Towards the Development of Novel Hybrid Composite Steel Pipes: Electrochemical Evaluation of Fiber-Reinforced Polymer Layered Steel against Corrosion.

Fatima Ghassan Alabtah,Marwan Khraisheh,Elsadig Mahdi,Elsadig Eltai,Faysal Fayez Eliyan

doi:10.3390/polym13213805

Abstract

Corrosion remains one of the major and most costly challenges faced by the steel industry. Various fiber-reinforced polymer coating systems have been proposed to protect metallic piping distribution networks against corrosion. Despite increasing interest among scientific and industrial communities, there is only limited predictive capability for selecting the optimum composite system for a given corrosive condition. In this study, we present a comprehensive evaluation of the electrochemical behavior of two different fiber-reinforced polymer composite systems against the corrosion of carbon steel pipes under a wide range of acidic and corrosive solutions. The composites were made of glass and Kevlar fibers with an epoxy resin matrix and were subjected to corrosive solutions of 0.5 M NaCl, 0.5 M HCl, and 0.5 M H2SO4. The kinetics of the corrosion reactions were evaluated using potentiodynamic polarization (PDP) tests. In addition, electrochemical impedance spectroscopy (EIS) tests were carried out at open circuit potentials (OCPs). It was demonstrated that the glass fiber-reinforced polymer coating system offered the best protection against corrosion, with a high stability against deterioration when compared with epoxy and Kevlar fiber-reinforced polymer coating systems. Scanning electron microscopy images revealed cracks and deteriorated embedded fibers due to acid attack, sustained/assisted by the diffusion of the corrosion species.

Highlights

Corrosion is considered to be the leading cause of failure in pipelines transporting gases and liquids [1]
The conventional metallic and composite material-based pipelines widely used in the steel industry are likely to experience catastrophic failures due to corrosion and abrasion [6]
We evaluate the electrochemical behavior of fiber-reinforced polymers (FRPs) systems against the corrosion of carbon steel pipes under various acidic and corrosive solutions

Summary

Introduction

Corrosion is considered to be the leading cause of failure in pipelines transporting gases and liquids [1]. Metallic and composite pipelines are the most cost-effective way of transporting water, oil, and gas [5]. The conventional metallic and composite material-based pipelines widely used in the steel industry are likely to experience catastrophic failures due to corrosion and abrasion [6]. Corrosion degrades the strength capacity of metallic pipelines, while matrix cracking/abrasion causes the leakage of composite pipelines [7]. Both corrosion and abrasion cause significant losses and decrease the structural integrity of pipelines [8]

Methods

Results

Conclusion