| Autor: |
S. Choudhary, S. O'Brien, Y. Qiu, S. Thomas, R.K. Gupta, N. Birbilis |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Electrochemistry Communications, Vol 125, Iss , Pp 106989- (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1388-2481 |
| DOI: |
10.1016/j.elecom.2021.106989 |
| Popis: |
Recent exploration of multi-principal-element alloys (MPEAs), which include the so-called high-entropy alloys, has revealed hitherto unreported properties and phenomena arising from investigation of broader compositional space. Herein, a low cost and lightweight alloy (equiatomic AlFeMnSi) is presented that exhibits exceptional corrosion resistance in 0.6 M NaCl solution, despite a multiphase structure and the absence of well-known passivating elements (such as Cr, Mo, Ti and Nb). In-line inductively-coupled plasma mass spectroscopy (ICP-MS) analysis of alloy dissolution and angle-resolved X-ray photoelectron spectroscopy (AR-XPS) of the surface film revealed that the alloy passivates by a unique mechanism involving dissolution–precipitation of Si. The dynamic precipitation of a Si hydroxide surface film results in excellent passivity of the alloy, revealing the possibility of developing low-cost corrosion-resistant alloys from metals available from waste streams. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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