2009W_ENGI_8673_L05_Matl_Selection

2001 12 2009 s kenny phd peng engi 8673 subsea

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Unformatted text preview: ipeline Engineering – Lecture 05 12 Corrosion Resistance Internal Corrosion – Factors Fluid Composition Sweet (CO2) Water (H2O, O2 and Cl) 13 Sour (H2S) Bacteria © 2009 S. Kenny, Ph.D., P.Eng. ENGI 8673 Subsea Pipeline Engineering – Lecture 05 13 Corrosion Resistance (cont.) Internal Corrosion – Mechanisms Wall thickness reduction Uniform Pits Grooves Stress corrosion cracking Pressure and loads Internal Corrosion – Significance Leak Rupture 14 © 2009 S. Kenny, Ph.D., P.Eng. ENGI 8673 Subsea Pipeline Engineering – Lecture 05 14 Corrosion Resistance (cont.) Internal Corrosion – Mitigation Strategies Process operations Materials selection Corrosion allowance Internal coatings Chemical treatment and inhibition 15 © 2009 S. Kenny, Ph.D., P.Eng. ENGI 8673 Subsea Pipeline Engineering – Lecture 05 15 Corrosion Resistance (cont.) External Corrosion Coatings Field Joints Cathodic Protection System Splash Zone Shore Approach 16 Impressed current Telluric currents © 2009 S. Kenny, Ph.D., P.Eng. ENGI 8673 Subsea Pipeline Engineering – Lecture 05 16 Linepipe...
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