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Metal Structures Rehabilitation: Dream or Reality? Dr. Ch. Pierre's Insight

Explore the possibility of rehabilitating heavily corroded buried metal structures, alongside a historical overview of corrosion, different types of corrosion, and criteria followed for protection. Learn about deep groundbed anodes and the various types of cathodic protection methods available. Presented by Dr. Ch. Pierre at ULB on November 4, 2004.

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Metal Structures Rehabilitation: Dream or Reality? Dr. Ch. Pierre's Insight

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  1. La réhabilitation « In Situ » de structures métalliques enterrées fortement corrodées, un rêve ou une réalité? Dr Ch. Pierre • Corrosion • Protection Cathodique • Critères de Protection Cathodique • L’Anode Alternative au Re-revêtement • Les Développements Futurs ULB, 4 Novembre 2004

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  6. Metal Resistance Used Since Au  Au+ + e- Indefinite 10 000 B.C. Cu  Cu++ + 2e- Resist well 7 000 B.C. Fe  Fe++ + 2e- Little 1 300 B.C. Zn  Zn++ + 2e- Little 1 500 A.D. Na  Na+ + e- Explosive 1 800 A.D. Corrosion and Human History ULB, 4 Novembre 2004

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  8. Every type of corrosion can be explained by differences in either Solid or Liquid phase • Dissimilarity of Solid phase: • Dissimilar metals • Different thermal treatment • Scratches or abrasion • Differential strains • Differential grains and matrix composition • Grain boundaries • Differential grain size • Rough surface • Differential curvature • Dissimilarity of Liquid phase: • Differential electrolyte composition • Differential electrolyte concentration • Differential Oxygen concentration • Temperature differential • Differential electrolyte motion • Differential illumination ULB, 4 Novembre 2004

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  16. Our followed Criteria: ULB, 4 Novembre 2004

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  18. Deep Groundbed Anodes ULB, 4 Novembre 2004

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  21. :is a long-line impressed current anode ULB, 4 Novembre 2004

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  25. - Discrete Impressed Current - Continuous (AnodeFlexTM) - Discrete - Continuous Types of Cathodic Protection Galvanic

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