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1. CA2423116 - DOUBLY-PROTECTED REINFORCING MEMBERS IN CONCRETE

Office
Canada
Application Number 2423116
Application Date 19.09.2001
Publication Number 2423116
Publication Date 28.03.2002
Grant Number
Grant Date 03.06.2008
Publication Kind C
IPC
C23F 13/04
CCHEMISTRY; METALLURGY
23COATING 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
FNON-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
13Inhibiting corrosion of metals by anodic or cathodic protection
02cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
04Controlling or regulating desired parameters
C23F 13/10
CCHEMISTRY; METALLURGY
23COATING 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
FNON-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
13Inhibiting corrosion of metals by anodic or cathodic protection
02cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
06Constructional parts, or assemblies of cathodic-protection apparatus
08Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
10Electrodes characterised by the structure
C23F 13/20
CCHEMISTRY; METALLURGY
23COATING 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
FNON-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
13Inhibiting corrosion of metals by anodic or cathodic protection
02cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
06Constructional parts, or assemblies of cathodic-protection apparatus
08Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
20Conducting electric current to electrodes
E04C 5/01
EFIXED CONSTRUCTIONS
04BUILDING
CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
5Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
01Reinforcing elements of metal, e.g. with non-structural coatings
G01N 17/02
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
17Investigating resistance of materials to the weather, to corrosion or to light
02Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
CPC
G01N 17/02
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
17Investigating resistance of materials to the weather, to corrosion, or to light
02Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
C23F 13/04
CCHEMISTRY; METALLURGY
23COATING 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
FNON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE
13Inhibiting corrosion of metals by anodic or cathodic protection
02cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
04Controlling or regulating desired parameters
C23F 2201/02
CCHEMISTRY; METALLURGY
23COATING 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
FNON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE
2201Type of materials to be protected by cathodic protection
02Concrete, e.g. reinforced
Applicants COR/SCI LLC
Inventors LYUBLINSKI, EFIM YA
Priority Data 09663958 19.09.2000 US
Title
(EN) DOUBLY-PROTECTED REINFORCING MEMBERS IN CONCRETE
(FR) ELEMENTS D'ARMATURE DOUBLEMENT PROTEGES DANS DU BETON
Abstract
(EN)
A concrete structure (11) is reinforced with steel rebars (12) coated with essentially pure aluminum (15) upon which aluminum coating is an aluminum oxide layer (15'). This layer of aluminum oxide is in direct contact with the concrete. The Al-coated rebars may be protected in a galvanic circuit using magnesium or other metal baser as a sacrificial anode, or the rebars are cathodically protected with an impressed cathodic current, the current density of which is derived by sensing the corrosion potential at a sensing member of essentially pure aluminum embedded in the concrete, or in concrete outside a zone immediately surrounding the rebars, measuring the corrosion potential at the sensing member relative to a reference electrode until the value stabilizes at a measured stable potential; then an impressed current lower than the corrosion potential of the sensing member is imposed.