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Electrochemical Investigation on Environmental Degradation of Magnesium Rare Earth Alloys

Citation

Ninlachart, Jakraphan. (2017-08). Electrochemical Investigation on Environmental Degradation of Magnesium Rare Earth Alloys. Theses and Dissertations Collection, University of Idaho Library Digital Collections. https://www.lib.uidaho.edu/digital/etd/items/ninlachart_idaho_0089n_11110.html

Title:
Electrochemical Investigation on Environmental Degradation of Magnesium Rare Earth Alloys
Author:
Ninlachart, Jakraphan
Date:
2017-08
Embargo Remove Date:
2019-08-29
Keywords:
Alkaline solution Chloride Corrosion Magnesium alloy Passivation Stress corrosion cracking
Program:
Chemical and Materials Science Engineering
Subject Category:
Materials Science
Abstract:

Magnesium rare earth alloys have excellent mechanical properties and good corrosion resistance; as a result, they are used in automobile and aerospace applications. EV31A (Elektron 21) and WE43C (Elektron 43) the two major types of magnesium rare earth alloys that were developed for high performance applications at elevated temperatures. Passivation and stress corrosion cracking behaviors of these magnesium rare earth alloys were investigated in this study. The effect of different heat treatment conditions of EV31A and WE43C on the environmental degradation behavior in alkaline solutions containing different chloride concentrations was investigated. In general, peak-aged condition show better passivation behavior in both alloys. The threshold chloride concentration for passivity break down in 0.1 M NaOH solution was 80 ppm for EV31A, and 200 ppm for WE43C in any heat treatment conditions. EV31A shows higher susceptibility to stress corrosion cracking than WE43C.

Description:
masters, M.S., Chemical and Materials Science Engineering -- University of Idaho - College of Graduate Studies, 2017-08
Major Professor:
Raja, Krishnan S
Committee:
Charit, Indrajit; Cheng, I. Francis
Defense Date:
2017-08
Identifier:
Ninlachart_idaho_0089N_11110
Type:
Text
Format Original:
PDF
Format:
application/pdf

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