Corrosion behaviour of 6061 Al-15vol. Pct. SiC composite and its base alloy in sulphuric acid medium
Corrosion behaviour of 6061 Al-15vol. Pct. SiC composite and its base alloy in sulphuric acid medium作者机构：Department of Chemistry National Institute of Technology Karnataka Surathkal Srinivasnagar 575025 Karnataka. India Department of Metallurgical and Materials Engineering National Institute of Technology Karnataka Surathkal Srinivasnagar 575025 Karnataka India
出 版 物：《Journal of Chemistry and Chemical Engineering》 (化学与化工（英文版）)
年 卷 期：2009年第3卷第8期
页 面：1-11,31页
学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
主 题：aluminium metal matrix composite acid corrosion
摘 要：In this paper the corrosion characteristics of Silicon carbide particulate-reinforced 6061 aluminum composite （ 6061 AI/SiCp composite ） and the base alloy are experimentally assessed. The corrosion tests are carried out at different temperatures in the concentration range of 0.01N to 1N sulphuric acid as corrosion media using Tafel extrapolation technique and Electrochemical Impedance Spectroscopy （EIS）. The results obtained from Tafel extrapolation technique and Electrochemical Impedance Spectroscopy are in good agreement. The results show an increase in the corrosion rate with increase in temperature as well as with increase in the concentration of the corrosion media. The thermodynamic parameters like energy of activation are calculated using Arrhenius theory equation and, enthalpy of activation and entropy of activation are calculated using transition state theory equation.
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