Логин:
Пароль:
Регистрация
Забыли свой пароль?

Effect of solids precipitation and deposition of corrosion products on the protective ability of inhibitors

Authors: A.T. Faritov, L.P. Khudiakova, Yu.G. Rogdestvenskiy, А.А. Shestakov (GUP IPTER, RF, Ufa), S.N.Vagaytsev, A.V. Paripsky, M.F. Galiullin (Samotlorneftegaz JSC, RF, Nizhnevartovsk)

Key words: inhibition, internal corrosion, sediments and suspended solids.

The article presents of experimental determined quantitative loss of corrosion inhibitor as a result of adsorption on suspended particles of sand, calcite, clay and iron sulfide. The last two are particularly dangerous: clay can reduce the concentration of reagent in the solution at a concentration comparable to that of its, iron sulfide - the concentration of up to 20 times greater than self. Precipitation solids and sediments of the corrosion products lead to the formation of a potential difference between the surfaces of the metal under the deposition and without deposits. On the basis of experiments it is shown that when there is insufficient inhibition of metal deposition galvanic effect occurs. This effect can lead to accelerated corrosion of metal under the sediment. Thus, to improve the effectiveness of inhibitors should be cleaned pipes or choose inhibitors are able to penetrate through the sediments on the metal.
References
1. Laptev A.G., Basharov M.M., Farakhova A.I., Nauchnyy zhurnal KubGAU -
Scientific Journal of KubSAU, 2011, no. 68(04), pp. 147-177.
2. Zav'yalov V.V., Problemy ekspluatatsionnoy nadezhnosti truboprovodov na
pozdney stadii razrabotki mestorozhdeniy (Pipelines operational reliability
problems at a later stage of field development), Moscow: Publ. of VNIIOENG,
2005, 332 p.
3. Markin A.N., Nizamov R.E., Sukhoverkhov S.V., Neftepromyslovaya khimiya:
prakticheskoe rukovodstvo (Oilfield chemistry: a practical guide), Vladivostok:
Dal'nauka Publ., 2011, p. 288.
4. Huang J., Brown B., Jiang X., Kinsella B., Nesic S., Internal CO2 corrosion of
mild steel pipelines under inert solid deposits, NACE Corrosion 2010 Conference
@ Expo, paper no. 10379.
5. Nyborg R., Foss M., Experience with an under deposit corrosion test method
with galvanic current measurement, NACE, Corrosion 2011 Coference @
Expo, paper no. 11259.
6. Hinds G., Turnbull A., Novel multi-electrode test method for evaluating inhibition
of underdeposit corrosion, Part 1: Sweet conditions, CORROSION,
2010, V. 66, no. 4.
7. Suraj T., Techniques to analyze underdeposit corrosion, Department of Materials Science and Engineering, Case Western Reserve University, August, 2010, p. 151.

Key words: inhibition, internal corrosion, sediments and suspended solids.

The article presents of experimental determined quantitative loss of corrosion inhibitor as a result of adsorption on suspended particles of sand, calcite, clay and iron sulfide. The last two are particularly dangerous: clay can reduce the concentration of reagent in the solution at a concentration comparable to that of its, iron sulfide - the concentration of up to 20 times greater than self. Precipitation solids and sediments of the corrosion products lead to the formation of a potential difference between the surfaces of the metal under the deposition and without deposits. On the basis of experiments it is shown that when there is insufficient inhibition of metal deposition galvanic effect occurs. This effect can lead to accelerated corrosion of metal under the sediment. Thus, to improve the effectiveness of inhibitors should be cleaned pipes or choose inhibitors are able to penetrate through the sediments on the metal.
References
1. Laptev A.G., Basharov M.M., Farakhova A.I., Nauchnyy zhurnal KubGAU -
Scientific Journal of KubSAU, 2011, no. 68(04), pp. 147-177.
2. Zav'yalov V.V., Problemy ekspluatatsionnoy nadezhnosti truboprovodov na
pozdney stadii razrabotki mestorozhdeniy (Pipelines operational reliability
problems at a later stage of field development), Moscow: Publ. of VNIIOENG,
2005, 332 p.
3. Markin A.N., Nizamov R.E., Sukhoverkhov S.V., Neftepromyslovaya khimiya:
prakticheskoe rukovodstvo (Oilfield chemistry: a practical guide), Vladivostok:
Dal'nauka Publ., 2011, p. 288.
4. Huang J., Brown B., Jiang X., Kinsella B., Nesic S., Internal CO2 corrosion of
mild steel pipelines under inert solid deposits, NACE Corrosion 2010 Conference
@ Expo, paper no. 10379.
5. Nyborg R., Foss M., Experience with an under deposit corrosion test method
with galvanic current measurement, NACE, Corrosion 2011 Coference @
Expo, paper no. 11259.
6. Hinds G., Turnbull A., Novel multi-electrode test method for evaluating inhibition
of underdeposit corrosion, Part 1: Sweet conditions, CORROSION,
2010, V. 66, no. 4.
7. Suraj T., Techniques to analyze underdeposit corrosion, Department of Materials Science and Engineering, Case Western Reserve University, August, 2010, p. 151.


Attention!
To buy the complete text of article (a format - PDF) or to read the material which is in open access only the authorized visitors of the website can. .

Mobile applications

Read our magazine on mobile devices

Загрузить в Google play

Press Releases

03.03.2021
25.02.2021
16.02.2021