cathodic protection presentation on cathodic protection system, at iocl kbpl kandla. dt. 19.04.2006...
TRANSCRIPT
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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.
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WelcomeWelcome
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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.”
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TYPICAL CORROSION CELLTYPICAL CORROSION CELL
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FORMS OF CORROSIONFORMS OF CORROSION
GENERALGENERAL LOCALIZEDLOCALIZED GALVANICGALVANIC
ENVIRONMENTAL ENVIRONMENTAL CRACKINGCRACKING VELOCITY EFFECTVELOCITY EFFECT INTERGRANULARINTERGRANULAR
DEALLOYINGDEALLOYING FRETTINGFRETTING HIGH-HIGH-TEMPERATURETEMPERATURE
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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
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CORROSION CONTROL CORROSION CONTROL MEASURESMEASURES
MATERIALS SELECTIONMATERIALS SELECTION
DESIGN CONSIDERATIONSDESIGN CONSIDERATIONS
PROTECTIVE COATINGS AND LININGSPROTECTIVE COATINGS AND LININGS
CATHODIC PROTECTIONCATHODIC PROTECTION
INHIBITORSINHIBITORS
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BASIC CATHODIC BASIC CATHODIC PROTECTIONPROTECTION
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BASIC CATHODIC PROTECTION BASIC CATHODIC PROTECTION IIII
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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
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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
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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
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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
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Sketch for CP SystemSketch for CP System
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CP System for Existing Buried CP System for Existing Buried LinesLines
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CP Station for PipelinesCP Station for Pipelines
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Anode Junction BoxAnode Junction Box
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Deepwell Anode GroundbedDeepwell Anode Groundbed
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Indoor Type RectifierIndoor Type Rectifier
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Outdoor Type RectifierOutdoor Type Rectifier
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Hi Silicon Chromium AnodesHi Silicon Chromium Anodes
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Titanium Rod Type AnodeTitanium Rod Type Anode
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Sacrificial Anode - MgSacrificial Anode - Mg
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Mg. Anodes with tail cablesMg. Anodes with tail cables
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Bullet Tanks CP SystemBullet Tanks CP System
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Measurement of PotentialsMeasurement of Potentials
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Railcrossings CP SystemRailcrossings CP System
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Survey for Stray current CPSurvey for Stray current CP
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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
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Pourbix Diagram for Corrosion Pourbix Diagram for Corrosion PhenomenonPhenomenon
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Temporary System for Current Temporary System for Current RequirementRequirement
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End.End.
Thank YouThank You
We also make Electro Chlorination SystemsWe also make Electro Chlorination Systems