Citation

Fan L, Tang F, Reis ST, Chen G, Koenigstein ML. Acta metallurgica Sinica (English Letters) 2017; 30(4): 390-398.

Copyright

(Copyright © 2017)

DOI

10.1007/s40195-017-0554-y

PMID

unavailable

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.

Keywords: Pipeline transportation

Language: en

Keywords

Transmissions; Spectroscopy; Sodium chloride; Pipeline corrosion; Pipelines; Steel corrosion; Steel pipe; Corrosion resistant coatings; Electrochemical corrosion; Electrochemical impedance spectroscopy; Scanning electron microscopy; Corrosion resistance; Enamels; Shotcreting