ABSTRACT
INTRODUCTION
LABORATORY TECHNIQUES FOR EVALUATION OF COATINGS ON STEEL

  • Macroscopic examination.

  • Microscopic examination – optical and scanning electron microscopy.

  • Physical testing - thickness testing, pinhole testing, adhesion testing, and determination of the plane of delamination, hardness testing, and surface roughness (profile) testing.

  • Chemical analysis - Fourier transform infrared spectroscopy for organic functional group analysis, gas chromatography – mass spectrometry for organic compound separation, identification and quantification, differential scanning calorimetry for melt range and thermal properties, scanning electron microscopy with associated energy dispersive x-ray spectroscopy for elemental analysis, and x-ray photoelectron spectroscopy for surface elemental analysis.

  • Accelerated environmental exposure tests - salt spray (fog) tests, humidity tests, and ultraviolet light (QUV).

Keywords:
materials and corrosion, Corrosion Inhibition, data quality, flowline corrosion, oilfield chemistry, well integrity, coating system, riser corrosion, Corrosion Management, Subsurface Corrosion
Subjects:
Production Chemistry, Metallurgy and Biology, Pipelines, Flowlines and Risers, Materials and corrosion, Well Integrity, Subsurface corrosion (tubing, casing, completion equipment, conductor), Corrosion inhibition and management (including H2S and CO2)
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2019. NACE International
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