Corrosion SciencePub Date : 2025-06-22DOI: 10.1016/j.corsci.2025.113136
Chong Zhang, Wei Li, Fengshi Yin, Kai Zhao, Jinzhao Sun
{"title":"Enhancing wear and corrosion resistance of Al-Zn-Mg-Cu alloy via HVAF sprayed AlCrFe2Ni2(MoNb)0.2 high entropy alloy coating","authors":"Chong Zhang, Wei Li, Fengshi Yin, Kai Zhao, Jinzhao Sun","doi":"10.1016/j.corsci.2025.113136","DOIUrl":"10.1016/j.corsci.2025.113136","url":null,"abstract":"<div><div>One AlCrFe<sub>2</sub>Ni<sub>2</sub>(MoNb)<sub>0.2</sub> HEA coating is prepared on the 7A04 high-strength Al alloy substrate by the high-velocity air fuel spray technique to enhance surface performance. The coating exhibits a dense microstructure (0.245 % porosity) with dual-phase characteristics: (1) hot deformed particle regions retaining original B2/Laves phases and (2) severe plastic deformation regions featuring recrystallized nano-scale grains (∼80 nm), dislocations and dissolved B2/Laves phases. This bimodal microstructure originates from differential powder heating temperature during deposition. The coating exhibits a hardness of 605.9 HV<sub>0.05</sub>, with a wear rate (5.39 ×10<sup>−5</sup> mm<sup>3</sup>·N<sup>−1</sup>·m<sup>−1</sup>) two orders lower than the substrate (1.48 ×10<sup>−3</sup> mm<sup>3</sup>·N<sup>−1</sup>·m<sup>−1</sup>) under identical wear conditions, primarily attributed to the load-bearing effect of hard phases in hot deformed particle regions. The predominant wear mechanism during the sliding wear test is fatigue wear, combined with abrasive wear and oxidative wear. The corrosion resistance of HEA coating is comparable to 316 L stainless steel, owing to the rapid formation ability of the passive film. However, micro-galvanic coupling between cathodic Laves phases and anodic BCC matrix in hot deformed particle regions promotes localized corrosion initiation. This work demonstrates an effective surface engineering strategy for improving aluminum alloy component protection performance in combined wear-corrosion environments.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"255 ","pages":"Article 113136"},"PeriodicalIF":7.4,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338720","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}
Corrosion SciencePub Date : 2025-06-20DOI: 10.1016/j.corsci.2025.113129
Arshad Yazdanpanah , Mattia Franceschi , Gioele Pagot , Mona Khodabakhshi , Edoardo Fassinato , Lisa Zotta , Theresa Hanemann , Abdul Shaafi Shaikh , Vito Di Noto , Iris De Graeve , Katya Brunelli , Reynier I. Revilla
{"title":"Passivity and breakdown mechanisms in laser powder bed fusion processed Ni-based Alloy 625: Influence of scan strategy","authors":"Arshad Yazdanpanah , Mattia Franceschi , Gioele Pagot , Mona Khodabakhshi , Edoardo Fassinato , Lisa Zotta , Theresa Hanemann , Abdul Shaafi Shaikh , Vito Di Noto , Iris De Graeve , Katya Brunelli , Reynier I. Revilla","doi":"10.1016/j.corsci.2025.113129","DOIUrl":"10.1016/j.corsci.2025.113129","url":null,"abstract":"<div><div>This study investigates the influence of scan strategy on the microstructure, electrochemical behaviour, and passive film stability of Ni-Cr-based Alloy 625 fabricated via Laser Powder Bed Fusion (L-PBF). Four distinct scan strategies of No Pattern 180, No Pattern, Stripes, and Chess were evaluated under identical processing parameters. While hardness and subgrain size remained largely unaffected, significant differences were observed in dislocation density, which strongly correlated with passive layer integrity. Electrochemical analyses revealed that higher dislocation densities, particularly in the No Pattern 180 strategy, led to lower current densities in both passive and breakdown regions, despite similar corrosion potentials and Volta-potential values across all strategies. Mott-Schottky analysis confirmed reduced defect densities in the passive oxide layer of high-dislocation samples, and potentiostatic testing under tensile loading showed fewer breakdown events compared to low-dislocation samples. The results emphasize the importance of scan strategy choice not only for mechanical properties, but also for optimising corrosion resistance in additively manufactured components.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"255 ","pages":"Article 113129"},"PeriodicalIF":7.4,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321290","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}
Corrosion SciencePub Date : 2025-06-19DOI: 10.1016/j.corsci.2025.113126
Xiaofeng Zhao, Chong Sun, Jianbo Sun, Weijian Yang, Xueqiang Lin
{"title":"Insights into the corrosion evolution of X65 steel in water-saturated supercritical CO2 streams containing O2 and SO2 impurities","authors":"Xiaofeng Zhao, Chong Sun, Jianbo Sun, Weijian Yang, Xueqiang Lin","doi":"10.1016/j.corsci.2025.113126","DOIUrl":"10.1016/j.corsci.2025.113126","url":null,"abstract":"<div><div>The corrosion evolution behavior of X65 steel in water-saturated supercritical CO<sub>2</sub> streams with the impurities of 1000 ppmv O<sub>2</sub> and 1000 ppmv SO<sub>2</sub> at 8 MPa and 50 ºC was investigated mainly by in-situ observation and electrochemical measurement. H<sub>2</sub>SO<sub>4</sub> generated by impurity reaction promotes the precipitation of aqueous phase and dominates the FeSO<sub>4</sub> film formation at the initial corrosion stage. With the corrosion proceeds, the corrosion product film with outer FeOOH layer and inner FeSO<sub>4</sub> layer ultimately forms due to the oxidation of FeSO<sub>4</sub>. The time-dependent variation of corrosion kinetics is closely associated with the evolution of corrosion product film characteristics. A schematic model is established to depict the corrosion evolution process.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"255 ","pages":"Article 113126"},"PeriodicalIF":7.4,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331089","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}
Corrosion SciencePub Date : 2025-06-18DOI: 10.1016/j.corsci.2025.113128
Ankit Kumar, Amey Luktuke, Hamidreza Torbati-Sarraf, Daniel R. Sinclair, Nikhilesh Chawla
{"title":"Investigation of mechanical properties of corrosion products in AA7075-T651 using in situ nanoindentation","authors":"Ankit Kumar, Amey Luktuke, Hamidreza Torbati-Sarraf, Daniel R. Sinclair, Nikhilesh Chawla","doi":"10.1016/j.corsci.2025.113128","DOIUrl":"10.1016/j.corsci.2025.113128","url":null,"abstract":"<div><div>Aluminum alloys benefit from the formation of a passivating layer for protection against atmospheric corrosion. However, mechanical damage to this layer can expose the underlying material, initiating localized corrosion and compromising structural integrity. Despite its critical role, the evolution of the mechanical properties of the corrosion product layer under dynamic environmental conditions remains poorly understood. This study investigates the microstructural and micromechanical behavior of the corrosion product layer formed in an AA7075-T651 alloy in an aqueous chloride solution. <em>In situ</em> nanoindentation experiments were performed to measure mechanical properties, while chemical composition and phase evolution were analyzed using electron microscopy and Raman spectroscopy. The results reveal that prolonged immersion leads to a reduction in the Young’s modulus and hardness of the corrosion layer attributed to chloride ion infiltration in the oxide layer inducing microporosity. Furthermore, transitioning the corrosion layer from an aqueous to a dry atmospheric environment induces microcracking due to dehydration and the loss of crystallinity in the AlOOH phase. This transition may also involve a phase transformation from AlOOH to Al(OH)₃, attributed to structural changes within the corrosion products, reducing their mechanical integrity. These findings provide critical insights into the degradation mechanisms of aluminum alloys corrosion layer in chloride-rich environments, supporting the development of advanced materials and coatings with enhanced mechanical and corrosion resistance.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"255 ","pages":"Article 113128"},"PeriodicalIF":7.4,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312551","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}
Corrosion SciencePub Date : 2025-06-18DOI: 10.1016/j.corsci.2025.113127
Tianqi Chen , Fansong Wu , Qing Li , Guowei Yang , Yongfeng Chen , Chao Liu , Xuequn Cheng , Xiaogang Li
{"title":"Comparative study on corrosion resistance of carbon steel and ductile iron: Implications for the development of corrosion-resistant steels","authors":"Tianqi Chen , Fansong Wu , Qing Li , Guowei Yang , Yongfeng Chen , Chao Liu , Xuequn Cheng , Xiaogang Li","doi":"10.1016/j.corsci.2025.113127","DOIUrl":"10.1016/j.corsci.2025.113127","url":null,"abstract":"<div><div>This study provides a comparative investigation of the corrosion resistance of Q235 carbon steel and ductile iron (DI) by integrating long-term field corrosion monitoring with accelerated laboratory testing. Real-time, on-site monitoring revealed that DI consistently exhibits lower corrosion current density, highlighting its superior corrosion resistance. In 14-day dry/wet cyclic corrosion tests, DI exhibited a significantly lower corrosion rate (1.3 mm/year) than Q235 (2.8 mm/year). Results demonstrated that DI forms a denser inner rust layer, enriched with α-FeOOH, impeding Cl⁻ penetration. In contrast, Q235's rust layer is porous and cracked. Although both materials develop a dual-layer rust structure composed of Fe₃O₄, γ-FeOOH, and α-FeOOH, the higher α/γ* ratio and low-frequency impedance of DI (|Z|<sub>0.01 Hz</sub> increasing from 252 Ω·cm² to 797 Ω·cm² compared to Q235 steel) underscore its superior long-term performance. Mechanistic studies indicate that the uniformly distributed spherical graphite promote uniform dissolution through a \"large anode-small cathode\" effect while catalyzing the transformation of Fe²⁺ to Fe³ ⁺, thereby stabilizing α-FeOOH formation. This work provides important insights for developing novel cost-effective corrosion-resistant steels, demonstrating that optimized microstructural design and rust layer densification strategies can enhance corrosion resistance without relying on expensive alloying elements.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"255 ","pages":"Article 113127"},"PeriodicalIF":7.4,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312553","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}
Corrosion SciencePub Date : 2025-06-18DOI: 10.1016/j.corsci.2025.113112
Shuang Yu , Shuqi Wang , Yaming Wang , Zhiyun Ye , Qiang Zhao , Yang Li , Dawei Ren , Guoliang Chen , Yongchun Zou , Jiahu Ouyang , Dechang Jia , Yu Zhou
{"title":"Growth behavior and barrier mechanism of corrosion product layer from calcium-magnesium-aluminosilicate on Yb2Si2O7-Yb2SiO5 composite environmental barrier coatings at 1300 ℃","authors":"Shuang Yu , Shuqi Wang , Yaming Wang , Zhiyun Ye , Qiang Zhao , Yang Li , Dawei Ren , Guoliang Chen , Yongchun Zou , Jiahu Ouyang , Dechang Jia , Yu Zhou","doi":"10.1016/j.corsci.2025.113112","DOIUrl":"10.1016/j.corsci.2025.113112","url":null,"abstract":"<div><div>The corrosion mechanism of Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>-Yb<sub>2</sub>SiO<sub>5</sub> composite environmental barrier coatings (EBCs) with various mass ratios under calcium-magnesium-aluminosilicate (CMAS) attack at 1300 ℃ for 100 h was investigated. The predominant products of the 75Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>-25Yb<sub>2</sub>SiO<sub>5</sub> (with a dense layer thickness of 15.83 ± 1.79 μm) and 50Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>-50Yb<sub>2</sub>SiO<sub>5</sub> (with a dense layer thickness of 11.61 ± 1.19 μm) EBCs are apatites with dense bottom structures. In addition to apatite, a garnet layer is produced on the 25Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>-75Yb<sub>2</sub>SiO<sub>5</sub> EBC surface due to the high Al:Si ratio in the CMAS melt. The dense corrosion product layer (∼35.37 ± 4.75 μm) on the 25Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>-75Yb<sub>2</sub>SiO<sub>5</sub> EBC obviously hindered the infiltration of the CMAS melt, showing superior CMAS corrosion resistance.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"255 ","pages":"Article 113112"},"PeriodicalIF":7.4,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144335832","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}
Corrosion SciencePub Date : 2025-06-18DOI: 10.1016/j.corsci.2025.113124
Wenkang Long , Yinghao Zhou , Yuankui Cao , Li Wang , Ao Fu , Tao Yang , ZhiYu Sun , Xiaofei Mo , Hai Nan , Bin Liu , Yong Liu
{"title":"Revealing the origin of the exceptional elevated-temperature oxidation resistance of an L12-strengthened NiCoCrFe-based high-entropy alloy","authors":"Wenkang Long , Yinghao Zhou , Yuankui Cao , Li Wang , Ao Fu , Tao Yang , ZhiYu Sun , Xiaofei Mo , Hai Nan , Bin Liu , Yong Liu","doi":"10.1016/j.corsci.2025.113124","DOIUrl":"10.1016/j.corsci.2025.113124","url":null,"abstract":"<div><div>Nanoparticle-strengthened high-entropy alloys (HEAs) are currently served as potential high-temperature materials for modern industrial applications. In this work, the oxidation behavior of an L1<sub>2</sub>-strengthened HEA with superior mechanical properties in elevated temperatures was systematically investigated by isothermal oxidation tests at 700, 800 and 900 °C in air. The results reveal that this alloy exhibits exceptional oxidation resistance at 700–900 °C, compared to typical nickel-based and high-entropy alloys. At 700 ℃, continuous Cr<sub>2</sub>O<sub>3</sub> is the key to the oxidation resistance. More complex hierarchical oxide scales formed at 800 and 900 °C, primarily consisted of the TiO<sub>2</sub>, spinel, Cr<sub>2</sub>O<sub>3</sub> and Al<sub>2</sub>O<sub>3</sub>. The synergy of Cr<sub>2</sub>O<sub>3</sub> and Al<sub>2</sub>O<sub>3</sub> oxide scale at 800 °C ensure the oxidation resistance, but the spinel oxide scales formed lead to the spallation of the outermost oxide film and the internal oxidation. After oxidation at 900 ℃, the formation of spinel and TiO<sub>2</sub> oxide layer can effectively reduce the evaporation of Cr<sub>2</sub>O<sub>3</sub> oxide layer. Furthermore, the blocking effect of TiTaO<sub>4</sub> layer on Al ions and the high diffusion rate of Al element resulting in the formation of a continuous and dense Al<sub>2</sub>O<sub>3</sub> oxide layer, playing a key role in the oxidation resistance at 900 ℃.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"255 ","pages":"Article 113124"},"PeriodicalIF":7.4,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321289","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}
Corrosion SciencePub Date : 2025-06-17DOI: 10.1016/j.corsci.2025.113118
Youzhi Wang , Shuzhen Qiao , Jingli Xie , Yingmin Wang , Long Hao , Jianqiu Wang , Wei Ke
{"title":"DRT analysis on EIS data to identify aerobic-anaerobic corrosion evolution of low-carbon steel under deep geological disposal condition","authors":"Youzhi Wang , Shuzhen Qiao , Jingli Xie , Yingmin Wang , Long Hao , Jianqiu Wang , Wei Ke","doi":"10.1016/j.corsci.2025.113118","DOIUrl":"10.1016/j.corsci.2025.113118","url":null,"abstract":"<div><div>The aerobic-anaerobic corrosion transition of low-carbon steel under deep geological disposal conditions is critical in corrosion evaluation of disposal containers. In this work, the corrosion evolution behavior of Q345R low-carbon steel in Beishan underground water under sealed conditions has been investigated by electrochemical impedance spectroscopy (EIS), and besides the redox potential (Eh) evolution of the corrosion electrolyte has been recorded. The results indicate that the distribution of relaxation time (DRT) analysis on EIS data can well identify the oxygen reduction reaction (ORR)-related time-constant evolution. Therefore, it could be proposed that DRT analysis on EIS data combined with Eh monitoring is applicable for the aerobic-anaerobic corrosion transition investigation of low-carbon steel under electrolyte corrosion conditions.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"255 ","pages":"Article 113118"},"PeriodicalIF":7.4,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331119","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}
Corrosion SciencePub Date : 2025-06-17DOI: 10.1016/j.corsci.2025.113120
Jianwen Jia , Lifeng Hou , Hong Luo , Shucai Zhang , Hongxia Wang , Huayun Du , Yide Wang , Yinghui Wei
{"title":"Uncovering the influence of Mo and N on the hot-corrosion resistance of super austenitic stainless steels in a chloride-containing oxidizing environment","authors":"Jianwen Jia , Lifeng Hou , Hong Luo , Shucai Zhang , Hongxia Wang , Huayun Du , Yide Wang , Yinghui Wei","doi":"10.1016/j.corsci.2025.113120","DOIUrl":"10.1016/j.corsci.2025.113120","url":null,"abstract":"<div><div>The corrosion behavior of two super austenitic stainless steels (SASSs) 4Mo0.06 N and 6Mo0.18 N at 800 ℃ in a chloride-containing oxidizing environment was meticulously examined. The results indicated that higher Mo and N contents in 6Mo0.18 N facilitate the formation of Laves, σ phase and Cr<sub>2</sub>N, concomitantly, the volatile Mo-oxides weaken the protectiveness of oxides scales and enhance the diffusion of chlorine, thereby exacerbating corrosion. Here, we elucidate that the addition of more Mo and N results in an increase of secondary phase particles in 6Mo0.18 N as well as chlorine-induced grain boundaries deterioration, causing an obvious internal corrosion. Instead, the distinctly enhanced corrosion resistance in 4Mo0.06 N is attributed to the formation of continuous Ni-Mo rich metallic phases at the oxide/matrix interfaces so as to reduce the diffusion of ions, which effectively diminishes the inner corrosion. These findings provide a great guiding significance in optimizing high-performance alloy designs for their potential applications.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"255 ","pages":"Article 113120"},"PeriodicalIF":7.4,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306426","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}
Corrosion SciencePub Date : 2025-06-16DOI: 10.1016/j.corsci.2025.113115
Fangqiang Ning , Libo Zhang , Hong Yan , Hui Wang , Jia Liu , Ping Deng
{"title":"Corrosion behavior of FeNiCrAl duplex alloys with different C concentrations in borated and lithiated high-temperature water","authors":"Fangqiang Ning , Libo Zhang , Hong Yan , Hui Wang , Jia Liu , Ping Deng","doi":"10.1016/j.corsci.2025.113115","DOIUrl":"10.1016/j.corsci.2025.113115","url":null,"abstract":"<div><div>Corrosion behavior of FeNiCrAl duplex alloys in borated and lithiated high-temperature water and the effect of C addition on its corrosion behavior were investigated. The Cr-rich inner oxide film (Cr<sub>2</sub>O<sub>3</sub>+FeCr<sub>2</sub>O<sub>4</sub>) on α phase with 22.5 wt% Cr content exhibited superior protective properties compared to the Cr-rich spinel oxide film (FeCr<sub>2</sub>O<sub>4</sub>) on γ phase with 15.2 wt% Cr content, thereby resulting in a thinner inner oxide film on α phase than that on γ phase. The precipitation of amounts of Al<sup>3</sup><sup>+</sup> dissolved from B2-NiAl phase led to the formation of numerous outer oxide particles enriched in Al on α and γ phases. The C addition increased the Cr content of α and γ phase, and enhanced the protective properties of the inner oxide film on γ phase by increasing its Cr content, while had little effect on the composition and protective properties of the inner oxide film on α phase. The corrosion mechanism of FeNiCrAl duplex alloys and the effect mechanism of C addition is also discussed.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"255 ","pages":"Article 113115"},"PeriodicalIF":7.4,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306425","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}