The Effect of Cathodic Protection on Cracking of High-Strength Pipeline Steels, #350

The objective of this study was to establish the effect of cathodic protection (CP) to produce hydrogen that can cause cracking and in-service failures of high-strength pipeline steels, from X-70 to X-120, and to establish the effectiveness of cathodic protection in mitigating stress corrosion cracking (SCC). Specifically: (1) To establish the effectiveness of cathodic protection to mitigate SCC without causing hydrogen damage; (2) To assess the effects of underprotection and overprotection of CP; (3) To identify the type of cracking that can occur in high-strength pipeline steels under cathodic protection conditions; i.e., transgranular cracking similar to near-neutral pH stress corrosion cracking, or another type of hydrogen damage; (4) To correlate the microstructure and strength levels with hydrogen damage caused by CP; and (5) To identify any additional factors that contribute to susceptibility to hydrogen damage under CP conditions.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; Photos; References; Tables;
  • Pagination: 30p

Subject/Index Terms

Filing Info

  • Accession Number: 01641076
  • Record Type: Publication
  • Contract Numbers: DTPH56-08-T-000006
  • Files: NTL, TRIS, ATRI, USDOT
  • Created Date: Jul 3 2017 10:15AM