Corrosion Behavior of AZ91D Magnesium Alloy in Hand Sweat  Ⅲ Corrosion behavior of AZ91D magnesium alloy in lactic acid

J Chin Soc Corr Pro

2004, Vol. 24

Issue (6): 339-344 DOI:

Research Report

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Corrosion Behavior of AZ91D Magnesium Alloy in Hand Sweat Ⅲ Corrosion behavior of AZ91D magnesium alloy in lactic acid

Tao Zhang

中科院金属所

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Abstract Corrosion behavior of AZ91D alloy in lactic acid solutions with and without Cl- were discussed by EIS and polarization curves. The corrosion process of magnesium alloy in acidic solutions was controlled by three surface state variables: electrode potential(E), area of surface film of β phase (θ), and concentration of intermediate MgH2(Cm). During the corrosion process, a narrow periphery of αphase just around βphase was covered by the surface film extended from the film grown on β phase. Through this way, the α phase was partially protected. A new model was presented to describe the corrosion process of the magnesium alloy.

Key words: magnesium alloy AZ91D corrosion EIS polarization curves

Received: 14 May 2003

ZTFLH:

TG17.1

Corresponding Authors: Tao Zhang

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Tao Zhang. Corrosion Behavior of AZ91D Magnesium Alloy in Hand Sweat Ⅲ Corrosion behavior of AZ91D magnesium alloy in lactic acid. J Chin Soc Corr Pro, 2004, 24(6): 339-344 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2004/V24/I6/339

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