| 000 | 01691nab a2200181 4500 | ||
|---|---|---|---|
| 005 | 20260520001103.0 | ||
| 008 | 260224s2012 xxu | ||
| 245 | 0 | 0 | _aInfluence of lead on the microstructure and corrosion behavior of melt-conditioned, twin-roll-cast AZ91D magnesium alloy |
| 260 |
_a _b _cjun. 2012 |
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| 270 | _a06/09/2012 ; 06/09/2012 | ||
| 300 | _a9 p. ; 548-556 | ||
| 520 | _aThe influence of lead addition on the microstructure and the corrosion behavior of a melt-conditioned, twin-roll-cast (MCTRC) AZ91D magnesium alloy has been investigated. Electron probe microanalysis revealed that lead-containing (magnesium plumbide [Mg2Pb]) particles were formed in the alloy and were concentrated mainly at the interdendritic boundaries. Scanning Kelvin probe force microscopy indicated increased surface potentials for the Al-Mn intermetallics, the Pb-rich particles, and the ß phase, relative to the adjacent a-Mg matrix, suggesting their greater nobilities with respect to the a-Mg matrix. Corrosion testing revealed that the corrosion initiated at the a-eutectic/lead-containing particle and a-eutectic/Al-Mn particle interface, as a result of galvanic coupling between the intermetallics and a-eutectic. Corrosion subsequently propagated into the primary a-Mg matrix. The ß-Mg17Al12 phase network at the grain boundaries acted as a corrosion barrier, restricting the propagation of corrosion from one grain to an adjacent grain, thereby contributing to an improvement in the corrosion resistance of the MCTRC AZ91D magnesium alloy. | ||
| 581 | _a6 | ||
| 773 | 0 |
_tCorrosion _g68 |
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| 942 | _cARTICULO | ||
| 100 | 1 |
_aPawar, S. _952638 |
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| 999 |
_c187304 _d187304 |
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