Corrosion resistance of crystalline and amorphous CuZr alloys in NaCl aqueous environment and effect of corrosion inhibitors

JOURNAL OF ALLOYS AND COMPOUNDS

卷:879

Article

Xie, Chenyang^1,2,3,4  Milosev, Ingrid⁵  Renner, Frank U.^3,4  Kokalj, Anton⁵  Bruna, Pere^1,2  Crespo, Daniel^1,2 

[1] Univ Politecn Cataluna, Dept Phys, INTE, Barcelona, Catalunya, Spain

[2] Univ Politecn Cataluna, Barcelona Multiscale Res Ctr, Barcelona, Catalunya, Spain

[3] Hasselt Univ, Inst Mat Res IMO, Diepenbeek, Belgium

[4] Hasselt Univ, IMOMEC, Diepenbeek, Belgium

[5] Jozef Stefan Inst, Dept Phys & Organ Chem, Ljubljana, Slovenia

关键词: CuZr;    Crystalline alloys;    Amorphous alloys;    Corrosion inhibition;    Imidazole-based inhibitors;   

DOI  :  10.1016/j.jallcom.2021.160464

来源: Elsevier

【 摘 要 】

CuZr alloys are the basis of a family of metallic glasses with large glass forming ability and remarkable mechanical properties. The corrosion response of prepared crystalline and amorphous CuxZr100-x alloys (x = 40, 50, 64 at%), as well as bare Cu and Zr, in a severe corrosive environment, was tested. The alloys were immersed in 3 wt% NaCl aqueous solution. With the aim to increase the resistance of copper as less corrosion alloy component, nine imidazole-based compounds with different functional groups were tested as potential corrosion inhibitors. Potentiodynamic polarization measurements, electrochemical impedance spectroscopy, and long-term immersion tests followed by X-ray photoelectron spectroscopy and microscopy analysis were carried out. Overall, all the tested amorphous alloys exhibit a much better corrosion resistance than their crystalline counterparts in the presence and absence of inhibitors. The main factor controlling the corrosion resistance of the alloys appears to be the Zr-rich (or at least equiatomic) amorphous structure, the effect of the inhibitors being secondary. Results therefore show a complex relationship between inhibitor performance, microstructure and composition of CuZr alloys. (C) 2021 The Author(s). Published by Elsevier B.V.

【 授权许可】

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