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Showing papers in "Corrosion & Protection in Petrochemical Industry in 2012"


Journal Article
TL;DR: In this article, anode cathodic protection unit was installed for the electric pump train and oil pipe, which is simple in process, easy in installation, high in corrosion prevention performance and little in harm to the soil.
Abstract: The ESP wells in Wenliu Oil Area of SINOPEC Zhongyuan Oil Field Company corroded seriously,and the number of ESP wells with corrosion of Grade IV and plus accounted to 22.9% of the total.When corrosion inhibitor was used for electric pump train,the corrosion prevention result was poor in corrosive locations because of being incapable of performing pre-filming treatment.When sacrificing anode cathodic protection unit was installed for the electric pump train,the electric pump train and oil pipe were no longer corroded.The electric-chemical corrosion only occurred when the active metals were consumed.Good corrosion prevention can be achieved by integrated application of corrosion inhibitor and cathodic protection because the corrosion inhibitor provides a balanced corrosion protection for electric pump train and sacrificing anode cathodic protection offers a concentrated corrosion protection for oil pipes.The sacrificing anode cathodic protection unit,which is simple in process,easy in installation,high in corrosion prevention performance and little in harm to the soil,can effective reduce the electric-chemical corrosion of well liquid on electric pump train and oil pipes and extend their service life.

1 citations


Journal Article
TL;DR: In this paper, a corrosion evaluation of 5 common steels in petroleum refining industry was performed to provide basis for the good design, proper material selection, effective corrosion protection and development of new materials for refinery process units.
Abstract: The corrosion evaluation of 5 common steels in petroleum refining industry was performed to provide basis for the good design,proper material selection,effective corrosion protection and development of new materials for refinery process units.Constant load testing method was applied to study the SSCC resistance performance of these 5 materials in NACE saturated hydrogen sulfide solution.The result of test shows that,in NACE saturated hydrogen sulfide solution,the CF62's and 0Cr13's threshold stress value of resistance to SSCC is lower than 0.75 times of yield strength.16MnR's threshold stress value of resistance to SSCC is equal to or greater than 0.75 times of yield strength but lower that 0.95 times of yield of strength.The 0Cr18Ni9Ti's and 316L's threshold stress value of resistance to SSCC is greater than or equal to 0.95 times of yield strength.The order of threshold stress value of resistance to SSCC of different materials(from low to high) is 0Cr13,16MnR,0Cr18Ni10Ti and 316L.To ensure a long-term reliable operation of refinery process units,the materials with high resistance to SSCC,such as 316L and 0Cr18Ni10Ti,should be preferably selected.The material with low resistance to SSCC,such as 0Cr13 and CF62,should be selected with care.

1 citations


Journal Article
TL;DR: The results showed that the corrosion of crude oil from Penglai 19-3 Well increases with temperature at a range between 260 and 330℃, and molecular weight of naphthenic acid is high in 450~524Ω distillate oil and corrosion is relatively weak at 260~300℩ temperature as mentioned in this paper.
Abstract: Naphthenic acid and distillate corrosions of crude oil from Penglai 19-3 Well were studied by static coupon weight loss testThe naphthenic acid corrosion of vacuum distillation tower in crude distillation Unit in CNOOC Huizhou Refining was also analyzed based upon the results of corrosion investigation during the maintenance and replacement injection additivesThe results show that the corrosion of crude oil from Penglai 19-3 Well increases with temperature at a range between 260 and 330℃,and molecular weight of naphthenic acid is high in 450~524℃ distillate oil and corrosion is relatively weak at 260~300℃ temperature

1 citations