Abstract
Corrosion is one of the main causes of incidents occurred in hazardous liquid and gas transmission pipelines in the USA, resulting in a loss of over $12 billion per year. In this study, the corrosion resistance of pipeline steel coated with five types of enamel was investigated in 3.5 wt% NaCl solution with linear polarization resistance and electrochemical impedance spectroscopy tests. Steel coupons were cut from API 5L X65 pipeline steel and coated with five types of enamels using the wet process. The microstructures of all enamel samples were examined by scanning electron microscopy. Experimental results indicate that all enamel coatings increase the corrosion resistance of pipeline steel, and pure enamel PE2, mixed enamels ME1 and ME2 have higher corrosion resistances than pure enamel PE1 and mixed enamel ME3.
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The authors gratefully acknowledge the financial support provided by the US Department of Transportation under Award No. DTPH5615HCAP10. The findings and opinions expressed in this paper are those of the authors only and do not necessarily reflect the views of the sponsor.
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Fan, L., Tang, F., Reis, S.T. et al. Corrosion Resistance of Transmission Pipeline Steel Coated with Five Types of Enamels. Acta Metall. Sin. (Engl. Lett.) 30, 390–398 (2017). https://doi.org/10.1007/s40195-017-0554-y
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DOI: https://doi.org/10.1007/s40195-017-0554-y