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Exceptional hot corrosion resistance behavior and mechanism of double layered Zr6Ta2O17/YSZ thermal barrier coatings exposed to Na2SO4-V2O5 salt
IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Corrosion Science
Pub Date : 2025-02-03 DOI: 10.1016/j.corsci.2025.112761
Z.Y. Tan , T.T. Pan , M. Nie , Y.B. Peng , P. Wen , J.H. Luo , L. Yang , Y.C. Zhou
Single-ceramic-layered YSZ thermal barrier coatings (TBCs) and double- ceramic-layered Zr6Ta2O17/YSZ TBCs were deposited using atmospheric plasma spray (APS). Hot corrosion tests were conducted by exposing the coatings to 50 wt% Na2SO4-50 wt% V2O5 molten salt at temperatures of 800 ℃, 900 ℃ and 1000 ℃ for durations of 8 h, 24 h and 48 h respectively. The hot corrosion behavior and mechanism of the coatings were discussed. All corroded YSZ coatings exhibited severe edge cracking, peeling, and surface pulverization due to the significant loss of stabilizer Y2O3. Zr6Ta2O17/YSZ showed superior corrosion resistance compared to traditional YSZ, which maintained intact coating structure below the medium temperature (900 ℃). This is attributed to the reaction inertness between Zr6Ta2O17 and V2O5, highlighting the role of Zr6Ta2O17 in preventing extensive surface contact between V2O5 and YSZ. The formation and decomposition of NaTaO4 phase at 1000 ℃ are the main reasons for the destruction of the double-layered structure. The decomposition product Ta2O5 accelerated the formation of Zr6Ta2O17/Ta2O5 eutectic structure; furthermore, the accumulation of Ta2O5 in coating defects reduced the strain tolerance. Thermodynamic calculations illustrate that (Y/La/Gd/Yb/Sm)2O3 has high reactivity with V2O5, while the reaction between Ta2O5 and Na2SO4 is thermodynamically unfavorable. The study proposes design principles for TBCs resistant to Na2SO4-V2O5 salt corrosion, emphasizing the importance of avoiding the synergistic effects of corrosion salts across all temperature ranges through multi-layer isolation.
{"title":"Exceptional hot corrosion resistance behavior and mechanism of double layered Zr6Ta2O17/YSZ thermal barrier coatings exposed to Na2SO4-V2O5 salt","authors":"Z.Y. Tan ,&nbsp;T.T. Pan ,&nbsp;M. Nie ,&nbsp;Y.B. Peng ,&nbsp;P. Wen ,&nbsp;J.H. Luo ,&nbsp;L. Yang ,&nbsp;Y.C. Zhou","doi":"10.1016/j.corsci.2025.112761","DOIUrl":"10.1016/j.corsci.2025.112761","url":null,"abstract":"<div><div>Single-ceramic-layered YSZ thermal barrier coatings (TBCs) and double- ceramic-layered Zr<sub>6</sub>Ta<sub>2</sub>O<sub>17</sub>/YSZ TBCs were deposited using atmospheric plasma spray (APS). Hot corrosion tests were conducted by exposing the coatings to 50 wt% Na<sub>2</sub>SO<sub>4</sub>-50 wt% V<sub>2</sub>O<sub>5</sub> molten salt at temperatures of 800 ℃, 900 ℃ and 1000 ℃ for durations of 8 h, 24 h and 48 h respectively. The hot corrosion behavior and mechanism of the coatings were discussed. All corroded YSZ coatings exhibited severe edge cracking, peeling, and surface pulverization due to the significant loss of stabilizer Y<sub>2</sub>O<sub>3</sub>. Zr<sub>6</sub>Ta<sub>2</sub>O<sub>17</sub>/YSZ showed superior corrosion resistance compared to traditional YSZ, which maintained intact coating structure below the medium temperature (900 ℃). This is attributed to the reaction inertness between Zr<sub>6</sub>Ta<sub>2</sub>O<sub>17</sub> and V<sub>2</sub>O<sub>5</sub>, highlighting the role of Zr<sub>6</sub>Ta<sub>2</sub>O<sub>17</sub> in preventing extensive surface contact between V<sub>2</sub>O<sub>5</sub> and YSZ. The formation and decomposition of NaTaO<sub>4</sub> phase at 1000 ℃ are the main reasons for the destruction of the double-layered structure. The decomposition product Ta<sub>2</sub>O<sub>5</sub> accelerated the formation of Zr<sub>6</sub>Ta<sub>2</sub>O<sub>17</sub>/Ta<sub>2</sub>O<sub>5</sub> eutectic structure; furthermore, the accumulation of Ta<sub>2</sub>O<sub>5</sub> in coating defects reduced the strain tolerance. Thermodynamic calculations illustrate that (Y/La/Gd/Yb/Sm)<sub>2</sub>O<sub>3</sub> has high reactivity with V<sub>2</sub>O<sub>5</sub>, while the reaction between Ta<sub>2</sub>O<sub>5</sub> and Na<sub>2</sub>SO<sub>4</sub> is thermodynamically unfavorable. The study proposes design principles for TBCs resistant to Na<sub>2</sub>SO<sub>4</sub>-V<sub>2</sub>O<sub>5</sub> salt corrosion, emphasizing the importance of avoiding the synergistic effects of corrosion salts across all temperature ranges through multi-layer isolation.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"246 ","pages":"Article 112761"},"PeriodicalIF":7.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143394484","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}
引用次数: 0
Synergistic improvement of corrosion-strength of Al-Mg alloy by trace Sc/Zr and TiB2 particles
IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Corrosion Science
Pub Date : 2025-02-01 DOI: 10.1016/j.corsci.2025.112760
Xinchen Li , Kai Zhao , Xuekai Li , Bingzhi Li , Liyuan Yang , Enyu Guo , Huijun Kang , Zongning Chen , Tongmin Wang
Intergranular corrosion (IGC) induced by the Mg-rich (β-Al3Mg2) precipitates in Al-Mg alloys during service presents significant safety risks and limits material development. Introducing trace Sc-Zr elements and TiB2 particles into the alloy creates a dual heterostructure with abundant low-angle grain boundaries (LAGBs). The L12-Al3(Sc,Zr) nano-precipitates inhibit recrystallization and stabilize the microstructure by pinning grain boundaries. TiB2 particles refine the grain structure and promote LAGBs formation, reducing Mg-rich phase precipitation along grain boundaries. This alloy achieves high yield strength (∼381.5 MPa), elongation (∼11.2 %), and excellent IGC resistance, offering a novel approach to balancing mechanical properties and corrosion resistance in Al-Mg alloys.
{"title":"Synergistic improvement of corrosion-strength of Al-Mg alloy by trace Sc/Zr and TiB2 particles","authors":"Xinchen Li ,&nbsp;Kai Zhao ,&nbsp;Xuekai Li ,&nbsp;Bingzhi Li ,&nbsp;Liyuan Yang ,&nbsp;Enyu Guo ,&nbsp;Huijun Kang ,&nbsp;Zongning Chen ,&nbsp;Tongmin Wang","doi":"10.1016/j.corsci.2025.112760","DOIUrl":"10.1016/j.corsci.2025.112760","url":null,"abstract":"<div><div>Intergranular corrosion (IGC) induced by the Mg-rich (β-Al<sub>3</sub>Mg<sub>2</sub>) precipitates in Al-Mg alloys during service presents significant safety risks and limits material development. Introducing trace Sc-Zr elements and TiB<sub>2</sub> particles into the alloy creates a dual heterostructure with abundant low-angle grain boundaries (LAGBs). The L1<sub>2</sub>-Al<sub>3</sub>(Sc,Zr) nano-precipitates inhibit recrystallization and stabilize the microstructure by pinning grain boundaries. TiB<sub>2</sub> particles refine the grain structure and promote LAGBs formation, reducing Mg-rich phase precipitation along grain boundaries. This alloy achieves high yield strength (∼381.5 MPa), elongation (∼11.2 %), and excellent IGC resistance, offering a novel approach to balancing mechanical properties and corrosion resistance in Al-Mg alloys.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"246 ","pages":"Article 112760"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349520","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}
引用次数: 0
Microstructure and oxidation resistance of Ti/Si modified IN 718 coatings: An exploratory research from the perspective of crystal plane modulation
IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Corrosion Science
Pub Date : 2025-02-01 DOI: 10.1016/j.corsci.2024.112603
Zhicheng Liu , Jie Zhou , Yongqiang Zhou , Wenyi Peng , Yuhai Qu , Changshuang Jiang , Panyi Huang , Xiaohua Deng , Zhiwei Deng , Aisheng Zhang , Rixin Liu , Xianzhi Luo , Chunyan Hu
Ti/Si modified Inconel 718 coatings were produced by plasma cladding respectively, and investigated with experiments and first principles calculations. Si promoted equiaxial crystalline transformation of Inconel 718, Cr2O3 and SiO2 double oxides improved coating's oxidation resistance. Ti inhibited the growth of γ (100) plane with inferior oxidation resistance and promoted the growth of γ (111) plane with superior oxidation resistance, the coating was interspersed with columnar crystals and equiaxial crystals, the oxidation resistance of the coating enhanced dramatically. The work provides a new insight for the study of high-temperature alloy oxidation resistance from the perspective of crystal plane modulation.
{"title":"Microstructure and oxidation resistance of Ti/Si modified IN 718 coatings: An exploratory research from the perspective of crystal plane modulation","authors":"Zhicheng Liu ,&nbsp;Jie Zhou ,&nbsp;Yongqiang Zhou ,&nbsp;Wenyi Peng ,&nbsp;Yuhai Qu ,&nbsp;Changshuang Jiang ,&nbsp;Panyi Huang ,&nbsp;Xiaohua Deng ,&nbsp;Zhiwei Deng ,&nbsp;Aisheng Zhang ,&nbsp;Rixin Liu ,&nbsp;Xianzhi Luo ,&nbsp;Chunyan Hu","doi":"10.1016/j.corsci.2024.112603","DOIUrl":"10.1016/j.corsci.2024.112603","url":null,"abstract":"<div><div>Ti/Si modified Inconel 718 coatings were produced by plasma cladding respectively, and investigated with experiments and first principles calculations. Si promoted equiaxial crystalline transformation of Inconel 718, Cr<sub>2</sub>O<sub>3</sub> and SiO<sub>2</sub> double oxides improved coating's oxidation resistance. Ti inhibited the growth of γ (100) plane with inferior oxidation resistance and promoted the growth of γ (111) plane with superior oxidation resistance, the coating was interspersed with columnar crystals and equiaxial crystals, the oxidation resistance of the coating enhanced dramatically. The work provides a new insight for the study of high-temperature alloy oxidation resistance from the perspective of crystal plane modulation.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112603"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105388","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}
引用次数: 0
Surface texture evolution of weathering steel in corrosive marine atmospheres: Geospatial variability and explainable machine learning models
IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Corrosion Science
Pub Date : 2025-02-01 DOI: 10.1016/j.corsci.2024.112602
Lianheng Cai, Aran Kim, Shigenobu Kainuma
The surface texture of 144 weathering steel samples were analyzed under marine atmospheres to assess the effects of the exposure conditions and structural factors. Comprehensive methods were used to characterize the corrosion evolution and pitting performance. Geospatial variability was introduced as a new method for quantifying non-uniform and irregular surface substrates. The results showed significant variations in corrosion severity under identical environmental conditions. Closely spaced pits formed clustered patterns with an increased range, whereas isolated sparse pits demonstrated the converse. Sill effectively captured serrated surface variations. Explainable machine learning models were developed to regenerate and predict the steel surface texture.
{"title":"Surface texture evolution of weathering steel in corrosive marine atmospheres: Geospatial variability and explainable machine learning models","authors":"Lianheng Cai,&nbsp;Aran Kim,&nbsp;Shigenobu Kainuma","doi":"10.1016/j.corsci.2024.112602","DOIUrl":"10.1016/j.corsci.2024.112602","url":null,"abstract":"<div><div>The surface texture of 144 weathering steel samples were analyzed under marine atmospheres to assess the effects of the exposure conditions and structural factors. Comprehensive methods were used to characterize the corrosion evolution and pitting performance. Geospatial variability was introduced as a new method for quantifying non-uniform and irregular surface substrates. The results showed significant variations in corrosion severity under identical environmental conditions. Closely spaced pits formed clustered patterns with an increased range, whereas isolated sparse pits demonstrated the converse. Sill effectively captured serrated surface variations. Explainable machine learning models were developed to regenerate and predict the steel surface texture.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112602"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104477","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}
引用次数: 0
Unexpected pitting inhibition of additively-manufactured austenitic stainless steel by electrochemical hydrogen-charging
IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Corrosion Science
Pub Date : 2025-02-01 DOI: 10.1016/j.corsci.2024.112598
Mingyang Wang , Xingda Tian , Yong Liu , Zhiyi Ding , Juan Hou , Aiying Chen
Pitting of austenitic stainless steel (SS) is intensified under hydrogen environment, resulting in great uncertainty of safety. However, austenitic SS printed by selective laser melting (SLM) after electrochemical hydrogen-charging manifests an unanticipatedly anti-pitting behavior. Pitting resistance is found in all the SLM samples after H-charging, while the original SLM and all the commercial SS samples are composed of corrosive pits on the surfaces. XRD, EBSD and TEM observations of SLM sample after H-charging reveal that nanotwins and ɛ-phase are newly formed interior of the cellular cells, which inhibit martensite transformation and enhance the formation of Cr oxides in passivation film.
{"title":"Unexpected pitting inhibition of additively-manufactured austenitic stainless steel by electrochemical hydrogen-charging","authors":"Mingyang Wang ,&nbsp;Xingda Tian ,&nbsp;Yong Liu ,&nbsp;Zhiyi Ding ,&nbsp;Juan Hou ,&nbsp;Aiying Chen","doi":"10.1016/j.corsci.2024.112598","DOIUrl":"10.1016/j.corsci.2024.112598","url":null,"abstract":"<div><div>Pitting of austenitic stainless steel (SS) is intensified under hydrogen environment, resulting in great uncertainty of safety. However, austenitic SS printed by selective laser melting (SLM) after electrochemical hydrogen-charging manifests an unanticipatedly anti-pitting behavior. Pitting resistance is found in all the SLM samples after H-charging, while the original SLM and all the commercial SS samples are composed of corrosive pits on the surfaces. XRD, EBSD and TEM observations of SLM sample after H-charging reveal that nanotwins and ɛ-phase are newly formed interior of the cellular cells, which inhibit martensite transformation and enhance the formation of Cr oxides in passivation film.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112598"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104478","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}
引用次数: 0
On the impact of Cr and Ag additions on the grain boundary microchemistry, hydrogen permeability and environmentally assisted cracking mechanism of an Al-Zn-Mg-Cu-Zr 7xxx alloy
IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Corrosion Science
Pub Date : 2025-01-31 DOI: 10.1016/j.corsci.2025.112759
Chijioke Kenneth Akuata , Oliver Beyß , Lisa.T. Belkacemi , Kerstin Hantzsche , Matthew E. Curd , Daniela Zander
This study explored the impact of minor Cr and Ag additions on the resistance of a new generation Al-8Zn-2Mg-2Cu-0.1Zr alloy to hydrogen environmentally assisted cracking (HEAC) in humid air. The results show that HEAC in Al-8Zn-2Mg-2Cu-0.1Zr alloy can be suppressed by 0.1 wt% Cr addition, due to the formation of E-Al18Mg3Cr2 dispersoids with a high H binding energy and possibly a less electrochemically active grain boundary (GB) microchemistry. ∼ 0.3 wt% Ag addition in Al-8Zn-2Mg-2Cu-0.1Zr alloy had no influence on the HEAC susceptibility, despite 1 at% Ag partitioning in the GB η-Mg(Zn,Cu,Al)2 and a minor decrease in the PFZ width.
{"title":"On the impact of Cr and Ag additions on the grain boundary microchemistry, hydrogen permeability and environmentally assisted cracking mechanism of an Al-Zn-Mg-Cu-Zr 7xxx alloy","authors":"Chijioke Kenneth Akuata ,&nbsp;Oliver Beyß ,&nbsp;Lisa.T. Belkacemi ,&nbsp;Kerstin Hantzsche ,&nbsp;Matthew E. Curd ,&nbsp;Daniela Zander","doi":"10.1016/j.corsci.2025.112759","DOIUrl":"10.1016/j.corsci.2025.112759","url":null,"abstract":"<div><div>This study explored the impact of minor Cr and Ag additions on the resistance of a new generation Al-8Zn-2Mg-2Cu-0.1Zr alloy to hydrogen environmentally assisted cracking (HEAC) in humid air. The results show that HEAC in Al-8Zn-2Mg-2Cu-0.1Zr alloy can be suppressed by 0.1 wt% Cr addition, due to the formation of E-Al<sub>18</sub>Mg<sub>3</sub>Cr<sub>2</sub> dispersoids with a high H binding energy and possibly a less electrochemically active grain boundary (GB) microchemistry. ∼ 0.3 wt% Ag addition in Al-8Zn-2Mg-2Cu-0.1Zr alloy had no influence on the HEAC susceptibility, despite 1 at% Ag partitioning in the GB <em>η</em>-Mg(Zn,Cu,Al)<sub>2</sub> and a minor decrease in the PFZ width.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"246 ","pages":"Article 112759"},"PeriodicalIF":7.4,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143175884","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}
引用次数: 0
Corrosion mechanisms of EH40 steel induced by extracellular polymeric substances from Halomonas titanicae cultivated under aerobic and anaerobic conditions
IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Corrosion Science
Pub Date : 2025-01-31 DOI: 10.1016/j.corsci.2025.112758
Mengyu Fu, Muqiu Xia, Li Lai, Shihang Lu, Shiqiang Chen, Guangzhou Liu
This study analyzed six extracellular polymeric substances (EPS) of Halomonas titanicae under aerobic (S-EPS, LB-EPS, TB-EPS) and anaerobic conditions (S-EPS', LB-EPS', TB-EPS'), investigating their corrosion impact on EH40 steel. Results indicate that S-EPS and S-EPS', primarily composed of humic acids and soluble microbial products, demonstrate an initial capacity for corrosion inhibition; however, this efficacy diminishes progressively with time. In contrast, protein-rich B-EPS and B-EPS' interact more strongly with the surface, particularly TB-EPS and TB-EPS', causing significant uneven corrosion. Furthermore, oxygen reduces EPS stability and interaction with steel, with corrosion effects more pronounced in anaerobic environments, especially for LB-EPS' and TB-EPS'.
{"title":"Corrosion mechanisms of EH40 steel induced by extracellular polymeric substances from Halomonas titanicae cultivated under aerobic and anaerobic conditions","authors":"Mengyu Fu,&nbsp;Muqiu Xia,&nbsp;Li Lai,&nbsp;Shihang Lu,&nbsp;Shiqiang Chen,&nbsp;Guangzhou Liu","doi":"10.1016/j.corsci.2025.112758","DOIUrl":"10.1016/j.corsci.2025.112758","url":null,"abstract":"<div><div>This study analyzed six extracellular polymeric substances (EPS) of <em>Halomonas titanicae</em> under aerobic (S-EPS, LB-EPS, TB-EPS) and anaerobic conditions (S-EPS', LB-EPS', TB-EPS'), investigating their corrosion impact on EH40 steel. Results indicate that S-EPS and S-EPS', primarily composed of humic acids and soluble microbial products, demonstrate an initial capacity for corrosion inhibition; however, this efficacy diminishes progressively with time. In contrast, protein-rich B-EPS and B-EPS' interact more strongly with the surface, particularly TB-EPS and TB-EPS', causing significant uneven corrosion. Furthermore, oxygen reduces EPS stability and interaction with steel, with corrosion effects more pronounced in anaerobic environments, especially for LB-EPS' and TB-EPS'.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"246 ","pages":"Article 112758"},"PeriodicalIF":7.4,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143175885","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}
引用次数: 0
Femtosecond laser-induced micro/nanostructures facilitated multiple passivation and long-term anti-corrosion property of laser powder bed fused Ti-6Al-4V alloy
IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Corrosion Science
Pub Date : 2025-01-30 DOI: 10.1016/j.corsci.2025.112757
Jinpeng Fang , Lai-Chang Zhang , Nianwei Dai , Ruixiang Liu , Hao Yao , Zhaoxin Lao , Chao Chen , Yachao Zhang , Sizhu Wu
The formation of non-equilibrium phases and microstructural defects reduces the passivation performance and corrosion resistance of laser powder bed fusion (LPBF) produced Ti-6Al-4V alloy, threatening its safe service as important components. This work aims to enhance the corrosion resistance of LPBF-produced Ti-6Al-4V alloy through femtosecond laser surface processing (FLSP). FLSP at lower powers (<300 mW) or higher powers (>400 mW) creates uniform layers of periodic nanostructures and hierarchical micro/nanostructures on the alloy surface. The prolonged exposure to air significantly accelerates the oxidation of Ti2 + to Ti4+ on FLSP-induced micro/nanostructures, resulting in multiple passivation behaviors and remarkable improvement in corrosion resistance.
{"title":"Femtosecond laser-induced micro/nanostructures facilitated multiple passivation and long-term anti-corrosion property of laser powder bed fused Ti-6Al-4V alloy","authors":"Jinpeng Fang ,&nbsp;Lai-Chang Zhang ,&nbsp;Nianwei Dai ,&nbsp;Ruixiang Liu ,&nbsp;Hao Yao ,&nbsp;Zhaoxin Lao ,&nbsp;Chao Chen ,&nbsp;Yachao Zhang ,&nbsp;Sizhu Wu","doi":"10.1016/j.corsci.2025.112757","DOIUrl":"10.1016/j.corsci.2025.112757","url":null,"abstract":"<div><div>The formation of non-equilibrium phases and microstructural defects reduces the passivation performance and corrosion resistance of laser powder bed fusion (LPBF) produced Ti-6Al-4V alloy, threatening its safe service as important components. This work aims to enhance the corrosion resistance of LPBF-produced Ti-6Al-4V alloy through femtosecond laser surface processing (FLSP). FLSP at lower powers (&lt;300 mW) or higher powers (&gt;400 mW) creates uniform layers of periodic nanostructures and hierarchical micro/nanostructures on the alloy surface. The prolonged exposure to air significantly accelerates the oxidation of Ti<sup>2 +</sup> to Ti<sup>4+</sup> on FLSP-induced micro/nanostructures, resulting in multiple passivation behaviors and remarkable improvement in corrosion resistance.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"246 ","pages":"Article 112757"},"PeriodicalIF":7.4,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143175890","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}
引用次数: 0
Counterintuitive passivation role of manganese in stainless steel under high potential in neutral NaCl solution
IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Corrosion Science
Pub Date : 2025-01-30 DOI: 10.1016/j.corsci.2025.112756
K.P. Yu, X.L. Chen, K.Q. Ye, M.X. Huang
The passivation behavior of a cast Fe-20.7Cr-17.7Mn-20.2Co-1.7Si alloy in a 3.5 wt% NaCl solution was investigated with an inclined focus on the passivation role of Mn. A two-stage passivation process was observed: initial Cr-based passivation, followed by Mn-based secondary passivation around 710 mV/SCE. As the potential increases, oxides in the passive film gradually transform into hydroxides, and the film itself becomes more defective. MnO2 formation drives the secondary passivation, enhancing corrosion resistance by reducing defects and increasing the thickness of the passive film. This study provides insights into the unexpected passivation behavior of Mn at high potentials.
{"title":"Counterintuitive passivation role of manganese in stainless steel under high potential in neutral NaCl solution","authors":"K.P. Yu,&nbsp;X.L. Chen,&nbsp;K.Q. Ye,&nbsp;M.X. Huang","doi":"10.1016/j.corsci.2025.112756","DOIUrl":"10.1016/j.corsci.2025.112756","url":null,"abstract":"<div><div>The passivation behavior of a cast Fe-20.7Cr-17.7Mn-20.2Co-1.7Si alloy in a 3.5 wt% NaCl solution was investigated with an inclined focus on the passivation role of Mn. A two-stage passivation process was observed: initial Cr-based passivation, followed by Mn-based secondary passivation around 710 mV/SCE. As the potential increases, oxides in the passive film gradually transform into hydroxides, and the film itself becomes more defective. MnO<sub>2</sub> formation drives the secondary passivation, enhancing corrosion resistance by reducing defects and increasing the thickness of the passive film. This study provides insights into the unexpected passivation behavior of Mn at high potentials.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"246 ","pages":"Article 112756"},"PeriodicalIF":7.4,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176826","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}
引用次数: 0
Mechanisms of defect-promoted oxidation and carburization in austenitic stainless steels and the beneficial role of Al on defect elimination
IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Corrosion Science
Pub Date : 2025-01-30 DOI: 10.1016/j.corsci.2025.112755
Qiyin Zhou , Jianye Chen , Huigang Shi , Lefu Zhang , Yanping Huang , Gen Zhang , Yongfu Zhao , Xianglong Guo
A systematic study was conducted on an alumina-forming austenitic (AFA) stainless steel exposed to 650°C/15 MPa supercritical carbon dioxide. Results show that AFA exhibits superior corrosion resistance compared with its austenitic stainless steel (ASS) counterpart. The Cr2O3 film in ASS exhibits numerous defects, attributed to the counter-diffusion of Cr3 + and O2- and the oxide growth stress. Through trace Al addition (∼2.5 wt%), a slowly growth Al2O3/ Cr2O3 bilayer oxide film on AFA effectively prevents the formation of pores and cracks. High-resolution characterization and atomic modeling results demonstrate that defect-free oxide films exhibit exceptional protective properties against both oxidation and carburization.
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