The effect of electromagnetic stirring on the microstructure and corrosion of mischmetal modified AZ91D magnesium alloy

• Autorzy: Jin, Y. X. , Hua, L. , Xu, X. , Peng, Q.
• Języki publikacji: EN

Abstrakty

EN

The microstructure and corrosion behaviour of mischmetal modified AZ91D magnesium alloy in the presence or absence of a rotating electromagnetic field have been investigated. The study suggests that the size and volume fraction of the ? (Mg17Al12) phase in the alloy decreases as magnetic field intensity increases. The immersion test results show that the mass loss for the alloy solidified in the absence of a magnetic filed is always larger than that for the alloy solidified under magnetic field. The electrochemical corrosion experiments indicate that the corrosion potential of the alloys increases from -1.56 to -1.51 V, while the corrosion current density decreases from 6.31 to 1.58 mAocm-2, and the charge transfer resistance increases from 3.17 to 11.32 k?ocm2 as the excitation voltage increases from 0 to 120 V. The enhancement of the corrosion resistance is attributed to the grain refinement, and to the volume fraction reduction of the ? (Mg17Al12) phase under a rotating electromagnetic field.

Słowa kluczowe

EN

microstructure; corrosion; magnesium alloy; mischmetal

• Czasopismo: Materials Science Poland
• Rocznik: 2009
• Tom: Vol. 27, No. 1
• Strony: 171--185
• Opis fizyczny: Bibliogr. 20 poz.

Twórcy

autor

Jin, Y. X.

autor

Hua, L.

autor

Xu, X.

autor

Peng, Q.

• School of Materials Science and Engineering, Taiyuan University of Technology, 030024 Taiyuan PR China

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