cathodic protection application on offshore structures
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CATHODIC PROTECTION APPLICATION ON OFFSHORE STRUCTURES
by Dedy Iskandar
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AgendaWhat is corrosionBasic concept of cathodic protectionCathodic protection applicationField measurement cathodic protection
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Corrosion is the deterioration of a material, usually a metal, because of a reaction with its environment.
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Basic conceptMaterials Selection Galvanic Series Magnesium Most ActiveZincAluminumMild SteelCast IronCopperStainless SteelSilverGold Platinum Least Active
Cathodic protection by sacrificial anodeCathodic protection by Impress Current
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Cathodic Protection Application on Offshore StructuresSacrificial anode installedNo Sacrificial anode installed
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Cathodic Protection Application on Offshore StructuresBasis of Design StandardApplicable industry standardsDNV-RP-B401-2005: Cathodic Protection Design NACE RP0176: Corrosion Control of Steel Fixed Offshore Structures
Applicable BP SpecificationsGP 06-31 : Guidance on Practice for Cathodic Protection GP 06-311 : Guidance on Practice for Procurement of Cathodic Protection Goods and Services
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Cathodic Protection Application on Offshore Structures - PipelineSled anode dan Clamp for upgrade the wastage anode on subsea pipeline Rigid SledSemi-Rigid Sled
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Cathodic Protection Application on Offshore Structures - PipelineRigid Anode Sled Deployment
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Cathodic Protection Application on Offshore Structures - LegRetroPod and Clamp for upgrade the wastage anode on leg of platform
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Cathodic Protection Application on Offshore StructuresCP-Mat and RetroLink options for Caissons and other minimal structures
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Advantage & Disadvantage of Sacrficial Anode ICCP (Impress Current Cathodic Protection)Sacrificial AnodeThe advantages are :The disadvantage are :ICCPThe advantages are :The disadvantage are :
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Field measurement cathodic protection
To measurement level of protection the structures we have to using reference cells.- Cu/CUSO4 (Copper/Copper sulfate) for Soil environment - Ag/AgCl (Silver/Silver Chloride) for sea water environment
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Field measurement cathodic protectionLevel of Protection
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Field measurement cathodic protectionMeasurement level protection on the offshore structure method:- Drop Cell Survey- CP Snake Survey- ROV ( Robotic Operation Vehicle)
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Field measurement cathodic protection
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Thank you..