Effect of Cu addition on microstructure and corrosion behavior of Al–15Mg<sub>2</sub>Si composite-Reference-Cited by-同舟云学术

Effect of Cu addition on microstructure and corrosion behavior of Al–15Mg₂Si composite

Published:2023-08-14 Issue:10 Volume:65 Page:1498-1507
ISSN:0025-5300
Container-title:Materials Testing
language:en
Short-container-title:

Author:

Hesami Leila¹,Taghiabadi Reza¹,Ghoncheh Mohammad Hossein²,Emami Mohammad³^ORCID,Saghafi Yazdi Morteza¹

Affiliation:

1. Imam Khomeini International University , Qazvin , Qazvin , Iran

2. University of New Brunswick , Fredericton , NB , Canada

3. University of Bonab , Bonab , Iran

Abstract

Abstract The Cu effect on the microstructure and corrosion resistance of Al–15Mg2Si composites was studied. The results showed that Cu addition decreased the average size of primary Mg2Si (Mg2SiP) particles, changed the hopper-like Mg2SiP particles to polyhedrals, and caused the formation of θ-Al2Cu and Q-Al5Mg8Si6Cu2 compounds in the composite matrix. According to the image analysis results, increasing the Cu content from 0.01 to 5 wt% halved the average size of Mg2SiP particles, increased their fraction by about 40 %, and increased the composite porosity content. The electrochemical impedance spectroscopy showed that adding 5 wt% of Cu resulted in an increase of about 3.7 times in the corrosion resistance as compared to Al–15Mg2Si composite. The beneficial effects of Cu were also confirmed by the potentiodynamic polarization experiments. Cu addition seems to promote less intense general corrosion than the base alloy’s localized attack.

Publisher

Walter de Gruyter GmbH

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Link

https://www.degruyter.com/document/doi/10.1515/mt-2023-0217/pdf

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