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51315-6016-Corrosion Protection of Storage Tank Soil Side Bottoms—Application Experience

Product Number: 51315-6016-SG
ISBN: 6016 2015 CP
Author: Efim Lyublinski
Publication Date: 2015
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Prof. Efim Lyublinski1 Kelly Baker1 Eng. Terry Natale1 Dr. Monique Posner1Eng. Gautam Ramdas1 Eng. Wade Rohland1 Eng. Alexander Roytman1Eng. Yefim Vaks1 Dr. Stephen Woessner11Northern Technologies International CorporationZerust Oil & Gas23205 Mercantile RoadBeachwood OH 44122 USAEng. Marcelo Schultz22Petrobras BrazilABSTRACTCorrosion of soil side bottoms is unpredictable and can be up to 5 mm/year. The soil side bottom cannot be protected while the tank is in service. The well-known cathodic protection system is not efficient enough. This paper presents case studies of soil side bottom corrosion protection using new systems with volatile and soluble corrosion inhibitors installed on new and existing soil side and double bottom aboveground storage tanks. This paper describes field trial and application experience of principally new corrosion protection systems for different designs of storage tank foundations. The new system demonstrates corrosion protection efficiencies as high as 70-90% and also decreases the absence of pitting corrosion in most aggressive environment conditions. The application experience has shown that inhibitor use can increase the tank service life approximately 3-5 times. It reduces the maintenance and replacement costs. This paper also presents the results of decreasing the concentration of chloride from the soil side bottom to decrease the corrosiveness of the environment and increase efficiency of the inhibitors. In the future this technology can decrease the required protection concentration of inhibitors or decrease the frequency of inhibitor replacement.Key words: tank bottom soil oil gas environment corrosion inhibitor protection
Prof. Efim Lyublinski1 Kelly Baker1 Eng. Terry Natale1 Dr. Monique Posner1Eng. Gautam Ramdas1 Eng. Wade Rohland1 Eng. Alexander Roytman1Eng. Yefim Vaks1 Dr. Stephen Woessner11Northern Technologies International CorporationZerust Oil & Gas23205 Mercantile RoadBeachwood OH 44122 USAEng. Marcelo Schultz22Petrobras BrazilABSTRACTCorrosion of soil side bottoms is unpredictable and can be up to 5 mm/year. The soil side bottom cannot be protected while the tank is in service. The well-known cathodic protection system is not efficient enough. This paper presents case studies of soil side bottom corrosion protection using new systems with volatile and soluble corrosion inhibitors installed on new and existing soil side and double bottom aboveground storage tanks. This paper describes field trial and application experience of principally new corrosion protection systems for different designs of storage tank foundations. The new system demonstrates corrosion protection efficiencies as high as 70-90% and also decreases the absence of pitting corrosion in most aggressive environment conditions. The application experience has shown that inhibitor use can increase the tank service life approximately 3-5 times. It reduces the maintenance and replacement costs. This paper also presents the results of decreasing the concentration of chloride from the soil side bottom to decrease the corrosiveness of the environment and increase efficiency of the inhibitors. In the future this technology can decrease the required protection concentration of inhibitors or decrease the frequency of inhibitor replacement.Key words: tank bottom soil oil gas environment corrosion inhibitor protection
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