The synergistic effects of texture and continuous precipitates on the corrosion resistance of AZ80 magnesium alloy

Abstract

The corrosion resistance of the as-forged and as-aged AZ80 alloy was analyzed through immersion tests, electrochemical measurements, and observation of corrosion morphology. The synergistic effects of texture and continuous Mg17Al12 precipitates on the corrosion behavior were investigated in this study. The results obtained from hydrogen evolution, weight loss, and electrochemistry tests showed that texture plays a more significant role in improving the corrosion resistance than continuous precipitates. However, continuous precipitates can further enhance corrosion resistance. The corrosion surface containing a single (10−10) plane texture exhibits excellent corrosion performance than that with a mixture texture composing of (0001) and (10−10) texture. Continuous precipitates that are parallel to the corrosion surface are more conducive to forming excellent corrosion barriers. Consequently, their effect on improving corrosion performance is more significant than those that are perpendicular to the corrosion surface. Exerting the synergistic effects of texture and continuous precipitates is a promising approach to improve the corrosion resistance of the AZ80 alloy.