Experimental Study on Corrosion Characteristics of CO2 Pipeline for Offshore Transport and Geological Storage

Abstract

Among the technologies, CCS (Carbon dioxide capture and storage) technology is assumed and arising as crucial technology for reducing anthropogenic carbon dioxide and bridging to hydrogen economy. CCS technology includes carbon dioxide capture on the large point source, transport of captured carbon dioxide stream and storage of carbon into safe geological formations. Among the CCS processes, capture side is developing with many demonstration projects, focusing on the efficiency improvement of wet and dry absorbents, material improvement for membrane, construction cost down, etc. But in transport side, the technology is in the initial stage. In Korea, site surveys are mainly focused and operated on the offshore saline aquifers in the east sea of Korea and rather few surveys are processed in the on land side. For the offshore carbon dioxide geological storage, there are two options for transportation, using pipeline or ship. To utilize the offshore pipeline it is possible to use high chrome steel alloy to response to seawater corrosion, though the cost for construction might take huge budget for installation mainly cause of material cost. Otherwise, we considered it might be possible to apply the anti-corrosion coating outside of the carbon steel pipeline to mitigate seawater corrosion and to reduce the cost, so to secure steady and robust operation of offshore carbon dioxide transportation with little concern of corroure on the large point source, transport of captured carbon dioxide stream and storage of carbon into safe geological formations. Among the CCS processes, capture side is developing with many demonstration projects, focusing on the efficiency improvement of wet and dry absorbents, material improvement for membrane, construction cost down, etc. But in transport side, the technology is in the initial stage. In Korea, site surveys are mainly focused and operated on the offshore saline aquifers in the east sea of Korea and rather few surveys are processed in the on land side. For the offshore carbon dioxide geological storage, there are two options for transportation, using pipeline or ship. To utilize the offshore pipeline it is possible to use high chrome steel alloy to response to seawater corrosion, though the cost for construction might take huge budget for installation mainly cause of material cost. Otherwise, we considered it might be possible to apply the anti-corrosion coating outside of the carbon steel pipeline to mitigate seawater corrosion and to reduce the cost, so to secure steady and robust operation of offshore carbon dioxide transportation with little concern of corro