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1. (WO1991009155) NOVEL ELECTRODES AND CATHODIC PROTECTION SYSTEM
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/009155 International Application No.: PCT/EP1990/002218
Publication Date: 27.06.1991 International Filing Date: 17.12.1990
IPC:
C23F 13/16 (2006.01)
C CHEMISTRY; METALLURGY
23
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
F
NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACES; INHIBITING CORROSION OF METALLIC MATERIAL; INHIBITING INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25247
13
Inhibiting corrosion of metals by anodic or cathodic protection
02
cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
06
Constructional parts, or assemblies of cathodic-protection apparatus
08
Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
16
Electrodes characterised by the combination of the structure and the material
Applicants:
ORONZIO DE NORA S.A. [--/CH]; Coge-Fidam Via Canevascini, 26 CH-6900 Lugano, CH (AllExceptUS)
MUSSINELLI, Gian, Luigi [--/IT]; IT (UsOnly)
Inventors:
MUSSINELLI, Gian, Luigi; IT
Agent:
KINZEBACH, Werner ; Kinzebach & Partner Postfach 86 06 49 D-8000 München 86, DE
Priority Data:
452,56118.12.1989US
Title (EN) NOVEL ELECTRODES AND CATHODIC PROTECTION SYSTEM
(FR) NOUVELLES ELECTRODES ET NOUVEAU SYSTEME DE PROTECTION CATHODIQUE
Abstract:
(EN) A grid electrode having a tailored surface for cathodic protection of steel rebar reinforced concrete structures comprising a plurality of valve metal strips having voids and optionally valve metal strips without voids, said strips having an electrocatalytic surface and being disposed on the surface of the concrete structure, connected together to form the grid electrode, the ratio of grid electrode surface to the steel surface density being suitably selected to maintain a uniform cathodic protection current density throughout the concrete structure avoiding underprotection and/or overprotection areas. The present invention further discloses the method for forming said grid electrode onto the structure to be cathodically protected, covering the grid electrode with an ion conductive overlay and the structure prepared thereby.
(FR) L'électrode de grille décrite, qui présente une surface spécialement adaptée pour assurer la protection cathodique de structures en béton armé à barres nervurées en acier, comprend plusieurs bandes métalliques à valves avec des vides et éventuellement des bandes métalliques à valves sans vides. Ces bandes comportent une surface électrocatalytique et sont disposées sur la surface de la structure en béton de façon à être reliées entre elles pour former l'électrode de grille. Le rapport entre la densité surfacique de l'électrode et celle de l'acier est correctement sélectionné pour assurer le maintien d'une densité de courant de protection cathodique uniforme sur toute la surface de la structure en béton, pour éviter la formation de zones de surprotection et/ou de sousprotection. La présente invention décrit en outre un procédé permettant de former cette électrode de grille sur la structure devant recevoir une protection cathodique et permettant de recouvrir l'électrode de grille d'une couche de revêtement à conduction ionique, ainsi que la structure ainsi préparée.
Designated States: AU, BB, BG, BR, CA, FI, HU, JP, KP, KR, LK, MC, MG, MW, NO, RO, SD, SU, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CM, GA, ML, MR, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
FI913878NO19913222EP0458951JPH05500393AU1991070468