Corrosion behavior of SiC reinforced magnesium composites |
| |
| Authors: | Shruti Tiwari M Gupta |
| |
| Affiliation: | a Department of Materials and Metallurgical Engineering, Indian Institute of Technology, Kanpur 208 016, India
b Department of Mechanical Engineering, National University of Singapore, Singapore 119260, Singapore |
| |
| Abstract: | The corrosion behavior of two SiC reinforced Mg-based metal matrix composites, Mg-6SiC and Mg-16SiC (in volume percent), has been studied in freely aerated 1 M NaCl solution and compared with that of pure Mg. The presence of SiC particles deteriorated the corrosion resistance of magnesium. Corrosion resistance decreased with increasing SiC volume fraction. The galvanic corrosion current density between pure SiC and pure Mg has been experimentally measured using zero resistance ammeter technique and theoretically determined using mixed potential theory. Galvanic corrosion between Mg matrix and SiC reinforcement in the composites did not contribute significantly to the overall corrosion rate. Electrochemical impedance spectroscopy indicated that the higher corrosion rates for the composites could be related to the defective nature of surface film. |
| |
| Keywords: | A Composites Magnesium SiC reinforcement B Polarization EIS SEM XRD C Galvanic corrosion Interfaces Passive film |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
