Abstract
Corrosion and corrosion-induced damage have resulted mostly in malfunctions and sometimes even in failures of metallic structures, including oil and gas pipelines. In this study, new high-performance composite coatings were developed by incorporating nanoparticles in the polymer resins with applications to oil and gas pipelines. The graphene nanoplatelets under different concentrations were used to prepare the epoxy-based nanocomposites and were then evaluated through mechanical and electrical tests. The integration of high-speed disk and ultrasonication were adopted as the dispersion technique to overcome nanoparticle agglomeration. Electron microscopy techniques were used to investigate the agglomeration. The new composites were qualitatively and quantitatively evaluated in terms of contact angle, surface roughness, adhesion to the substrate, corrosion resistance, and abrasion resistance. The results suggested that the composite with 0.5~1.0 wt.% of the graphene nanofillers led to the largest improvement in both mechanical and electrochemical properties. Distribution of nanoparticles in the matrix was observed using scanning electron microscopy and surface roughness using atomic force microscopy. Large agglomeration that was observed at the higher concentrations mainly resulted in the reduction of corrosion resistance and abrasion resistance.
Highlights
The United States consists of over 2.6 million miles of gas and oil pipelines
As the major pipeline system, the onshore transmission metallic pipelines for gas and hazardous liquids demand a high standard of safety
The report [3] revealed that corrosion of onshore gas and liquid transmission pipelines were responsible for a cost of over $7 billion. One reason for this is that most of the oil and gas pipelines are made from low-carbon steel, meaning it is vulnerable to corrosion as the main element is iron [4,5]
Summary
The United States consists of over 2.6 million miles of gas and oil pipelines. As the major pipeline system, the onshore transmission metallic pipelines for gas and hazardous liquids demand a high standard of safety. Different to previous work [22], Yu et al [23] found that a higher content of graphene nanoparticles still provided high performance in resistance to corrosion and gas barrier. They evaluated the nanocomposites with varied contents of graphene from 0.5 to 2.0 wt.% and concluded that 2.0 wt.% of GNP additions achieved a great improvement of anti-corrosion performance and gas barrier properties. The objectives of this study aim to evaluate the effect of incorporating GNPs into epoxy adhesive as additions to develop high-performance coatings for oil and gas pipeline applications. We evaluated nanofiller reinforcement in the polymer matrix by using scanning electron microscopy (SEM) and surface roughness using atomic force microscopy
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