Protective Coatings for Prevention of Stress Corrosion Cracking (SCC) in the Steel Pipes

Protective Coatings for Prevention of Stress Corrosion Cracking (SCC) in the Steel Pipes

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Part of #Protective Coatings for Prevention of Stress Corrosion Cracking (SCC) in the Steel Pipes# :

Publishing year : 2009

Conference : Third International Color and Contemporary Congress

Number of pages : 15

Abstract: Stress Corrosion Cracking (SCC) in pipelines is a type of environmentally assisted cracking (EAC). SCC in pipelines is further characterized as "high pH SCC" or "near neutral pH SCC". Coating type and condition have a profound effect on SCC. SCC will not occur under an intact coating that prevents the contact of groundwater with the pipe surface. This paper reviews various types of coatings, for susceptibility to SCC occurrence. It has been argued that FBE, liquid epoxies, and urethane coatings meet all three requirements of an effective coating against SCC, and tape coatings and bituminous coatings have been shown to be more susceptible to SCC. Regardless of the coating, the finish line must be prepared to white (NACE No.1 / SSPC-SP 5) or near white (NACE No. 2 / SSPC-SP 10) to remove the mill scale and to impart sufficient residual compressive stresses to retard SCC initiation.