Corrosion Science最新文献_第9页

Effect of ageing temperature on the microstructure and localised corrosion of 15–5PH stainless steel

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-02-18 DOI: 10.1016/j.corsci.2025.112800

Alyshia Keogh , Emily Aradi , Mark Taylor , Anthony Cook , Ed Pickering , Zacharie Obadia , Philip Prangnell , Fabio Scenini

{"title":"Effect of ageing temperature on the microstructure and localised corrosion of 15–5PH stainless steel","authors":"Alyshia Keogh , Emily Aradi , Mark Taylor , Anthony Cook , Ed Pickering , Zacharie Obadia , Philip Prangnell , Fabio Scenini","doi":"10.1016/j.corsci.2025.112800","DOIUrl":"10.1016/j.corsci.2025.112800","url":null,"abstract":"<div><div>The effect of microstructure on the localised corrosion resistance of 15–5PH stainless steel was investigated as a function of ageing temperature (450°C, 540°C and 650°C). Microstructural characterisation revealed an increase in reverted austenite content for samples aged at 650°C. Cu precipitates increased in size with ageing temperature. Cr carbides were observed in samples aged at 540°C, and in samples aged at 650°C with a greater size and number density. Potentiodynamic Polarisation (PDP) and Double-Loop Electrochemical Potentiokinetic Reactivation (DL-EPR) were used to determine the Pitting Potential (E<sub>pit</sub>) and the Degree Of Reactivation (DOR) at each ageing temperature, respectively. The scatter in the measured E<sub>pit</sub> values was too large to confidently rank pitting susceptibility as a function of ageing temperature. However, it was found that the DOR increased with ageing temperature; this increase correlated with an increase in density of Cr carbides in the microstructure at an ageing temperatures of 540°C and the formation of reverted austenite at 650 °C. These heat treatment induced changes resulted in the distribution of Cr in the microstructure becoming less homogeneous as the ageing temperature increased, leading to a likely increase in the number of susceptible sites for localised corrosion by disruption of the integrity of the passive film.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"248 ","pages":"Article 112800"},"PeriodicalIF":7.4,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464010","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

Mechanism of zinc phosphate conversion coating formation on iron-based substrates

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-02-18 DOI: 10.1016/j.corsci.2025.112796

Mohammad Alinezhadfar , Patrik Schmutz , Fabio E. Furcas , Joakim Reuteler , Rowena Crockett , Ueli Angst

{"title":"Mechanism of zinc phosphate conversion coating formation on iron-based substrates","authors":"Mohammad Alinezhadfar , Patrik Schmutz , Fabio E. Furcas , Joakim Reuteler , Rowena Crockett , Ueli Angst","doi":"10.1016/j.corsci.2025.112796","DOIUrl":"10.1016/j.corsci.2025.112796","url":null,"abstract":"<div><div>This study investigates the formation mechanism of zinc phosphate conversion coatings on pearlitic steel and ferritic iron with emphasis on the impact of microstructure and substrate corrosion. Deposition parameters, including pH (2 and 2.5) and temperature (50°C and 70°C), were explored. Open circuit potential (OCP) monitoring was used to identify different stages of coating formation. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) showed that higher temperatures accelerated the growth of phosphate crystals, composed of hopeite (Zn<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>) and phosphophyllite (Zn<sub>2</sub>Fe(PO<sub>4</sub>)<sub>2</sub>) on both substrates. Deposition at pH 2.5 led to bulk-solution precipitation on substrates, while at pH 2, coatings were growing from the substrate surface. Electrochemical impedance (EIS) and inductively coupled plasma mass spectrometry (ICP-MS) measurements revealed that iron corroded around 2.5 times slower than steel. As identified by energy dispersive X-ray spectroscopy (EDS) in SEM, iron phosphate particles were formed on both substrates. These particles accumulated in higher amounts on steel, while iron exhibited minimal corrosion product accumulation. Different phosphating stages were then studied using SEM and time-of-flight – secondary ion mass spectrometry (ToF-SIMS). ToF-SIMS depth profiles highlighted a thicker iron phosphate layer on steel at early phosphating stages, compared to iron. Focused ion beam (FIB) cross-sections of fully phosphated steel showed a porous interlayer, mainly composed of iron-phosphate, at the coating/steel interface. Zinc phosphate crystals were nucleated on this porous layer or formed by near-surface solution precipitation. Iron substrates did not show this porous interlayer, and had lower phosphatability with only near-surface solution precipitation of zinc phosphate crystals.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"248 ","pages":"Article 112796"},"PeriodicalIF":7.4,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464013","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

Dynamic response to fluctuating input of Nb:Ti:N film modified Ti bipolar plates for proton exchange membrane water electrolyser

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-02-18 DOI: 10.1016/j.corsci.2025.112803

Xiejing Luo , Luqi Chang , Chenhao Ren , Yingyu Ding , Jiuhong Zhang , Dawei Zhang , Jizheng Yao , Zhanfeng Deng , Chaofang Dong

{"title":"Dynamic response to fluctuating input of Nb:Ti:N film modified Ti bipolar plates for proton exchange membrane water electrolyser","authors":"Xiejing Luo , Luqi Chang , Chenhao Ren , Yingyu Ding , Jiuhong Zhang , Dawei Zhang , Jizheng Yao , Zhanfeng Deng , Chaofang Dong","doi":"10.1016/j.corsci.2025.112803","DOIUrl":"10.1016/j.corsci.2025.112803","url":null,"abstract":"<div><div>The potential application of renewable energy sources such as wind power and photovoltaics in hydrogen production from water electrolysis has driven the development of bipolar plates. Combined with theoretical conductivity calculations and electrode potential-pH diagram constructions, a novel Nb:Ti:N film for bipolar plates is innovatively designed with excellent electrical conductivity and corrosion resistance, as well as high thermal and chemical stability. The Nb and N elements improve the electronic delocalisation effect and transport capacity of Ti and TiO<sub>2</sub>, and the interfacial contact resistance of the Nb:Ti:N film modified Ti bipolar plates has been decreased to 3.27 mΩ cm<sup>2</sup> at 1.4 MPa, with an enhancement of electrical conductivity by about 86 %. At 0 < pH < 7, both Ti metal and Nb metal present good stability and the passivation zone is mainly in the form of TiO<sub>2</sub> and Nb<sub>2</sub>O<sub>5</sub>. At 1.8 V (vs. Ag/AgCl), the corrosion resistance of Nb metal is better and the Nb oxide formed by passivation of Nb metal prevents the dissolution of Ti substrate into TiO<sup>2+</sup> and (TiO<sub>2</sub>)<sup>2+</sup> ions. Moreover, periodic triangle and square wave polarization potentials have been applied to simulate wind and photovoltaic power input. By evaluating the durability and dynamic response characteristics of the bipolar plates under fluctuating voltage input conditions, it can be concluded that the high potential promotes the passivation behavior of Nb metal in Nb:Ti:N films, which results in a fast response to current fluctuations caused by fluctuating potentials.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"249 ","pages":"Article 112803"},"PeriodicalIF":7.4,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509162","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

Dynamic oxide film evolution and corrosion mechanisms of 308L stainless steel in simulated SMR environments

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-02-18 DOI: 10.1016/j.corsci.2025.112804

Pengfei Gao , Yanhui Li , Wang Zhu , Jie Qiu , Zhouyang Bai , Qibo Wang , Shaoming Ding

引用次数: 0

CMAS corrosion resistance and mechanism of directionally solidified Al2O3/YAG eutectic ceramics at high temperatures of 1300–1500 ℃

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-02-17 DOI: 10.1016/j.corsci.2025.112793

Xue Tan, Haijun Su, Yuan Liu, Jiatong Yao, Hongliang Gao, Hao Jiang, Minghui Yu, Xiang Li, Peixin Yang, Zhuo Zhang, Min Guo

引用次数: 0

Evaluating the importance of flavin-based electron shuttling in corrosion

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-02-14 DOI: 10.1016/j.corsci.2025.112782

Peiyu Ma , Di Wang , Dake Xu , Derek R. Lovley

引用次数: 0

Synergistic influence of L12 precipitates on the mechanical properties and corrosion resistance of CoCrFeNi2-based high entropy alloys

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-02-14 DOI: 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

引用次数: 0

Influence of homogenized annealing on the intergranular corrosion behavior of super ferritic stainless steel S44660

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-02-14 DOI: 10.1016/j.corsci.2025.112783

Bin Wang , Yugui Li , Huaying Li , Guanghui Zhao , Yaohui Song , Hui Xu

引用次数: 0

Theoretical and experimental study on the corrosion behavior of Zn1-xLaxO resistive switching film in 3.5 wt% NaCl solution

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-02-13 DOI: 10.1016/j.corsci.2025.112764

Fei Xue , Yutong Hou , Jihui Wang , Wenbin Hu , Feixiong Mao , Liping Wang

{"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}

引用次数: 0

Determination of kinetic parameters in the point defect model (PDM) for iron using electrochemical impedance spectroscopy and first-principles calculations

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2025-02-13 DOI: 10.1016/j.corsci.2025.112779

Dihao Chen , Chaofang Dong , George R. Engelhardt , Jie Qiu , Digby D. Macdonald

{"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}

引用次数: 0