| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Synthesis, Characterization, Modeling and Applications of Functional Porous Materials
|
| Presentation Title |
Optimized Porous Superhydrophobic Coating to Prevent Carbon Steel Corrosion |
| Author(s) |
Fangming Xiang, David Hopkinson |
| On-Site Speaker (Planned) |
Fangming Xiang |
| Abstract Scope |
Internal corrosion is the second leading cause of natural gas transmission pipeline incidents, but there is no established method to prevent it. As a result, the internal surface of carbon steel pipeline must be periodically cleaned and inspected to remove rust and avoid leaks. A superhydrophobic coating with porous nanostructures can reduce corrosion by minimizing contact with corrosive liquid. This is achieved by trapping air inside its pores, allowing the liquid to be suspended above tiny air pockets on its surface. However, this porous structure also allows water vapor to permeate through, causing corrosion underneath the coating. In this work, a porous superhydrophobic coating was combined with water-resistant corrosion inhibitors and/or gas barriers. By optimizing the material and nanostructure, the corrosion rate was reduced from 1.12 mm/year (bare carbon steel) to 0.06 mm/year in CO2-saturated salt water, enough to extend the service life of natural gas pipeline to >100 years. |