STATIC CORROSION BEHAVIOR OF IN-SITU NANOCRYSTALLINE Al2O3/Fe(Al) COMPOSITES

Yaping Bai, Jiandong Xing, Yongchun Guo, Jianping Li, Qian Huang and Yimin Gao
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Yaping Bai: School of Materials and Chemical Engineering, Xi’an, Technological University, Xi’an, Shaanxi 710021, P. R. China
Jiandong Xing: #x2020;State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an, Jiaotong University, Xi’an, Shaanxi 710049, P. R. China
Yongchun Guo: School of Materials and Chemical Engineering, Xi’an, Technological University, Xi’an, Shaanxi 710021, P. R. China
Jianping Li: School of Materials and Chemical Engineering, Xi’an, Technological University, Xi’an, Shaanxi 710021, P. R. China
Qian Huang: #x2020;State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an, Jiaotong University, Xi’an, Shaanxi 710049, P. R. China
Yimin Gao: #x2020;State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an, Jiaotong University, Xi’an, Shaanxi 710049, P. R. China

Surface Review and Letters (SRL), 2017, vol. 24, issue 03, 1-11

Abstract: In this work, the static corrosion behaviors of Fe(Al), and 20 wt.% Al2O3/Fe(Al) composites with and without 4 wt.% Cr produced by mechanical alloying (MA) and plasma activated sintering (PAS) were investigated. The results showed that the main corrosion failure mode was pitting, and Fe(Al) had higher static corrosion resistance than those of Al2O3/Fe(Al) composites. The second phase Al2O3 addition resulted in an increase in phase interface and a large difference of the electron density between the Fe(Al) matrix and Al2O3 reinforcement. All these made the phase interface become the corrosion weaknesses. With 4 wt.% Cr addition, the static corrosion weight loss rate reduced by about 20% because Cr element could improve the stability of Al2O3 passivation film on the composite surface.

Keywords: Fe(Al) alloy; 20 wt.% Al2O3/Fe(Al) composites; Cr element; static corrosion behavior (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0218625X17500299

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