polarization-immersion experiments. The oxygen vacancy formation energy, surface adsorption energy and diffusion energy barrier of films were calculated by density functional theory (DFT). The experimental results show that the polarization treatment enables Zn1-xLaxO films switch between high and low resistance states cyclically and stably, and the excellent corrosion resistance and durability are achieved through resistive switching behavior of films. Polarization treatment can reduce the formation energy and diffusion barrier of oxygen vacancies, promoting the formation of oxygen vacancy conductive filaments in the thin film. Regulating the formation and fracture of oxygen vacancy conductive filaments can achieve cyclic switching between high and low resistance states. The film is in a state of constant repair, preventing the invasion of corrosive media through the formation and annihilation of oxygen vacancies, which provides a novel corrosion protection strategy.
{"title":"Theoretical and experimental study on the corrosion behavior of Zn1-xLaxO resistive switching film in 3.5 wt% NaCl solution","authors":"Fei Xue , Yutong Hou , Jihui Wang , Wenbin Hu , Feixiong Mao , Liping Wang","doi":"10.1016/j.corsci.2025.112764","DOIUrl":"10.1016/j.corsci.2025.112764","url":null,"abstract":"<div><div>Zn<sub>1-<em>x</em></sub>La<sub><em>x</em></sub>O film was prepared on SS304 steel surface by using hydrothermal method combined with the following heat treatment. The morphology, structure, composition, oxygen vacancy concentration and semiconductor type of film were determined. The corrosion resistance and resistive switching properties of film were analyzed by electrochemical tests and polarization-immersion experiments. The oxygen vacancy formation energy, surface adsorption energy and diffusion energy barrier of films were calculated by density functional theory (DFT). The experimental results show that the polarization treatment enables Zn<sub>1-<em>x</em></sub>La<sub><em>x</em></sub>O films switch between high and low resistance states cyclically and stably, and the excellent corrosion resistance and durability are achieved through resistive switching behavior of films. Polarization treatment can reduce the formation energy and diffusion barrier of oxygen vacancies, promoting the formation of oxygen vacancy conductive filaments in the thin film. Regulating the formation and fracture of oxygen vacancy conductive filaments can achieve cyclic switching between high and low resistance states. The film is in a state of constant repair, preventing the invasion of corrosive media through the formation and annihilation of oxygen vacancies, which provides a novel corrosion protection strategy.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"247 ","pages":"Article 112764"},"PeriodicalIF":7.4,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-13DOI: 10.1016/j.corsci.2025.112779
Dihao Chen , Chaofang Dong , George R. Engelhardt , Jie Qiu , Digby D. Macdonald
Unveiling the specific corrosion kinetics is of great interest to the corrosion assessment and service life prediction of metals. Herein, the impact of electric field on point defects migration, the concentration profile in-depth of defect densities, and the kinetic parameters of passivity for iron are studied, in combination of DFT calculations and experiments. The migration energy barriers of point defects within the passive film on iron are found to reduce linearly with increasing electric field strength. The exponential relation between the fluxes of point defects and the electric field is employed rather than Nernst-Plank relation. Prior to EIS optimization, some key parameters (i.e., α, β, and ) in the PDM are determined from Mott-Schottky analysis on the passive film in steady state. Values of parameters, such as transfer coefficients, standard rate constants, diffusion coefficient, electric field strength, steady-state thickness of the bl, and reaction order for H+, are obtained by optimizing EIS data, some of which are well validated by DFT calculation and XPS results. A combination of DFT calculations with electrochemical tests will be a possible way to improve the EIS optimization procedure in the PDM.
{"title":"Determination of kinetic parameters in the point defect model (PDM) for iron using electrochemical impedance spectroscopy and first-principles calculations","authors":"Dihao Chen , Chaofang Dong , George R. Engelhardt , Jie Qiu , Digby D. Macdonald","doi":"10.1016/j.corsci.2025.112779","DOIUrl":"10.1016/j.corsci.2025.112779","url":null,"abstract":"<div><div>Unveiling the specific corrosion kinetics is of great interest to the corrosion assessment and service life prediction of metals. Herein, the impact of electric field on point defects migration, the concentration profile in-depth of defect densities, and the kinetic parameters of passivity for iron are studied, in combination of DFT calculations and experiments. The migration energy barriers of point defects within the passive film on iron are found to reduce linearly with increasing electric field strength. The exponential relation between the fluxes of point defects and the electric field is employed rather than Nernst-Plank relation. Prior to EIS optimization, some key parameters (i.e., <em>α</em>, <em>β</em>,<span><math><mrow><mspace></mspace><msub><mrow><mi>α</mi></mrow><mrow><mn>5</mn></mrow></msub></mrow></math></span> and <span><math><msub><mrow><mi>α</mi></mrow><mrow><mn>6</mn></mrow></msub></math></span>) in the PDM are determined from Mott-Schottky analysis on the passive film in steady state. Values of parameters, such as transfer coefficients, standard rate constants, diffusion coefficient, electric field strength, steady-state thickness of the bl, and reaction order for H<sup>+</sup>, are obtained by optimizing EIS data, some of which are well validated by DFT calculation and XPS results. A combination of DFT calculations with electrochemical tests will be a possible way to improve the EIS optimization procedure in the PDM.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"248 ","pages":"Article 112779"},"PeriodicalIF":7.4,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-12DOI: 10.1016/j.corsci.2025.112778
Zhuocheng Li , Jiashu Li , Wenxiang Zhu , Jingjing Jiao , Bin Wang , Yong Tian , Xu Yang , Lingxu Yang , Huijun Liu , Bingxing Wang
This study examined the influence of tensile deformation on the microstructure evolution and corrosion behaviors of novel nitrogen-containing austenitic stainless steel in a simulated cathode environment for proton exchange membrane fuel cells. The results indicated that at ≤ 30 % deformation, the corrosion resistance was improved with increasing deformation level. This was attributed to dislocations and subgrain refinement promoting the formation of Cr2O3 and CrN, which inhibited F- from attacking the passive film due to lower oxygen vacancy concentrations. At a deformation level of 50 %, excessive dislocations and internal stress decreased the stability of the passive film and consequently reduced the corrosion resistance.
{"title":"Effect of tensile deformation on corrosion behavior of nitrogen-containing stainless steel bipolar plates in a simulated environment for proton exchange membrane fuel cells","authors":"Zhuocheng Li , Jiashu Li , Wenxiang Zhu , Jingjing Jiao , Bin Wang , Yong Tian , Xu Yang , Lingxu Yang , Huijun Liu , Bingxing Wang","doi":"10.1016/j.corsci.2025.112778","DOIUrl":"10.1016/j.corsci.2025.112778","url":null,"abstract":"<div><div>This study examined the influence of tensile deformation on the microstructure evolution and corrosion behaviors of novel nitrogen-containing austenitic stainless steel in a simulated cathode environment for proton exchange membrane fuel cells. The results indicated that at ≤ 30 % deformation, the corrosion resistance was improved with increasing deformation level. This was attributed to dislocations and subgrain refinement promoting the formation of Cr<sub>2</sub>O<sub>3</sub> and CrN, which inhibited F<sup>-</sup> from attacking the passive film due to lower oxygen vacancy concentrations. At a deformation level of 50 %, excessive dislocations and internal stress decreased the stability of the passive film and consequently reduced the corrosion resistance.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"247 ","pages":"Article 112778"},"PeriodicalIF":7.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-12DOI: 10.1016/j.corsci.2025.112767
Ru Yan , Xiao Zhang , Xiang Gao , Wei He , Houyi Ma
PAM formed by self-organization can be considered as nanocontainers of phytic acid (PA) molecules and used for the corrosion protection of metal materials. Herein, self-strengthening PAM-Zn conversion films were successfully constructed on CRS substrate by a simple dipping method. The highest protection efficiency of PAM-Zn films was 81.0 % and was further increased beyond 90 % after immersion in NaCl solution. The immersion treatment in NaCl solution not only promoted the formation of moreand PAM-Zn complex, but also changed the surface microstructure and increased the film thickness and compactness, thereby leading to the great enhancement of anti-corrosion performance.
{"title":"Self-strengthening phytic acid micelle(PAM)-Zn complex film fabricated on cold rolled steel (CRS) for corrosion protection","authors":"Ru Yan , Xiao Zhang , Xiang Gao , Wei He , Houyi Ma","doi":"10.1016/j.corsci.2025.112767","DOIUrl":"10.1016/j.corsci.2025.112767","url":null,"abstract":"<div><div>PAM formed by self-organization can be considered as nanocontainers of phytic acid (PA) molecules and used for the corrosion protection of metal materials. Herein, self-strengthening PAM-Zn conversion films were successfully constructed on CRS substrate by a simple dipping method. The highest protection efficiency of PAM-Zn films was 81.0 % and was further increased beyond 90 % after immersion in NaCl solution. The immersion treatment in NaCl solution not only promoted the formation of more<span><math><mrow><mi>P</mi><msubsup><mrow><mi>O</mi></mrow><mrow><mn>4</mn></mrow><mrow><mn>3</mn><mo>−</mo></mrow></msubsup></mrow></math></span>and PAM-Zn complex, but also changed the surface microstructure and increased the film thickness and compactness, thereby leading to the great enhancement of anti-corrosion performance.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"247 ","pages":"Article 112767"},"PeriodicalIF":7.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-12DOI: 10.1016/j.corsci.2025.112769
Andressa Trentin , Ahmad Mardoukhi , Aloshious Lambai , Pekka Pohjanne , Elina Huttunen-Saarivirta
The pitting behavior of seven stainless steel grades with austenitic and duplex microstructures in varying acids (HCl, H2SO4, HCOOH), chloride concentrations (500–5000 mg/L), and pHs (2.5, 4.0) was investigated at 90°C. Low- and intermediate-PREN grades were prone to pitting under the test conditions. The electrolyte ranking by pitting susceptibility was HCl > H2SO4 > HCOOH, while the progress of pitting attack in materials followed the reverse order: HCOOH > H2SO4 > HCl. The presence of a lacy cover prevents repassivation favoring a concentric "Russian doll" structure and high loss rates. The mechanisms of pitting propagation are presented in this paper.
{"title":"Pitting corrosion of austenitic and duplex stainless steels in dilute acids at elevated temperature: Effect of electrolyte chemistry and material microstructure","authors":"Andressa Trentin , Ahmad Mardoukhi , Aloshious Lambai , Pekka Pohjanne , Elina Huttunen-Saarivirta","doi":"10.1016/j.corsci.2025.112769","DOIUrl":"10.1016/j.corsci.2025.112769","url":null,"abstract":"<div><div>The pitting behavior of seven stainless steel grades with austenitic and duplex microstructures in varying acids (HCl, H<sub>2</sub>SO<sub>4</sub>, HCOOH), chloride concentrations (500–5000 mg/L), and pHs (2.5, 4.0) was investigated at 90°C. Low- and intermediate-PREN grades were prone to pitting under the test conditions. The electrolyte ranking by pitting susceptibility was HCl > H<sub>2</sub>SO<sub>4</sub> > HCOOH, while the progress of pitting attack in materials followed the reverse order: HCOOH > H<sub>2</sub>SO<sub>4</sub> > HCl. The presence of a lacy cover prevents repassivation favoring a concentric \"Russian doll\" structure and high loss rates. The mechanisms of pitting propagation are presented in this paper.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"247 ","pages":"Article 112769"},"PeriodicalIF":7.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-12DOI: 10.1016/j.corsci.2025.112777
Kaiwang Chen , Lei Yuan , Qiang Gu , Guoqi Liu , Jingkun Yu , Hongxia Li
The clogging behavior of a new ZrO2-C submerged entry nozzle (SEN) in the industrial production of ultra-low carbon steel was studied. The results revealed that, compared to the Al2O3-C SEN, the clogging thickness at the ZrO2-C SEN outlet was reduced by over 20 % to the formation of a dense protective layer composed of CaO-Al2O3-SiO2 at the interface near the molten steel. Additionally, the corrosion layer formed within the ZrO2-C SEN effectively prevented decarburization and diffusion of CO. The use of the ZrO2-C SEN improved the qualification rate of the liquid level fluctuation and the defect rate of the slab was reduced by approximately 17 %. The related reactions occurring inside the nozzle were simulated and compared with the experimental results in detail.
{"title":"Insights into clogging behavior of Al2O3-C and ZrO2-C submerged entry nozzle during continuous casting of ultra-low carbon steel","authors":"Kaiwang Chen , Lei Yuan , Qiang Gu , Guoqi Liu , Jingkun Yu , Hongxia Li","doi":"10.1016/j.corsci.2025.112777","DOIUrl":"10.1016/j.corsci.2025.112777","url":null,"abstract":"<div><div>The clogging behavior of a new ZrO<sub>2</sub>-C submerged entry nozzle (SEN) in the industrial production of ultra-low carbon steel was studied. The results revealed that, compared to the Al<sub>2</sub>O<sub>3</sub>-C SEN, the clogging thickness at the ZrO<sub>2</sub>-C SEN outlet was reduced by over 20 % to the formation of a dense protective layer composed of CaO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> at the interface near the molten steel. Additionally, the corrosion layer formed within the ZrO<sub>2</sub>-C SEN effectively prevented decarburization and diffusion of CO. The use of the ZrO<sub>2</sub>-C SEN improved the qualification rate of the liquid level fluctuation and the defect rate of the slab was reduced by approximately 17 %. The related reactions occurring inside the nozzle were simulated and compared with the experimental results in detail.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"246 ","pages":"Article 112777"},"PeriodicalIF":7.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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