Effect of Ni as a minority alloying element on the corrosion behavior in Al–Cu–Mg–(Ni) metallic glasses

Aburada, T.; Ünlü, Necip; Fitzgerald, James W.; Shiflet, G. J.; Scully, John R.

doi:10.1016/j.scriptamat.2007.11.041

Cited by 26 publications

(14 citation statements)

References 16 publications

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“…Thus, by controlling the microstructure through crystallization, the mechanical properties of the amorphous alloys can be improved. On the other hand, the crystallization may have a significant influence on the corrosion behavior of the Al-based amorphous alloys [20][21][22][23]. It has been found that partial crystallization may improve or deteriorate the corrosion resistance of the amorphous alloys, which is dependent on the composition, the crystallization extent, the crystallization products, etc.…”

Section: Introductionmentioning

confidence: 99%

Crystallization and corrosion resistance of as-spun (Al86Ni9La5)98Zr2 amorphous alloy

Lin

Wang

et al. 2009

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Crystallization and corrosion resistance of as-spun (Al86Ni9La5)98Zr2 amorphous alloy

Lin

Wang

et al. 2009

Journal of Alloys and Compounds

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“…3), even in comparison to Al 2 Cu (h phase) a solid solution containing 33 atom % Cu and no Mg. 32 Given the amorphous structure of the Al-Cu-Mg-based alloys, it is possible to isolate the effect of the minor solute addition from the effect of chemical and structural heterogeneity on corrosion behavior. 3), even in comparison to Al 2 Cu (h phase) a solid solution containing 33 atom % Cu and no Mg. 32 Given the amorphous structure of the Al-Cu-Mg-based alloys, it is possible to isolate the effect of the minor solute addition from the effect of chemical and structural heterogeneity on corrosion behavior.…”

Section: Discussionmentioning

confidence: 99%

“…32,33 The synthesis of nanoporous Cu via dealloying of the same alloy systems has also been reported. 32,33 The synthesis of nanoporous Cu via dealloying of the same alloy systems has also been reported.…”

mentioning

confidence: 98%

“…Previous reports by the authors regarding the corrosion behavior of these amorphous alloys disclosed the enhanced corrosion resistance due to the addition of Ni as a minor solute element. 32,33 The synthesis of nanoporous Cu via dealloying of the same alloy systems has also been reported. 34 However, the roles of such minor alloying element in corrosion have not yet been elucidated.…”

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confidence: 98%

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Pitting and Dealloying of Solute-Rich Al-Cu-Mg-based Amorphous Alloys: Effect of Alloying with Minor Concentrations of Nickel

Aburada

Fitzgerald

Scully

2011

J. Electrochem. Soc.

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The effect of Ni as a minor alloying element on the anodic dissolution behavior of solute rich Al-Cu-Mg-based amorphous alloys ((Al 75 Cu 17 Mg 8 ) 97 Ni 3 and Al 70 Cu 18 Mg 12 ) was studied. A small addition of Ni enhances both the pitting potential in 0.6 M NaCl, and resistance to dealloying 1 M HCl, and 5 M HCl þ 5 M LiCl solutions. A crystalline, Cu-rich nanoporous structure forms in pits as a result of selective dissolution of Al and Mg in both alloys, with the finest structure present in the Ni containing alloy. The increase in potential drop during pit stabilization due to the greater Ohmic resistance through the finer porous layer is one of the reasons that the pitting potential is ennobled. Ni in solid solution also hinders anodic dissolution in artificial pits which is speculatively linked to an increase the energy barrier for the dissolution of Al around Ni by forming stronger bonds. The Ni alloying also reduces the probability of finding Al-Al bonds. These result in a reduction in the dissolution kinetics which in turn ennobles the pit stabilization potential. Technological implications for corrosion resistant conventional Al-Cu-Mg alloy design and alternatively a new route to the creation of nanoporous Cu are discussed.

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“…The first evidence on the high corrosion resistance of metallic glasses from the Fe-Cr system was reported in 1974 [1]. Since then, a lot of studies have been published on the corrosion behavior of amorphous alloys based on Fe [2, 3], Zr [4,5], Al [6,7]. The important role of the chemical composition in the corrosion behavior of metallic glasses is well known [9], while the role of the amorphous structure is not yet well understood.…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF MINORITY ALLOYING ELEMENTS Zn AND Zr ON THE CORROSION BEHAVIOR OF AMORPHOUS ALLOYS АLCUMG(Zn) AND ALCUMG(Zr) AND THEIR NANOCRYSTALLINE ANALOGUES

2022

IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TE

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Быстро затвердевшие ленты на основе сплава Al74Cu16Mg10 были получены методом спиннингования. Для получения кристаллической структуры быстрозатвердевшие ленты отжигали в атмосфере аргона. Аморфная и нанокристаллическая структура подтверждена анализами XRD и TЕM. Исследовано влияние легирующих элементов Zn и Zr на коррозионное поведение быстрозатвердевшего сплава Al74Cu16Mg10 в аморфных и нанокристаллических аналогах. Проведены гравиметрические испытания на общую коррозию при 25 °С и 50 °С в среде 3,5% NaCl. При 25 °С скорость коррозии аморфных сплавов оказалась в 1,5-4 раза ниже скорости коррозии их кристаллических аналогов. Влияние трансформации аморфной структуры в нанокристаллическую на скорость коррозии при 50 °С отрицательно и наиболее существенно в Zn-содержащем сплаве. Проведены электрохимические испытания на общую и локальную коррозию в среде 3,5% NaCl и объяснен гальванический механизм локальной коррозии в сплавах. Основной причиной регистрируемой повышенной локальной коррозии кристаллических сплавов является химическая и структурная неоднородность, связанная с наличием в алюминиевой матрице активных интерметаллических фаз Al2CuMg, Al2 (Cu, Zn), Al3Zr4. Обсуждается влияние неровности поверхности, структуры слоя продуктов коррозии, отложенного на поверхность металла, и отжига для трансформации аморфной структуры на коррозионное поведение сплавов.

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Effect of Ni as a minority alloying element on the corrosion behavior in Al–Cu–Mg–(Ni) metallic glasses

Cited by 26 publications

References 16 publications

Crystallization and corrosion resistance of as-spun (Al86Ni9La5)98Zr2 amorphous alloy

Crystallization and corrosion resistance of as-spun (Al86Ni9La5)98Zr2 amorphous alloy

Pitting and Dealloying of Solute-Rich Al-Cu-Mg-based Amorphous Alloys: Effect of Alloying with Minor Concentrations of Nickel

EFFECT OF MINORITY ALLOYING ELEMENTS Zn AND Zr ON THE CORROSION BEHAVIOR OF AMORPHOUS ALLOYS АLCUMG(Zn) AND ALCUMG(Zr) AND THEIR NANOCRYSTALLINE ANALOGUES

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