Corrosion Behavior and Protection Efficiency of 2024Al and SiCp/2024Al Metal Matrix Composite

材料科学技术（英文）, 2002, 18(4): 351-353.

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1.School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

2.School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

3.School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

4.School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

5.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

6.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

7.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

基金项目: State Key Laboratory for Metal Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences and the National Natural Science Foundation of China(59972004) The financial supports from the Research Fund for the Doc toral Program of Higher Education(97014517)

Corrosion Behavior and Protection Efficiency of 2024Al and SiCp/2024Al Metal Matrix Composite

Keywords： 2024 Al

The corrosion resistance of 2024 Al and SiC particle reinforced 2024 Al metal matrix composite (SiCp/2024Al MMC)in 3.5% NaCl solution was investigated with electrochemical method and immersion test, and the corrosion protection of sulfuric acid anodized coatings on both materials was evaluated by electrochemical impedance spectroscopy. The results showed that the SiCp/2024Al MMC is more susceptible to corrosion than its matrix alloy in 3.5% NaCl.For 2024Al, the anodized coating provides excellent corrosion resistance to 3.5% NaCl. The anodized coating on the SiCp/2024Al provides satisfactory corrosion protection, but it is not as effective as that for 2024Al because the structure of the anodized layer is affected by the SiC particulates.

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Corrosion Behavior and Protection Efficiency of 2024Al and SiCp/2024Al Metal Matrix Composite

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