Corrosion behaviors of Al alloy LC4 in simulated polluted atmospheric environments

J Chin Soc Corr Pro

2005, Vol. 25

Issue (6): 321-326 DOI:

Research Report

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Corrosion behaviors of Al alloy LC4 in simulated polluted atmospheric environments

Zhenyao Wang;Teng Ma;Wei Han;Guocai Yu

中科院金属所

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Abstract The corrosion behaviors of typical high-strength aluminum alloy LC4 was studied by accelerated corrosion tests of cyclic wet-dry intermittent immersion designed to simulated industrially polluted atmospheric environment, and corrosion mechanism was also discussed. The main experimental techniques include mass loss, morphological check of samples and analysis of corrosion products in different test time. The result shows that LC4, with or without cladding, has linear relationship of mass loss and test time in two chemical media, 0.02 mol/L NaHSO3 and 0.02 mol/L NaHSO3+0.006 mol/L NaCl respectively. Angle of setting samples was another important factor that can cause corrosion of aluminum alloys. Angle of setting exerts its effect by varying the wetness time of the surface of samples, longer wetness time with less angle of setting and vice versa. A layer of cladding on high-strength aluminum alloys can raise resistance of atmospheric corrosion evidently.

Key words: atmospheric corrosion aluminum alloy accelerated corrosion test surface analysis

Received: 22 July 2004

ZTFLH:

TG172.3

Corresponding Authors: Zhenyao Wang E-mail: zhywang@imr.ac.cn

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Zhenyao Wang; Teng Ma; Wei Han; Guocai Yu. Corrosion behaviors of Al alloy LC4 in simulated polluted atmospheric environments. J Chin Soc Corr Pro, 2005, 25(6): 321-326 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2005/V25/I6/321

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