| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Substrate Protection for Corrosion Prevention
|
| Presentation Title |
Advanced Composite Coating for Carbon Steel Corrosion Prevention |
| Author(s) |
Fangming Xiang, Christy M. Koerner, David P. Hopkinson, Margaret E. Ziomek-Moroz |
| On-Site Speaker (Planned) |
Fangming Xiang |
| Abstract Scope |
In natural gas transmission pipelines, conventional coatings based on epoxy, paint, and polyethylene are widely used to prevent carbon steel corrosion due to reasonable barrier property and high chemical stability. However, these conventional coatings are not impermeable to corrosive species and may not be tightly bonded to the steel surface, leading to underfilm corrosion. A 60-nm-thick layer-by-layer (LbL) assembly containing a polymer (polyethylenimine) and a corrosion inhibitor (tannic acid) can completely prevent water-induced corrosion and significantly enhance surface adhesion through coordination and ionic bonding, but it tends to swell and subsequently lose its corrosion resistance when exposed to high concentrations of CO2 and NaCl. By using a conventional coating as the top layer and a LbL assembly as the bottom layer, we have created a composite coating that combines the complementary advantages of both constituent layers, demonstrating a synergistic approach for maximizing the corrosion resistance of anti-corrosion coatings. |