Corrosion behaviour of silicon-carbide-particle reinforced AZ92 magnesium alloy

Pardo Gutiérrez Del Cid, Ángel; Merino S.; Merino Casals, María Concepción; Mohedano Sánchez, Marta; Arrabal Durán, Raúl

Corrosion behaviour of silicon-carbide-particle reinforced AZ92 magnesium alloy

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Official URL

https://doi.org/10.1016/j.corsci.2009.01.024

Publication date

2009

Authors

Pardo Gutiérrez Del Cid, Ángel

Merino S.

Merino Casals, María Concepción

Mohedano Sánchez, Marta

Arrabal Durán, Raúl

Publisher

Elsevier

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URI

https://hdl.handle.net/20.500.14352/105709

Citation

Pardo, A.; Merino, S.; Merino, M. C.; Barroso, I.; Mohedano, M.; Arrabal, R.; Viejo, F. Corrosion behaviour of silicon–carbide-particle reinforced AZ92 magnesium alloy. Corros. Sci. 2009, 51, 841-849 DOI:10.1016/j.corsci.2009.01.024.

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.