Materials and Corrosion最新文献_第8页

Microstructure and corrosion resistance characteristics of Ti–AlN composite produced by selective laser melting 选择性激光熔化制备Ti-AlN复合材料的显微组织和耐腐蚀性能

Materials and Corrosion Pub Date : 2021-12-09 DOI: 10.1002/maco.202112703

Monika Chlewicka, A. Dobkowska, R. Sitek, B. Adamczyk‐Cieślak, J. Mizera

引用次数: 1

Inhibition of corrosion of API K55 steel by tannin from Acacia mearnsii bark in highly acidic medium 金合欢树皮单宁对API K55钢在强酸性介质中的缓蚀作用

Materials and Corrosion Pub Date : 2021-12-02 DOI: 10.1002/maco.202112744

K. G. Bacca, N. Lopes, E. M. Costa

{"title":"Inhibition of corrosion of API K55 steel by tannin from Acacia mearnsii bark in highly acidic medium","authors":"K. G. Bacca, N. Lopes, E. M. Costa","doi":"10.1002/maco.202112744","DOIUrl":"https://doi.org/10.1002/maco.202112744","url":null,"abstract":"The corrosion inhibiting effect of the tannin from Acacia mearnsii bark on API 5CT K55 steel, used for casing in the oil and gas industry, was investigated in 1 M HCl medium with different tannin concentrations. Corrosion was monitored by electrochemical tests using potentiodynamic polarization (PP) and electrochemical impedance spectroscopy (EIS). Complementary analyses of the corroded surfaces were performed by scanning electron microscopy (SEM), atomic force microscopy (AFM), and X‐ray diffraction (XRD). With the application of A. mearnsii tannin, the cathodic branch of the PP curves shifted to lower corrosion current density values. EIS analysis indicated that inhibitor molecules were adsorbed on the steel surface, which provided protection against corrosion. The SEM, AFM, and XRD data showed that in the presence of the inhibitor, a film and amorphous material were adsorbed on the steel surface, plausibly associated with the formation of tannates. The highest inhibition efficiency was obtained at an inhibitor concentration of 0.7 5 g L−1 (92% determined by PP and 98% by EIS), and a high degree of surface coverage was observed, compared with that obtained using the other concentrations of tannin.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"88 3","pages":"613 - 622"},"PeriodicalIF":0.0,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91452615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Nano‐silica/chitosan composite coatings on biodegradable magnesium alloys for enhanced corrosion resistance in simulated body fluid 纳米二氧化硅/壳聚糖复合涂层在可生物降解镁合金上增强了模拟体液中的耐腐蚀性

Materials and Corrosion Pub Date : 2021-12-01 DOI: 10.1002/maco.202112701

Yucong Ma, M. Talha, Qi Wang, Qiancheng Zhao, Zhonghui Li, Yuanhua Lin

{"title":"Nano‐silica/chitosan composite coatings on biodegradable magnesium alloys for enhanced corrosion resistance in simulated body fluid","authors":"Yucong Ma, M. Talha, Qi Wang, Qiancheng Zhao, Zhonghui Li, Yuanhua Lin","doi":"10.1002/maco.202112701","DOIUrl":"https://doi.org/10.1002/maco.202112701","url":null,"abstract":"Chitosan (CTS) coatings have been studied as a biocompatible coating on biodegradable magnesium (Mg) alloys to improve the corrosion resistance and bioactivity for medical implants. However, the loose structure of the CTS coating cannot provide ideal long‐time corrosion resistance in the physiological environment. In this study, a nano‐SiO2/CTS composite coating was applied on an Mg alloy substrate using the sol–gel method. The surface characteristics of the samples were examined by Fourier‐transform infrared analysis, X‐ray diffraction, scanning electron microscopy‐energy‐dispersive spectrometry, and contact angle measurements. The particle size and suitable dispersion of the SiO2 nanoparticles inside the composite coating were confirmed by transmission electron microscopy. Further, the corrosion protection behavior of the coatings was examined in a simulated body fluid using potentiodynamic polarization, electrochemical impedance spectroscopy, and scanning electrochemical microscopy analyses. Atomic force microscopy was used to determine the surface morphologies of the samples after the polarization test. The surface characteristics, electrochemical measurements, and immersion test revealed that the SiO2 nanoparticles effectively filled the voids of the CTS coating and significantly improved the corrosion resistance. The optimal concentration of nano‐SiO2 is 1.0 g/L.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"2 1","pages":"436 - 450"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86977733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Study on the microstructure and corrosion behavior of Mg–(4 − x)Gd–xY–2Zn (x = 0, 2, 4 wt%) alloy Mg -(4−x) Gd-xY-2Zn (x = 0,2,4 wt%)合金组织与腐蚀行为研究

Materials and Corrosion Pub Date : 2021-11-29 DOI: 10.1002/maco.202112753

Yunhao Wang, Zili Liu, Xiqin Liu, Huanjian Xie, Yong Shi, Fang Liu, Jian Li

引用次数: 1

Effect of Thyme extract as an ecofriendly inhibitor for corrosion of mild steel in acidic media 百里香提取物在酸性介质中作为环保型缓蚀剂对低碳钢的腐蚀效果

Materials and Corrosion Pub Date : 2021-11-19 DOI: 10.1002/maco.202112769

Z. Golshani, Hossein Cheraghi Moezabad, Mahnaz Amiri, G. Sajadi, R. Naghizade, S. Hosseini

{"title":"Effect of Thyme extract as an ecofriendly inhibitor for corrosion of mild steel in acidic media","authors":"Z. Golshani, Hossein Cheraghi Moezabad, Mahnaz Amiri, G. Sajadi, R. Naghizade, S. Hosseini","doi":"10.1002/maco.202112769","DOIUrl":"https://doi.org/10.1002/maco.202112769","url":null,"abstract":"Natural extracts have been widely used to protect metal materials from corrosion. Mild steel (MS) corrosion inhibition in 0.5 M sulfuric acid was investigated in the absence and presence of Thyme leaf extracts as an economical corrosion inhibitor. The effects of various concentrations and different temperatures on inhibitor efficacy were investigated. Using electrochemical impedance spectroscopy and polarization curves, the corrosion resistance of the alloy was also estimated. The polarization technique indicated that the Thyme extract is a mixed‐type inhibitor for MS in 0.5 M H2SO4. The obtained results revealed an excellent inhibition efficiency of 98% at 200 ppm of Thyme concentration. The thermodynamic parameters calculated, the effects of temperature, and the adsorption mechanism were also investigated, that suggested formation of monolayer inhibitor molecules (i.e. the Langmuir adsorption isotherm) on the metal surface. The ∆Gadso value calculated from the Langmuir adsorption isotherm plots for inhibitor indicated that it was adsorbed on the alloy surface via a physisorption mechanism. Additional studies on plant extracts as corrosion inhibitors on metals are needed to produce solutions for industrial purposes.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"149 1","pages":"460 - 469"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75748045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Enhancement of mechanical properties and corrosion resistance of Mg–2Zn–0.5Zr–1.5Dy (mass%) alloy by a combination of heat treatment and hot extrusion 热处理与热挤压相结合提高Mg-2Zn-0.5Zr-1.5Dy(质量%)合金的力学性能和耐腐蚀性

Materials and Corrosion Pub Date : 2021-11-08 DOI: 10.1002/maco.202112755

Huan Li, J. Wen, Ya Liu, Jun-guang He

{"title":"Enhancement of mechanical properties and corrosion resistance of Mg–2Zn–0.5Zr–1.5Dy (mass%) alloy by a combination of heat treatment and hot extrusion","authors":"Huan Li, J. Wen, Ya Liu, Jun-guang He","doi":"10.1002/maco.202112755","DOIUrl":"https://doi.org/10.1002/maco.202112755","url":null,"abstract":"To enhance the mechanical properties and poor corrosion resistance of magnesium alloy in vitro, the as‐cast Mg–2Zn–0.5Zr–1.5Dy (mass%) magnesium alloy was subjected to two types of extrusion treatment, one is hot extrusion (denoted as ET alloy), the other is heat treatment followed by hot extrusion (denoted as HE alloy). The microstructure, mechanical properties, and corrosion behaviors of these extruded alloys are assessed. The results show that the HE alloy has superior mechanical properties and a slower corrosion rate than the ET alloy. The yield strength and elongation of the HE alloy reach 287 ± 10 MPa and 17.6 ± 0.5%, respectively, and its corrosion rate is only 0.59 ± 0.16 mm year−1. After hot extrusion, microscale and nanoscale second‐phase exist in the extruded alloys, and the nanoscale second‐phase can improve their mechanical properties by second‐phase strengthening. However, the presence of microscale second phase can cause galvanic corrosion and result in poor corrosion resistance. The HE alloy has good properties due to it containing more nanoscale second‐phase and fewer microscale second‐phase.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"19 1","pages":"587 - 601"},"PeriodicalIF":0.0,"publicationDate":"2021-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86396303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Hydrogen‐assisted fatigue crack propagation behavior of equiatomic Co–Cr–Fe–Mn–Ni high‐entropy alloy 等原子Co-Cr-Fe-Mn-Ni高熵合金氢辅助疲劳裂纹扩展行为

Materials and Corrosion Pub Date : 2021-11-05 DOI: 10.1002/maco.202112866

H. Xiao, Q. Zeng, Lin Xia, Z. Fu, Shaowei Zhu

引用次数: 6

Corrosion inhibiting performance of novel imidazolium‐based ionic liquids as an efficient and green corrosion constraint for carbon steel in neutral chloride solution 新型咪唑基离子液体对碳钢在中性氯溶液中的高效绿色缓蚀性能研究

Materials and Corrosion Pub Date : 2021-11-03 DOI: 10.1002/maco.202112751

S. M. Shoja, M. Abdouss, A. M. Miran Beigi

{"title":"Corrosion inhibiting performance of novel imidazolium‐based ionic liquids as an efficient and green corrosion constraint for carbon steel in neutral chloride solution","authors":"S. M. Shoja, M. Abdouss, A. M. Miran Beigi","doi":"10.1002/maco.202112751","DOIUrl":"https://doi.org/10.1002/maco.202112751","url":null,"abstract":"Considering the ionic liquids (ILs) were classified as green inhibitors herein three ecofriendly imidazolium‐based ILs were employed in corrosion inhibition, where weight loss evaluations along with electrochemical methods, including potentiodynamic polarization test, electrochemical impedance spectroscopy, and cyclic voltammetry measurements were exploited to elucidate corrosion prevention performance of the considered agents. The results derived from the polarization studies attested to the fact that these ILs could effectively act as mixed‐type corrosion inhibitors. Moreover, the progress of surface reactions due to the corrosion process was studied through field emission scanning electron microscopy and atomic force microscopy. Also, UV/Vis spectroscopy corroborated chemical interaction among metal surfaces and ILs. Findings clarified that the chemisorption of the ILs onto carbon steel surface conforms to Langmuir adsorption isotherm. Finally, it was found that all proposed ILs could play an effective role in corrosion preventing, for which, the efficiencies in the range of 82%–92% were achieved by electrochemical impedance analyses for investigated ILs at 75 ppm.","PeriodicalId":18223,"journal":{"name":"Materials and Corrosion","volume":"27 1","pages":"623 - 640"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78466941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Isothermal oxidation behavior of W‐free Co–Ni–Al‐based superalloy at high temperature 无W Co-Ni-Al基高温合金高温等温氧化行为

Materials and Corrosion Pub Date : 2021-11-02 DOI: 10.1002/maco.202112789

Q. Gao, H. Shang, Q. Ma, Huijie Zhang, Hailian Zhang, Huijun Li, Ziyun Liu

引用次数: 3

Effect of anodic potential on the characteristics of passive films grown on a brass alloy in a soil environment 阳极电位对土壤环境下黄铜合金钝化膜特性的影响

Materials and Corrosion Pub Date : 2021-10-20 DOI: 10.1002/maco.202112795

Zhihao Liang, K. Jiang, Bai-ao Feng, Lin Li, Ting’an Zhang

引用次数: 0