Effects of coatings on SCC of pipelines: New developments

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:205474

Beavers, J A; Thompson, N G ^[1]

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1. Cortest Columbus Technologies, Inc., Columbus, OH (United States)

This paper describes the role that coatings play in external as pipelines based on the relationship between the coatings and the three controlling parameters in SCC (metallurgy, stress, and environment). Surprisingly, the coating type can influence all three controlling parameters. There are clear differences in the performance of the coatings evaluated in the studies described in this paper. The FBE coatings exhibit a number of good characteristics including resistance to disbanding and the ability to conduct CP current at disbanded areas. The practice of grit blasting the surface prior to application of the FBE coating also improves resistance to SCC if properly performed. On the other hand, the polyethylene tape coatings discussed in this paper exhibit a number of properties that are detrimental to SCC resistance. These include poor disbanding to resistance, shielding of CP current, and poor resistance to the diffusion of corrosive gases.

• OSTI ID: 205474
• Report Number(s): CONF-950695--; ISBN 0-7918-1311-8
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
42 ENGINEERING
ADHESION
COMPARATIVE EVALUATIONS
CORROSION FATIGUE
CRACK PROPAGATION
NATURAL GAS INDUSTRY
PERFORMANCE TESTING
PIPELINES
PROTECTIVE COATINGS