Effect of Ti on Corrosion of Cast AZ91 Magnesium Alloy

Xiu Lan Ai; Gao Feng Quan; Jun Yang

doi:10.4028/www.scientific.net/AMR.311-313.1457

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 311-313Effect of Ti on Corrosion of Cast AZ91 Magnesium...

Effect of Ti on Corrosion of Cast AZ91 Magnesium Alloy

Abstract:

Ti addition to AZ91 alloy was been investigated with conventional casting. The Corrosion resistance of all the different Ti addition content alloy was studied in 3.5% NaCl solution through weight loss measurement in constant immersion conditions and potentiodynamic polarization experiments.The results show that addition of Ti with an amount of 0.1~0.8wt% the corrosion resistant of alloy was improved. In the case of AZ91-0.8Ti alloy had minimum corrosion rate value , AZ91-0.4Ti alloy had minimim corrosion current density. After Ti added into alloy, the morphology of β phases was changed, TiAl₃ intermetallics appeared. The inhibiting effect of the β phases and TiAl₃ intermetallics in the AZ91-Ti alloy predominated in the long period immersion testing, but during short interval of electrochemical testing galvanic corrosion effect in the AZ91-Ti alloy predominated.

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Advanced Materials Research (Volumes 311-313)

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1457-1461

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https://doi.org/10.4028/www.scientific.net/AMR.311-313.1457

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August 2011

Authors:

Xiu Lan Ai, Gao Feng Quan, Jun Yang

Keywords:

AZ91 Magnesium Alloy, Corrosion, Ti Addition

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