Investigation of Zirconium Effect on the Corrosion Resistance of Aluminum Alloy Using Electrochemical Methods and Numerical Simulation in an Acidified Synthetic Sea Salt Solution.

Yong-Sang Kim,Byeong-Seon An,Cheol-Woong Yang,Young Lee,Jong Park,Jung-Gu Kim

doi:10.3390/ma11101982

Yong-Sang Kim, Byeong-Seon An + Show 4 more

Open Access

https://doi.org/10.3390/ma11101982

Copy DOI

Journal: Materials	Publication Date: Oct 15, 2018
Citations: 16	License type: CC BY 4.0

Affiliation: Sungkyunkwan University, Institute for Basic Science

Abstract

Corrosion resistance of Zr that has been added to an Al alloy (U1070) is higher than that of a commercial Al alloy (A1070). A decreasing number and size of Al3Fe intermetallic particles (IMPs) were observed by electron microprobe analysis and transmission electron microscopy. Based on the numerical corrosion simulation, it was confirmed that decreasing the number and size of IMPs was favorable for improving the corrosion resistance of the Al alloy due to the reduction of the galvanic effect. In addition, Al3Zr was found to be insignificant in promoting galvanic corrosion within the Al matrix. Thus, Zr is an advantageous alloying element for improving the corrosion resistance of the Al alloy.

Highlights

Applications of aluminum (Al) alloys have expanded across numerous industries due to their desirable properties, including their light weight, high heat conduction, and favorable electrical and mechanical characteristics [1]
FE-electron probe microanalysis (EPMA) and FE-transmission electron microscopy (TEM) were conducted to determine the effect of intermetallic particles (IMPs) on an Al matrix, followed by numerical corrosion conducted to determine the effect of IMPsofonIMPs an Al by numerical corrosion simulation simulation to investigate the influence as amatrix, functionfollowed of distribution and size
In the corrosion to investigate the influence of IMPs as a function of distribution and size

Summary

Introduction

Applications of aluminum (Al) alloys have expanded across numerous industries due to their desirable properties, including their light weight, high heat conduction, and favorable electrical and mechanical characteristics [1]. One typical applications for an Al alloy is as a heat exchanger in an air conditioner [2,3,4,5]; notably, Al is a commonly used material for heat exchange because of its high formability, good specific strength, low density, and high thermal conductivity [6,7]. It is a more economical material than copper, which is the original material that is used in heat exchanger applications. The improvement of Al corrosion resistance in this highly concentrated salt water is necessary for acceptance of the corrosion durability test and for increasing corrosion reliability

Methods

Results

Conclusion