Medium for local CO2-corrosion laboratory testing
https://doi.org/10.31615/j.corros.prot.2021.102.4-1
Abstract
The results of laboratory experiments are presented, in which the essential features of corrosion processes occurring in real oilfield systems are simulated, namely, a high rate of local corrosion, exceeding the corrosion rate by 2…9 times. A standard environment and conditions for laboratory experiments are proposed, which make it possible to reproduce visible and measured with a needle micrometer (> 0,01 mm) local corrosion damage on coupons of corrosion control by the gravimetric method. The protective effect of corrosion inhibitors in relation to local carbon dioxide corrosion at the selected dosage is proposed to be assessed not by the magnitude of the protective effect, but by the presence or absence of local corrosion on the coupons of corrosion control by the gravimetric method after the end of the test. It is shown that with a high protective effect of corrosion inhibitors in relation to corrosion rate, there may b e no protective effect in relation to local corrosion.
About the Authors
V. E. Tkacheva
LLC «RN-BashNIPIneft»
Russian Federation
Russian Federation
Valeriya E. Tkacheva, Ph.D. in Technical Sciences, Readership, complication department
12, Sochinskaya str., Ufa
A. N. Markin
Industrial University of Tyumen, a branch in Nizhnevartovsk
Russian Federation
Russian Federation
Andrey N. Markin, Ph.D. in Technical Sciences, assistant Professor at the Dept. of Oilfield Ingineering
2/П, bld. 9, Lenin str., Panel 20, Khanty-Mansi Autonomous territory − Yugra, Nizhnevartovsk
References
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Review
For citations:
Tkacheva V.E., Markin A.N. Medium for local CO2-corrosion laboratory testing. Theory and Practice of Corrosion Protection. 2021;26(4):7-17. (In Russ.) https://doi.org/10.31615/j.corros.prot.2021.102.4-1
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