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EFFECTS OF THE SOLUBLE SALTS IN DESERT DUST ON ATMOSPHERIC CORROSION OF ALUMINIUM |
ZHENG Qifei; SUN Shuangqing; WEN Junguo; LI Defu |
General Research Institute for Nonferrous Metals; Beijing 100088 |
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Abstract Atmospheric corrosion of aluminium deposited with desert dust was simulated using a laboratory-accelerated test of cyclic wet-dry. Effects of the soluble salts in desert dust on atmospheric corrosion of aluminium were studied through mass loss, scanning electron microscope (SEM) and atmosphere corrosion monitor (ACM). The results demonstrated that the soluble salts in dust can widen the scope of relative humidity in which atmospheric corrosion occurs. Atmospheric corrosion of aluminium was getting more seriously with the increasing of the salt content in desert dust. MgCl2 in desert dust had the strongest influence on atmospheric corrosion of aluminium, then did NaCl, MgSO4 and Na2SO4 had the smaller influence.
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Received: 18 August 2008
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Corresponding Authors:
ZHENG Qifei
E-mail: zhengqf@grinm.com
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