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中南大学学报(英文版)

Journal of Central South University

Vol. 28    No. 3    March 2021

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Corrosion damage evolution and mechanical properties of carbon fiber reinforced aluminum laminate
WU Xin-tong(吴欣桐)1, 2, ZHAN Li-hua(湛利华)1, 2, HUANG Ming-hui(黄明辉)1, 2, ZHAO Xing(赵兴)1, 2, WANG Xun(王迅)1, 2, ZHAO Guo-qing(赵国庆)1, 2

1. State Key Laboratory of High-performance Complex Manufacturing, Central South University,Changsha 410083, China;
2. School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China

Abstract:Fiber metal laminates (FMLs), a kind of lightweight material with excellent comprehensive performance, have been successfully applied in aerospace. FMLs reinforced with carbon fiber have better mechanical properties than those with glass or aramid fiber. However, carbon fiber binding metal may lead to galvanic corrosion which limits its application. In this paper, electrochemical methods, optical microscope and scanning electron microscope were used to analyze the corrosion evolution of carbon fiber reinforced aluminum laminate (CARALL) in corrosive environment and explore anti-corrosion ways to protect CARALL. The results show that the connection between carbon fiber and aluminum alloy changes electric potential, causing galvanic corrosion. The galvanic corrosion will obviously accelerate CARALL corroded in solution, leading to a 72.1% decrease in interlaminar shear strength, and the crevice corrosion has a greater impact on CARALL resulting in delamination. The reduction of interlaminar shear strength has a similar linear relationship with the corrosion time. In addition, the adhesive layers between carbon fiber and aluminum alloy cannot protect CARALL, while side edge protection can effectively slow down corrosion rate. Therefore, the exposed edges should be coated with anti-corrosion painting. CARALL has the potential to be used for aerospace components.

 

Key words: carbon fiber reinforced aluminum laminate; galvanic corrosion; electrochemistry; interlaminar shear strength; aluminum alloy

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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