CORROSION BEHAVIOR OF ANODIC FILM ON MAGNESIUM ALLOY IN NaCl SOLUTION

J Chin Soc Corr Pro

2007, Vol. 27

Issue (4): 210-214 DOI:

Research Report

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CORROSION BEHAVIOR OF ANODIC FILM ON MAGNESIUM ALLOY IN NaCl SOLUTION

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北京航空航天大学

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Abstract The corrosion behavior of anodic film on the AZ91D magnesium alloy in 3.5% NaCl aqueous solution was investigated by the saline immersion test.The results show that new corrosion points seldom occur on the surface of the said anodic film over the immersion time in 3.5% NaCl neutral aqueous solution after the first macroscopic corrosion point appeared on the anodic film whether it was sealed or not,while the previous corrosion point extends vertically and horizontally and turns into a corrosion pit which is in form of ＂dendrite＂. The pH value and temperature of the test solution affect substantially on the corrosion resistance of the anodic film. The corrosion rate in acidic solution is obviously faster than that in neutral or alkaline solutions, and the corrosion rate increases with increasing of the immersion solution temperature.A possible model about the corrosion process of the anodic film on the AZ91D magnesium alloy is therefore proposed based on the above experimental results.

Key words: magnesium alloy anodic film corrosion model NaCl

Received: 09 January 2006

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. CORROSION BEHAVIOR OF ANODIC FILM ON MAGNESIUM ALLOY IN NaCl SOLUTION. J Chin Soc Corr Pro, 2007, 27(4): 210-214 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2007/V27/I4/210

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