| Autor: |
Neetu, Ireddy, Nikhila, Panda, Subha Sanket, Reddy, Uttam, Jain, Jayant, Mondal, K., Singh, Sudhanshu S. |
| Zdroj: |
Transactions of the Indian Institute of Metals; May2024, Vol. 77 Issue 5, p1265-1274, 10p |
| Abstrakt: |
In this work, the effect of aluminum content on the crevice corrosion behavior of the magnesium alloys has been investigated. The as-cast AZ31, AM60B and AZ80 alloys were subjected to the crevice corrosion in a freely aerated 3.5 wt.% NaCl solution, and the extent of the damage was quantified using weight loss measurement and 3D surface topography using an optical profilometer. The as-cast AM60B and AZ31 alloys exhibited the lowest and highest crevice corrosion resistances, respectively. The surface investigation using a scanning electron microscopy (SEM)/energy-dispersive spectroscopy (EDS) and analysis of the corrosion products by Raman spectroscopy, X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) suggested that the corrosion damage predominantly was primarily a function of the volume fraction and distribution of the Mg17Al12 precipitates. The lower corrosion resistance of the as-cast AM60B alloy (corrosion rate ~ 240 mpy) as compared to the as-cast AZ80 alloys (corrosion rate ~ 60 mpy) was attributed to the combined effect of the reduction in the barrier effect of the Mg17Al12 precipitates due to their discontinuous distribution and increase in the extent of the micro-galvanic effect due to the lower aluminum content in the α-Mg matrix in the AM60B alloy. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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