کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
187683 459647 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical behavior of a discontinuously A6092/SiC/17.5p metal matrix composite in chloride containing solution
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Electrochemical behavior of a discontinuously A6092/SiC/17.5p metal matrix composite in chloride containing solution
چکیده انگلیسی

Aluminum alloys are used widely in automotive and aerospace industries. The demand for weight savings materials of superior mechanical, thermal and electrical properties has focused attention on aluminum metal matrix composites (AMMCs). AMMCs have been applied in areas that can cost-effectively capitalize on improvements in specific stiffness, specific strength, fatigue resistance, wear resistance, and coefficient of thermal expansion. However, AMMCs typically have lower damage tolerance properties than their unreinforced counterparts, and hence the extent of application in primary structures has been limited. In this paper, the corrosion resistance of ALCOA peak-aged Al6092/SiC/17.5p composite has been evaluated by recording of impedance spectra during immersion over one week in an air-exposed 3.5% NaCl. Results confirmed the occurrence of galvanic, crevice, intergranular corrosion and pitting attack due to the inhomogeneous structure of the composite which is the main reason behind enhancing the corrosion susceptibility. This paper formulates a complex hypothesis concerning the corrosion mechanisms of A6092/SiC/17.5p metal matrix composite in chloride containing solution as a function of time. A four-stage corrosion mechanism has been proposed to explain the sequence and the reasons of occurrence of each corrosion form.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 88, 15 January 2013, Pages 129–134
نویسندگان
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