Cathodic ProtectionCathodic Protection
Presentation on Cathodic Protection System, Presentation on Cathodic Protection System, at IOCL KBPL Kandla.at IOCL KBPL Kandla.Dt. 19.04.2006Dt. 19.04.2006
By By Corrosion MattersCorrosion Matters
HyderabadHyderabadAn Advisory services company.An Advisory services company.
WelcomeWelcome
CORROSIONCORROSION““The deterioration of a material, The deterioration of a material,
usually a metal, that results from a usually a metal, that results from a reaction with its environment.”reaction with its environment.”
TYPICAL CORROSION CELLTYPICAL CORROSION CELL
FORMS OF CORROSIONFORMS OF CORROSION
GENERALGENERAL LOCALIZEDLOCALIZED GALVANICGALVANIC
ENVIRONMENTAL ENVIRONMENTAL CRACKINGCRACKING VELOCITY EFFECTVELOCITY EFFECT INTERGRANULARINTERGRANULAR
DEALLOYINGDEALLOYING FRETTINGFRETTING HIGH-HIGH-TEMPERATURETEMPERATURE
SOME VARIABLES IN THE SOME VARIABLES IN THE CORROSION CONTROL PROCESSCORROSION CONTROL PROCESS
pHpH OXYGENOXYGEN RESISTIVITYRESISTIVITY TEMPERATURETEMPERATURE COATING PROPERTIESCOATING PROPERTIES ELECTROLYTE ELECTROLYTE
MOISTURE CONTENTMOISTURE CONTENT
ANODE MATERIALANODE MATERIAL ANODE LOCATIONANODE LOCATION ANODE SIZEANODE SIZE ANODE SHAPEANODE SHAPE STRUCTURE STRUCTURE
MATERIALMATERIAL BACTERIABACTERIA OTHER MINERALS IN OTHER MINERALS IN
ELECTROLYTEELECTROLYTE
CORROSION CONTROL CORROSION CONTROL MEASURESMEASURES
MATERIALS SELECTIONMATERIALS SELECTION
DESIGN CONSIDERATIONSDESIGN CONSIDERATIONS
PROTECTIVE COATINGS AND LININGSPROTECTIVE COATINGS AND LININGS
CATHODIC PROTECTIONCATHODIC PROTECTION
INHIBITORSINHIBITORS
BASIC CATHODIC BASIC CATHODIC PROTECTIONPROTECTION
BASIC CATHODIC PROTECTION BASIC CATHODIC PROTECTION IIII
SOME CP DESIGN SOME CP DESIGN CONSIDERATIONSCONSIDERATIONS
ELECTROLYTE RESISTIVITYELECTROLYTE RESISTIVITY SYSTEM LIFE REQUIREMENTSSYSTEM LIFE REQUIREMENTS COATING EFFICIENCYCOATING EFFICIENCY CURRENT REQUIRED FOR PROTECTIONCURRENT REQUIRED FOR PROTECTION ECONOMIC FACTORSECONOMIC FACTORS PHYSICAL CONFIGURATION OF PHYSICAL CONFIGURATION OF
STRUCTURE STRUCTURE MATERIALS USED IN STRUCTUREMATERIALS USED IN STRUCTURE.. ANODE CHARACTERISTICSANODE CHARACTERISTICS
CP CONSTRUCTION CP CONSTRUCTION CONSIDERATIONSCONSIDERATIONS
PREPARATION OF METAL SURFACE FOR PREPARATION OF METAL SURFACE FOR COATINGCOATING
PROPER SELECTION AND APPLICATION OF PROPER SELECTION AND APPLICATION OF COATINGCOATING
PROCUREMENT OF CP EQUIPMENT PROCUREMENT OF CP EQUIPMENT MEETING SPECIFICATIONSMEETING SPECIFICATIONS
SUPERVISION OF INSTALLATION BY SUPERVISION OF INSTALLATION BY QUALIFIED PERSONNELQUALIFIED PERSONNEL
ENERGIZING, ADJUSTMENT, AND TESTING ENERGIZING, ADJUSTMENT, AND TESTING BY QUALIFIED PERSONNELBY QUALIFIED PERSONNEL
MAINTENANCE AND REPAIR MAINTENANCE AND REPAIR CONSIDERATIONSCONSIDERATIONS
WEEKLY RECTIFIER READINGS RECORDED WEEKLY RECTIFIER READINGS RECORDED AND SENT TO DISTRICT CP SPECIALIST AND SENT TO DISTRICT CP SPECIALIST FOR REVIEWFOR REVIEW
ANNUAL PROTECTIVE POTENTIAL SURVEY ANNUAL PROTECTIVE POTENTIAL SURVEY PERFORMED BY QUALIFIED PERSONNELPERFORMED BY QUALIFIED PERSONNEL
NECESSARY SYSTEM ADJUSTMENTS MADE NECESSARY SYSTEM ADJUSTMENTS MADE BY QUALIFIED PERSONNELBY QUALIFIED PERSONNEL
NECESSARY REPAIRS MADE AS SOON AS NECESSARY REPAIRS MADE AS SOON AS POSSIBLE AND RETEST IF NECESSARYPOSSIBLE AND RETEST IF NECESSARY
SUMMARYSUMMARY
THERE ARE MANY FORMS AND MECHANISMS THAT CAUSE THERE ARE MANY FORMS AND MECHANISMS THAT CAUSE CORROSION.CORROSION.
PROPER CORROSION CONTROL SAVES MONEY, AND PROPER CORROSION CONTROL SAVES MONEY, AND IMPROVES OPERABILITY AND SAFETY AND PROTECTS THE IMPROVES OPERABILITY AND SAFETY AND PROTECTS THE ENVIRONMENT.ENVIRONMENT.
CATHODIC PROTECTION IS A PROVEN EFFECTIVE METHOD CATHODIC PROTECTION IS A PROVEN EFFECTIVE METHOD OF CORROSION CONTROL.OF CORROSION CONTROL.
CORROSION CONTROL IS COMPLEX, REQUIRING SPECIAL CORROSION CONTROL IS COMPLEX, REQUIRING SPECIAL EXPERTISE FOR SUCCESSFUL DESIGN, CONSTRUCTION, EXPERTISE FOR SUCCESSFUL DESIGN, CONSTRUCTION, AND MAINTENANCEAND MAINTENANCE
Sketch for CP SystemSketch for CP System
CP System for Existing Buried CP System for Existing Buried LinesLines
CP Station for PipelinesCP Station for Pipelines
Anode Junction BoxAnode Junction Box
Deepwell Anode GroundbedDeepwell Anode Groundbed
Indoor Type RectifierIndoor Type Rectifier
Outdoor Type RectifierOutdoor Type Rectifier
Hi Silicon Chromium AnodesHi Silicon Chromium Anodes
Titanium Rod Type AnodeTitanium Rod Type Anode
Sacrificial Anode - MgSacrificial Anode - Mg
Mg. Anodes with tail cablesMg. Anodes with tail cables
Bullet Tanks CP SystemBullet Tanks CP System
Measurement of PotentialsMeasurement of Potentials
Railcrossings CP SystemRailcrossings CP System
Survey for Stray current CPSurvey for Stray current CP
Graphical presentation of DataGraphical presentation of Data
Data Logging Readings taken on Nov 7,05
0.510
0.520
0.530
0.540
0.550
0.560
0.570
0.580
0.590
19.42 19.43 19.44 19.45 19.46 19.47 19.48 19.49 19.50 19.51 19.52 19.53 19.54 19.55 19.56 19.57 19.58 19.59 20.00 20.01
Minutes
PS
P in
vo
lts
(-v
e)
Average PSP readings
Pourbix Diagram for Corrosion Pourbix Diagram for Corrosion PhenomenonPhenomenon
Temporary System for Current Temporary System for Current RequirementRequirement
End.End.
Thank YouThank You
We also make Electro Chlorination SystemsWe also make Electro Chlorination Systems