Details:

Creators:
Azarmi, Fardad ; Huang, Ying
Azarmi, Fardad ; Huang, Ying Less -
Corporate Creators:
North Dakota State University
Corporate Contributors:
United States. Department of Transportation. Pipeline and Hazardous Materials Safety Administration
Subject/TRT Terms:
[+]
Cathodic Protection Corrosion Protection Metal Coatings Pipelines Protective Coatings Sprays (Materials) Steel Pipe
Publication/ Report Number:
NDSU-12-20-2018
Resource Type:
Tech Report
Geographical Coverage:
United States
Edition:
Final Report
Corporate Publisher:
United States. Dept. of Transportation. Pipeline and Hazardous Materials Safety Administration
Abstract:
Corrosion is recognized as one major reason for the failures of on-shore underground steel pipes, which results in increase in maintenance cost and system downtime. To mitigate corrosion, a common method is to combine cathodic protection and coating techniques such as polymeric and metallic coatings. Polymeric coatings dominate the coating techniques due to their good performance on separating metal from the surrounding corrosive environments. However, corrosion may still develop beneath the polymeric coatings in random locations. In these circumstances, a strong metallic coating from high corrosive resistant materials deposited by thermal spraying techniques can be considered as a potential cost-effective alternative. These coatings can separate pipes from surrounding environments and meanwhile exhibit cathodic protection properties. For off-shore pipelines, some thermal sprayed coatings have been experimentally investigated for corrosion mitigation using aluminum and zinc, which have shown excellent performance. However, thermal sprayed metallic coatings for on-shore pipelines, which was initialized by this research team, are still under development. An initial study was carried out in the current project to study the feasibility of utilizing thermal spraying as a coating method for pipeline corrosion prevention. The experimental results demonstrated very positive corrosion resistance improvements using a thermal sprayed Al-Bronze coating. Although, the cost of coating material is relatively higher in this method, the long-term application can justify this technique with cost reduction associated with maintenance. Based on the gained valuable experiences from the current project, constant needs to further promote more fundamental studies in developing an effective and low cost thermal spraying coating system are noted for practical applications of on-shore pipeline corrosion mitigation.
Format:
PDF
Funding:
DTPH56-15-H-CAAP06
Collection(s):
PHMSA Collection
Main Document Checksum:
[+]
urn:sha256:761d3fba5531e8f5da20c04791d8102d5565adc26eb3963e38eb0ffa268da924
Download URL:
https://rosap.ntl.bts.gov/view/dot/56223/dot_56223_DS1.pdf
File Type:

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