Corrosion Behavior of the AlCoCrFeNi2.1 Eutectic High-Entropy Alloy in Chloride-Containing Sulfuric Acid Solutions at Different Temperatures

In this work, the influence of temperature on the corrosion behavior of AlCoCrFeNi2.1 eutectic high-entropy alloy in a chloride-containing sulfuric acid solution was investigated using electrochemical measurement, X-ray photoelectron spectroscopy, and scanning electron microscopy. Results show that the passive film of AlCoCrFeNi2.1 is stable in chloride-containing sulfuric acid solutions at low temperatures, while an unstable film forms on the alloy at high temperatures. Furthermore, temperature changes the proportion of hydroxide and oxide in Fe and Cr, but it has no noticeable effect on Al and Ni, which is a significant factor on the passive behavior. L12 phase exhibits good corrosion resistance at different temperatures. Pitting occurred on B2 phase in the chloride-containing sulfuric acid solution at a low temperature of 5 °C, while pitting and dissolution take place on AlCoCrFeNi2.1 in the acid solution at room temperature and above.

[1]  D. Wan,et al.  Hydrogen embrittlement of additively manufactured AlCoCrFeNi2.1 eutectic high-entropy alloy , 2022, Corrosion Science.

[2]  Weidong Song,et al.  Dynamic mechanical properties and microstructure evolution of AlCoCrFeNi2.1 eutectic high-entropy alloy at different temperatures , 2022, Journal of Alloys and Compounds.

[3]  G. Le,et al.  Simultaneously enhanced strength-ductility of AlCoCrFeNi2.1 eutectic high-entropy alloy via additive manufacturing , 2022, Materials Science and Engineering: A.

[4]  H. Fu,et al.  Unique strength-ductility balance of AlCoCrFeNi2.1 eutectic high entropy alloy with ultra-fine duplex microstructure prepared by selective laser melting , 2021, Journal of Materials Science & Technology.

[5]  P. Peng,et al.  Phase selection and mechanical properties of directionally solidified AlCoCrFeNi2.1 eutectic high-entropy alloy , 2021, Journal of Alloys and Compounds.

[6]  Ke Wang,et al.  Passivation kinetics of a high nitrogen face-centered-cubic phase formed on AISI 304L austenitic stainless steel in borate buffer solutions by photo- and electrochemical methods , 2021 .

[7]  Tongmin Wang,et al.  Surface modification for AlCoCrFeNi2.1 eutectic high-entropy alloy via laser remelting technology and subsequent aging heat treatment , 2021, Journal of Alloys and Compounds.

[8]  M. Rezaei,et al.  Electrochemical studies and molecular simulations on the use of molybdic acid for stabilization of AISI 304 stainless steel passive film in sulfuric acid medium , 2021, Journal of Molecular Liquids.

[9]  I. Muto,et al.  Pitting at inclusions of the equiatomic CoCrFeMnNi alloy and improving corrosion resistance by potentiodynamic polarization in H2SO4 , 2021 .

[10]  Xiaogang Li,et al.  The corrosion behavior and film properties of Al-containing high-entropy alloys in acidic solutions , 2021 .

[11]  Yiming Jiang,et al.  A comparative study on the critical pitting criteria of a super ferritic stainless steel at different temperatures in chloride or bromide solution , 2021 .

[12]  Xiaojie Du,et al.  Corrosion resistance enhancement of CoCrFeMnNi high-entropy alloy fabricated by additive manufacturing , 2020 .

[13]  Xianlong Cao,et al.  Effect of temperature on the electrochemical pitting corrosion behavior of 316L stainless steel in chloride-containing MDEA solution , 2020 .

[14]  Zheli Feng,et al.  Pseudo-passivation mechanism of CoCrFeNiMo0.01 high-entropy alloy in H2S-containing acid solutions , 2020 .

[15]  P. Liaw,et al.  Promising properties and future trend of eutectic high entropy alloys , 2020, Scripta Materialia.

[16]  W. Xu,et al.  Unanticipated drastic decline in pitting corrosion resistance of additively manufactured 316L stainless steel after high-temperature post-processing , 2020 .

[17]  Xiaogang Li,et al.  Influence of carbon on the corrosion behaviour of interstitial equiatomic CoCrFeMnNi high-entropy alloys in a chlorinated concrete solution , 2020 .

[18]  Ye Pan,et al.  Corrosion behaviors of FeCoNiCr (x = 0, 0.5, 1.0) multi-principal element alloys: Role of Cr-induced segregation , 2020 .

[19]  Xingpeng Guo,et al.  Carbon dots as effective corrosion inhibitor for 5052 aluminium alloy in 0.1 M HCl solution , 2019 .

[20]  Ricardo M. Souto,et al.  Pitting corrosion inhibition of 304 stainless steel in NaCl solution by three newly synthesized carboxylic Schiff bases , 2019, Corrosion Science.

[21]  C. Dong,et al.  Determining the electric-field strength in a passive film via photo-induced electric fields , 2019, Corrosion Science.

[22]  Y. F. Cheng,et al.  Passivation behavior and surface chemistry of 2507 super duplex stainless steel in artificial seawater: Influence of dissolved oxygen and pH , 2019, Corrosion Science.

[23]  C. Dong,et al.  Passive film on 2205 duplex stainless steel studied by photo-electrochemistry and ARXPS methods , 2019, Corrosion Science.

[24]  Gang Sha,et al.  High-content ductile coherent nanoprecipitates achieve ultrastrong high-entropy alloys , 2018, Nature Communications.

[25]  B. Zhang,et al.  Microstructural origins of high strength and high ductility in an AlCoCrFeNi2.1 eutectic high-entropy alloy , 2017 .

[26]  Karin A. Dahmen,et al.  Corrosion of Al xCoCrFeNi high-entropy alloys: Al-content and potential scan-rate dependent pitting behavior , 2017 .

[27]  C. Man,et al.  Influence of temperature on the electrochemical and passivation behavior of 2507 super duplex stainless steel in simulated desulfurized flue gas condensates , 2017 .

[28]  Sheng Guo,et al.  Directly cast bulk eutectic and near-eutectic high entropy alloys with balanced strength and ductility in a wide temperature range , 2017 .

[29]  Douglas L. Irving,et al.  A Novel Low-Density, High-Hardness, High-entropy Alloy with Close-packed Single-phase Nanocrystalline Structures , 2015 .

[30]  L. Vitos,et al.  Empirical design of single phase high-entropy alloys with high hardness , 2015 .

[31]  Tao Zhang,et al.  Effect of pitting nucleation on critical pitting temperature of 316L stainless steel by nitric acid passivation , 2015 .

[32]  Huijun Kang,et al.  A Promising New Class of High-Temperature Alloys: Eutectic High-Entropy Alloys , 2014, Scientific Reports.

[33]  R. Akid,et al.  Effect of temperature on passive film formation of UNS N08031 Cr–Ni alloy in phosphoric acid contaminated with different aggressive anions , 2013 .

[34]  P. Marcus,et al.  Passivity of Metals and Alloys , 2013 .

[35]  Swe-Kai Chen.  Electrochemical Passive Properties of AlxCoCrFeNi (x = 0, 0.25, 0.50, 1.00) High-Entropy Alloys in Sulfuric Acids , 2012 .

[36]  H. Tsai,et al.  Evolution of microstructure, hardness, and corrosion properties of high-entropy Al0.5CoCrFeNi alloy , 2011 .

[37]  Digby D. Macdonald,et al.  The history of the Point Defect Model for the passive state: A brief review of film growth aspects , 2011 .

[38]  E. Han,et al.  Electrochemical properties and growth mechanism of passive films on Alloy 690 in high-temperature alkaline environments , 2010 .

[39]  Y. C. Wang,et al.  Pitting corrosion of the high-entropy alloy Co1.5CrFeNi1.5Ti0.5Mo0.1 in chloride-containing sulphate solutions , 2010 .

[40]  Swe-Kai Chen,et al.  Electrochemical passive properties of AlxCoCrFeNi (x = 0, 0.25, 0.50, 1.00) alloys in sulfuric acids , 2010 .

[41]  W. Ke,et al.  Electrochemical behaviour of high nitrogen stainless steel in acidic solutions , 2009 .

[42]  M. Jenko,et al.  Electrochemical and XPS studies of the passive film formed on stainless steels in borate buffer and chloride solutions , 2007 .

[43]  J. Yeh,et al.  Microstructure and electrochemical properties of high entropy alloys—a comparison with type-304 stainless steel , 2005 .

[44]  B. Cantor,et al.  Microstructural development in equiatomic multicomponent alloys , 2004 .

[45]  M. Amin,et al.  Corrosion inhibition study of pure Al and some of its alloys in 1.0 M HCl solution by impedance technique , 2004 .

[46]  D. Landolt,et al.  Passive films on stainless steels—chemistry, structure and growth , 2003 .