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International Journal of Corrosion
Volume 2013, Article ID 267353, 9 pages
http://dx.doi.org/10.1155/2013/267353
Research Article

The Corrosion Performance of Galvanized Steel in Closed Rusty Seawater

1Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received 19 July 2013; Accepted 21 October 2013

Academic Editor: W. Ke

Copyright © 2013 Shuan Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The corrosion performance of galvanized steel in closed rusty seawater (CRS) was investigated using weight loss, Tafel polarization curve, and electrochemical impedance spectroscopy. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were carried out for morphological and chemical characterization of the rust layer absorbed on the zinc coating. Effects of temperature and hydrostatic pressure on corrosion resistance of galvanized steel were studied. Results indicated that rust layer could induce pitting corrosion on the zinc coating under the Cl erosion; high temperature accelerated the corrosion rate of zinc coating and inhibited the absorption of rust layer; the polarization resistance ( ) of galvanized steel increased with the increase of hydrostatic pressure in CRS.