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Corrosion influence on surface appearance and microstructure of compo cast ZA27/SiCp composites in sodium chloride solution

Authorized Users Only
2016
Authors
Bobić, Biljana
Bajat, Jelena
Bobić, Ilija
Jegdić, Bore
Article (Published version)
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Abstract
The influence of corrosion on the surface appearance and microstructure of particulate ZA27/SiCp composites was examined after 30 d immersion in a sodium chloride solution with the access of atmospheric oxygen. The composites with different contents of SiC micro-particles were synthesized via compo casting. Microstructural studies by means of optical microscopy (OM) and scanning electron microscopy (SEM) showed that corrosion occurred in the composite matrices, preferentially in regions of the η phase, rich in zinc. The corrosion processes did not affect the silicon carbide particles incorporated in the matrix alloy. According to the results of electrochemical polarization measurements, an increase in the content of SiC particles in the composite matrice has led to the lower corrosion resistance in the composites.
Keywords:
Atmospheric oxygen / Composite matrices / Corrosion / Corrosion rate / Corrosion resistance / Electrochemical corrosion / Electrochemical polarization measurement / Metallic matrix composites / Microstructure / Polarization / Polarization resistances / Scanning electron microscopy / Silicon carbide / Silicon carbide particles / Sodium / Sodium chloride / Sodium chloride solution / Surface appearance / ZA27 alloy / Zinc castings
Source:
Transactions of Nonferrous Metals Society of China (English Edition), 2016, 26, 6, 1512-1521
Publisher:
  • Elsevier
Projects:
  • Development of the tribological micro/nano two component and hybrid selflubricating composites (RS-35021)
  • The effect of nano- and microconstituents on the synthesis and characteristics of novel composite materials with metal matrix (RS-172005)

DOI: 10.1016/S1003-6326(16)64257-7

ISSN: 1003-6326

WoS: 000379548800006

Scopus: 2-s2.0-84991707547
[ Google Scholar ]
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/3650
Collections
  • Radovi istraživača / Researchers' publications
Institution
IHTM

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