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| Effect of ph values on as-extruded magnesium alloy AM60 |
| ZENG Rongchang; ZHOU Wanqiu; HAN Enhou; KE Wei |
| State Key Laboratory for Corrosion and Protection; Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110016 |
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Cite this article:
ZENG Rongchang; ZHOU Wanqiu; HAN Enhou; KE Wei. Effect of ph values on as-extruded magnesium alloy AM60. Acta Metall Sin, 2005, 41(3): 307-311 .
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Abstract The corrosion morphologies of as-extruded magnesium alloy AM60
in 3.5%NaCl aqueous solutions with pH 3，7 and 12 were observed,
and the number and size of corrosion pits were
measured. The effect of pH values on corrosion of
AM60 and the role of AlMn
particles in corrosion were discussed. A
corrosion model of AM60 was put forward.
The experimental results indicate that the pitting
corrosion occurred in an acidic or neutral
3.5%NaCl aqueous solution, the pits initiated in the
α matrix around AlMn particles, whereas
Al element was dissolved in the rich-Al areas such as
AlMn particles and β phase, and the
honeycomb morphology was formed on the surface in
alkaline solutions. The number of corrosion
pits is most at pH 7.
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Received: 07 April 2004
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