Effect of magnesium content on the corrosion behaviors of Grf/Al composite

Xu Wang; Guoqin Chen; Wenshu Yang; Qiang Guo; Gaohui Wu; Daming Jiang

doi:10.1007/s11661-010-0509-7

Effect of magnesium content on the corrosion behaviors of Gr_f/Al composite

Xu Wang^*
, Guoqin Chen
, Wenshu Yang
, Qiang Guo
, Gaohui Wu
, Daming Jiang

^*Corresponding author for this work

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Graphite-fiber-reinforced aluminum composites (Gr_f/Al) with different magnesium content were fabricated with the pressure infiltration method. Their corrosion behaviors were investigated by potentiodynamic polarization measurements, immersion tests, electrochemical impedance spectroscopy (EIS) analysis, and scanning electron microscopy (SEM). Both the corrosion potential (E _corr) and the pitting potential (E _pit) decreased with the increase of magnesium content, whereas the corrosion current density (i _corr) decreased sharply at first and then increased slightly. The i _corr of Gr_f/Al-3.2Mg was the lowest among the four composites with different magnesium contents, which indicated that Gr_f/Al-3.2Mg had the best corrosion resistance. EIS showed that the capacitive reactance of Gr_f/Al-8.5Mg was 1682 Ω × cm^-2, which was the worst, whereas that of Gr _f/Al-3.2Mg was 3498 Ω × cm^-2, which was the best. SEM results revealed that magnesium and silicon formed the Mg ₂Si phase in Gr_f/Al-3.2Mg, which hindered the extension of corrosion crack and improved the corrosion resistance.

Original language	English
Pages (from-to)	3458-3462
Number of pages	5
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	41
Issue number	13
DOIs	https://doi.org/10.1007/s11661-010-0509-7
State	Published - Dec 2010
Externally published	Yes

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title = "Effect of magnesium content on the corrosion behaviors of Grf/Al composite",

abstract = "Graphite-fiber-reinforced aluminum composites (Grf/Al) with different magnesium content were fabricated with the pressure infiltration method. Their corrosion behaviors were investigated by potentiodynamic polarization measurements, immersion tests, electrochemical impedance spectroscopy (EIS) analysis, and scanning electron microscopy (SEM). Both the corrosion potential (E corr) and the pitting potential (E pit) decreased with the increase of magnesium content, whereas the corrosion current density (i corr) decreased sharply at first and then increased slightly. The i corr of Grf/Al-3.2Mg was the lowest among the four composites with different magnesium contents, which indicated that Grf/Al-3.2Mg had the best corrosion resistance. EIS showed that the capacitive reactance of Grf/Al-8.5Mg was 1682 Ω × cm-2, which was the worst, whereas that of Gr f/Al-3.2Mg was 3498 Ω × cm-2, which was the best. SEM results revealed that magnesium and silicon formed the Mg 2Si phase in Grf/Al-3.2Mg, which hindered the extension of corrosion crack and improved the corrosion resistance.",

author = "Xu Wang and Guoqin Chen and Wenshu Yang and Qiang Guo and Gaohui Wu and Daming Jiang",

year = "2010",

month = dec,

doi = "10.1007/s11661-010-0509-7",

language = "英语",

volume = "41",

pages = "3458--3462",

journal = "Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science",

issn = "1073-5623",

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TY - JOUR

T1 - Effect of magnesium content on the corrosion behaviors of Grf/Al composite

AU - Wang, Xu

AU - Chen, Guoqin

AU - Yang, Wenshu

AU - Guo, Qiang

AU - Wu, Gaohui

AU - Jiang, Daming

PY - 2010/12

Y1 - 2010/12

N2 - Graphite-fiber-reinforced aluminum composites (Grf/Al) with different magnesium content were fabricated with the pressure infiltration method. Their corrosion behaviors were investigated by potentiodynamic polarization measurements, immersion tests, electrochemical impedance spectroscopy (EIS) analysis, and scanning electron microscopy (SEM). Both the corrosion potential (E corr) and the pitting potential (E pit) decreased with the increase of magnesium content, whereas the corrosion current density (i corr) decreased sharply at first and then increased slightly. The i corr of Grf/Al-3.2Mg was the lowest among the four composites with different magnesium contents, which indicated that Grf/Al-3.2Mg had the best corrosion resistance. EIS showed that the capacitive reactance of Grf/Al-8.5Mg was 1682 Ω × cm-2, which was the worst, whereas that of Gr f/Al-3.2Mg was 3498 Ω × cm-2, which was the best. SEM results revealed that magnesium and silicon formed the Mg 2Si phase in Grf/Al-3.2Mg, which hindered the extension of corrosion crack and improved the corrosion resistance.

AB - Graphite-fiber-reinforced aluminum composites (Grf/Al) with different magnesium content were fabricated with the pressure infiltration method. Their corrosion behaviors were investigated by potentiodynamic polarization measurements, immersion tests, electrochemical impedance spectroscopy (EIS) analysis, and scanning electron microscopy (SEM). Both the corrosion potential (E corr) and the pitting potential (E pit) decreased with the increase of magnesium content, whereas the corrosion current density (i corr) decreased sharply at first and then increased slightly. The i corr of Grf/Al-3.2Mg was the lowest among the four composites with different magnesium contents, which indicated that Grf/Al-3.2Mg had the best corrosion resistance. EIS showed that the capacitive reactance of Grf/Al-8.5Mg was 1682 Ω × cm-2, which was the worst, whereas that of Gr f/Al-3.2Mg was 3498 Ω × cm-2, which was the best. SEM results revealed that magnesium and silicon formed the Mg 2Si phase in Grf/Al-3.2Mg, which hindered the extension of corrosion crack and improved the corrosion resistance.

UR - https://www.scopus.com/pages/publications/78049427011

U2 - 10.1007/s11661-010-0509-7

DO - 10.1007/s11661-010-0509-7

M3 - 文章

AN - SCOPUS:78049427011

SN - 1073-5623

VL - 41

SP - 3458

EP - 3462

JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

IS - 13

ER -

Effect of magnesium content on the corrosion behaviors of Gr_f/Al composite

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