Altering CP criteria part of unified anti-SCC approach

Hamed Mansoori Reza Mirzaee National Iranian Oil Co. Ferydoun Esmaeilzadeh Dariush Mowla Shiraz University Shiraz, Iran Altering cathodic protection criteria, repairing coatings on weld joints or the welds themselves, and using coatings less sensitive to disbonding can reduce stress corrosion cracking-induced pipeline failures. High-density polyethylene coatings are vulnerable to disbonding. Disbonding can be initiated by either cathodic and osmotic conditions or a combination of these. Applying 100-mv polarization instead of the off-potential condition can prevent coating from being disbonded by delivering a less intensive current for protecting the pipe. External soil stress accompan...

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