Initial corrosion behavior of AZ91 magnesium alloy in simulating acid rain under wet-dry cyclic condition |
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Authors: | ZHOU Wan-qiu SHAN Da-yong HAN En-hou KE Wei .College of Chemistry Life Science Shenyang Normal University Shenyang China .State Key Laboratory for Corrosion Protection |
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Affiliation: | ZHOU Wan-qiu,SHAN Da-yong,HAN En-hou,KE Wei 1.College of Chemistry , Life Science,Shenyang Normal University,Shenyang 110034,China,2.State Key Laboratory for Corrosion , Protection,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016 |
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Abstract: | Corrosion behavior of AZ91 magnesium alloy in simulating acid rain under wet-dry cyclic condition was investigated.The results show that corrosion potential shifts positively and the corrosion current density decreases at low wet-dry cyclic time.Further increase of the cyclic time results in the negative movement of corrosion potential and the increase of current density.SEM observation indicates that corrosion Occurs only in αphase,βphase is inert in corrosive medium,and the corrosion of AZ91 magnesium appears in uniform characteristic.XPS analysis suggests that the corrosion product is mainly composed of oxide and hydroxide of magnesium and aluminum,and a small amount of sulfate is also contained in the film. |
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Keywords: | magnesium alloy atmospheric corrosion simulating acid rain wet-dry cycle |
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