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International Journal of Polymer Science
Volume 2017 (2017), Article ID 6895649, 14 pages
https://doi.org/10.1155/2017/6895649
Research Article

Sulfate and Calcium Chloride Resistance of Steel/Glass Fiber-Reinforced Polymer Hybrid Panel for Improved Movable Weir Application

1Department of Bio-Industry Mechanical Engineering, Kongju National University, Yesan, Republic of Korea
2Department of Rural Construction Engineering, Kongju National University, Yesan, Republic of Korea

Correspondence should be addressed to C.-G. Park; rk.ca.ujgnok@krapgc

Received 24 December 2016; Revised 9 April 2017; Accepted 11 April 2017; Published 4 May 2017

Academic Editor: Joao M. L. Reis

Copyright © 2017 S.-K. Lee 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

This study evaluated the performance of a hybrid panel that can overcome the current problem of corrosion of the steel panels of improved movable weirs when they are exposed to a sulfate and calcium chloride environment such as sea water. A hybrid panel with glass fiber-reinforced polymer (GFRP) layers on both sides of a steel panel means that the central panel is not exposed to the external elements, which can avoid corrosion problems. In this study, to maximize the hybrid panel’s strength and durability, the moisture absorption characteristics and the durability in an accelerated environment were evaluated. The test results were considered to indicate no durability issues as the final absorption ratio was approximately 2.0% or less in all environments. Also, from the accelerated deterioration test results when the steel panel processed by sand blasting was applied in all accelerated deterioration environments, it satisfied the residual strength level of 65% or more. However, in the case without surface processing, upon exposure to MgSO4 solution, it did not satisfy the standard residual strength level of 65%. These results show that sand blasting on the surface of a steel panel is adequate for hybrid panels for improved movable weirs.