Stress-Corrosion Cracking
Direct Assessment (SCCDA)
High/Low pH Types

  • Author: Technical
  • Level: Advanced
  • Study time: 30 minutes
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Course overview
Does High- or Low-Level pH SCC constitute a threat to your pipeline system?  

Some of the factors that initiate SCC are operating stress, operating temperature, electrolyte, age of pipeline, and coating type.

    Pipelines susceptible to high pH SCC:
  • Operating stress exceeds 60% of specified minimum yield strength (SMYS)
  • Operating temperature exceeds 100 °F
  • The segment is less than 20 miles downstream from a compressor station.
  • The age of the pipeline is greater than 10 years.
  • Coating type is other than fusion-bonded epoxy (FBE) 
                                                                      Pipelines susceptible to neutral or low pH SCC:
  • Dilute near neutral pH electrolyte.
  • Ground or lower temperatures.
  • Coating types that shield.
  • Video time: 25 minutes
  • Exams: 1

Joe Pikas

Content SME-V.P. for Pipeline Integrity and Corrosion Engineering Services for Technical Toolboxes
Joe Pikas is a consultant for Technical Toolboxes with more than 50 years of experience in pipeline construction, operations, corrosion control design, and implementation, including pipeline engineering management. He is an expert in pipeline integrity management, risk management, coating materials selection, cathodic protection design, and testing, and internal and external pipeline corrosion control. In 2009, he was awarded the NACE Distinguished Service Award and received an industry award in 2002 from AGA, GTI, INGAA, NACE, OPS, and PRCI International. Also, he has contributed over 50 papers to industry trade magazines, NACE, SSPC, and other publications and conferences.