Dissecting Coating Disbondments

Details

• Creators:
  Brossia, Sean
• Corporate Creators:
  Det Norske Veritas, Incorporated
• Corporate Contributors:
  United States. Dept. of Transportation. Pipeline and Hazardous Materials Safety Administration
• Subject/TRT Terms:
  Bond Strength (Materials) Coatings Corrosion Failure Field Studies Laboratory Tests Maintenance And Preservation Pipelines Research Hub
• Publication/ Report Number:
  Report No./DNV Reg No.: ENAUS 811 Brossia (101131) Rev 1
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• TRIS Online Accession Number:
  01643609
• Edition:
  Final Report, Rev 1
• Corporate Publisher:
  Det Norske Veritas, Incorporated
• Abstract:
  Coatings are the primary means for imparting corrosion protection to gas and liquid pipelines. Though cathodic protection is also often applied, if no coating was present the demand for supplied current to effectively catholically protect the pipe would be cost-prohibitive. Because coatings are the main line of defense, understanding how they disbond from the pipe and lead to defects and flaws which in turn could result in subsequent corrosion is important. The objective of this project was to identify the conditions promoting coating disbondment during in-service exposure. A set of variables including coating chemistry, surface chemistry, surface roughness, anchor pattern, coating underside chemistry, and optical analysis was investigated and the critical parameters leading to disbondment evaluated. Developing a better understanding of the coating disbondment process, especially concerning the initial stages of coating degradation, gained during the project will serve as a stepping stone for developing a field-based methodology to predict long-term coating performance and to identify the onset of disbondment.
• Format:
  PDF
• Funding:
  DTPH56-06-T-000018
• Collection(s):
  US Transportation Collection PHMSA Collection
• Main Document Checksum:
  urn:sha256:7d7e09eb1a7336e7347b3772b86948057c93b876d4c9594db12f5da49410f9b2
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/36467/dot_36467_DS1.pdf
• File Type:
  [PDF - 2.57 MB ]