On Stress-Corrosion Cracking Initiation: Pitting Susceptibility and Cathodic Activity Near Nonmetallic Steel Inclusions

This study evaluates the pitting susceptibility and cathodic activity for endogenous, nonmetallic inclusions in the high-strength API-X52 and 60 in near-neutral, chloride and bicarbonate solutions. The inclusions are characterized in relation to the steel making method, particularly to the compositional variation across the thickness of a pipeline steel slab. Using conventional potentiodynamic scans, the pitting potentials (along with the …