Initial Pitting Behaviour of LY12 Aluminium Alloy in Simulated Marine Atmosphere


Article Preview

By analyzing morphology, weight gain, pitting depth, potential and AC impendence in corrosion course, initial pitting behavior of LY12 aluminum alloy in simulated marine atmosphere was studied. Results indicated initial pitting of LY12 was affected much by Cl- sedimentation and atmosphere humidity, little by temperature below 35°C. Weight gain and pitting depth increased with rising of Clsedimentation quantity, humidity and temperature. Correlation of weight gain and time fitted Model Boltzman. In initial pitting course of LY12, open circuit potential changed little and Nyquist graph had the characteristic of adsorbent resist system.



Materials Science Forum (Volumes 519-521)

Edited by:

W.J. Poole, M.A. Wells and D.J. Lloyd




D. S. Han et al., "Initial Pitting Behaviour of LY12 Aluminium Alloy in Simulated Marine Atmosphere", Materials Science Forum, Vols. 519-521, pp. 747-752, 2006

Online since:

July 2006




[1] Naixin Xu, Lingyuan zhao, Cuihong Ding, Chengdian zhang, Runshen Li, Qingdong zhong: Laboratory observation of dew formation at an early stage of atmospheric corrosion of metals, Corrosion Science Vol. 44(2002) pp.163-170.


[2] M. Morcillo, B. Chico, L. Mariaca, E. Otero: Salinity in marine atmospheric corrosion: its dependence on the wind regime existing in the site, Corrosion Science Vol. 42(2000) pp.91-104.


[3] GB3190-82:The chemical composition of aluminum and aluminum alloys machining manufactures.

[4] HU Yanling, LI Di, GUO Baolan: Study on Evaluation of Localized Corrosion of 2024T3 Aluminum Alloys with EIS, Journal of Beijing University of aeronautics and astronautics Vol. 27(2001).

[5] WU Yinshun: Research Technique for Corrosion of Metals (Metallurgy Industry Publishing Company, Beijing, 1993) pp.70-73.