Corrosion behaviour of silicon-carbide-particle reinforced AZ92 magnesium alloy |
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| Authors: | A Pardo S Merino I Barroso R Arrabal |
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| Affiliation: | a Departamento de Ciencia de Materiales, Facultad de Químicas, Universidad Complutense, 28040 Madrid, Spain
b Departamento de Tecnología Industrial, Universidad Alfonso X El Sabio, 28691, Villanueva de la Cañada, Madrid, Spain |
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| Abstract: | The corrosion behaviour of silicon-carbide-particle (SiCp) reinforced AZ92 magnesium alloy manufactured by a powder metallurgy process was evaluated in 3.5 wt.% NaCl solution, neutral salt fog (ASTM B 117) and high relative humidity (98% RH, 50 °C) environments. The findings revealed severe corrosion of AZ92/SiC/0-10p materials in salt fog environment with formation of corrosion products consisting of Mg(OH)2 and (Mg,Al)x(OH)y. The addition of SiCp increased the corrosion rate and promoted cracking and spalling of the corrosion layer for increasing exposure times. Composite materials revealed higher corrosion resistance in high humidity atmosphere with almost no influence of SiCp on the corrosion behaviour. |
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| Keywords: | A Magnesium A Metal matrix composites B Polarization B Atmospheric corrosion B Weight loss |
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