Experimental Set-up for Corrosion Study of Nitriding Surface Heat Treatment on MgAZ91D Magnesium Alloy

Abstract

MgAZ91D is an alloy which has high general strength, low density and high formability. Therefore, magnesium alloy, MgAZ91D is widely being used mainly in the aerospace, automotive and telecommunication industries. The main disadvantage of MgAZ91D is its low resistance towards corrosion attack. Therefore, this research objective is on improving the corrosion-resistant of magnesium alloy, MgAZ91D. Nitriding process surface heat treatment on the MgAZ91D substrate by subjecting the metal alloy with 95% nitrogen and 5% hydrogen gas environment in a heating chamber. The variables are time of exposure and temperature of the surface heat treatments. The nitrided samples will undergo immersion corrosion test to analyse the corrosion-resistant of the specimens. Further analysis on the microstructure formation, case depth and corrosion resistance correlation based on the test matrix. The experimentalsetup will determine the correct procedure and conclude the impact of surface heat treatment towards the corrosionresistant of MgAZ91D and improvement of the alloy. .