La réhabilitation « In Situ » de structures métalliques enterrées fortement corrodées, un rêve ou une réalité? Corrosion Protection Cathodique LAnode Alternative.

La réhabilitation « In Situ » de structures

métalliques enterrées fortement corrodées,

un rêve ou une réalité?

Corrosion

Protection Cathodique

L’Anode Alternative au Re-revêtement

Critères de Protection Cathodique

Les Développements Futurs

Dr Ch. Pierre

ULB, 4 Novembre 2004





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



Every type of corrosion can be explained by differences

in either Solid or Liquid phase

• Dissimilarity of Solid phaseDissimilarity of Solid phase::

• Dissimilarity of Liquid phaseDissimilarity of Liquid 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

Differential electrolyte composition Differential electrolyte concentration Differential Oxygen concentration Temperature differential Differential electrolyte motion Differential illumination










Our followed Criteria:


Deep Groundbed Anodes




:is a long-line impressed current anode





Types of Cathodic Protection

Galvanic

- Discrete

- Continuous (AnodeFlexTM)

- Discrete

- Continuous

Impressed Current

La réhabilitation « In Situ » de structures métalliques enterrées fortement corrodées, un rêve ou une réalité? Corrosion Protection Cathodique LAnode Alternative.

Documents

impressed current anodes

pierre ulb

deep groundbed anodes

current anode ulb

massive anodes

e little1

ferrite composite anodes

human history ulb