Edkarlla Sousa Dantas de Oliveira **e-mail: edkarllaquimica@hotmail.com
Universidade Federal de Pernambuco, Departamento de Engenharia Mecânica, Av. Prof. Moraes Rego, 1235, Cidade Universitária, 50670-901, Recife, PE, BrasilUniversidade Federal de PernambucoBrasilRecife, PE, BrasilUniversidade Federal de Pernambuco, Departamento de Engenharia Mecânica, Av. Prof. Moraes Rego, 1235, Cidade Universitária, 50670-901, Recife, PE, Brasil
Universidade Federal de Pernambuco, Departamento de Engenharia Mecânica, Av. Prof. Moraes Rego, 1235, Cidade Universitária, 50670-901, Recife, PE, BrasilUniversidade Federal de PernambucoBrasilRecife, PE, BrasilUniversidade Federal de Pernambuco, Departamento de Engenharia Mecânica, Av. Prof. Moraes Rego, 1235, Cidade Universitária, 50670-901, Recife, PE, Brasil
Universidade Federal de Pernambuco, Departamento de Engenharia Química, Av. Prof. Arthur Sá s/n, Cidade Universitária, 50740-521, Recife, PE, BrasilUniversidade Federal de PernambucoBrasilRecife, PE, BrasilUniversidade Federal de Pernambuco, Departamento de Engenharia Química, Av. Prof. Arthur Sá s/n, Cidade Universitária, 50740-521, Recife, PE, Brasil
Severino Leopoldino Urtiga Filho
Universidade Federal de Pernambuco, Departamento de Engenharia Mecânica, Av. Prof. Moraes Rego, 1235, Cidade Universitária, 50670-901, Recife, PE, BrasilUniversidade Federal de PernambucoBrasilRecife, PE, BrasilUniversidade Federal de Pernambuco, Departamento de Engenharia Mecânica, Av. Prof. Moraes Rego, 1235, Cidade Universitária, 50670-901, Recife, PE, Brasil
Universidade Federal de Pernambuco, Departamento de Engenharia Mecânica, Av. Prof. Moraes Rego, 1235, Cidade Universitária, 50670-901, Recife, PE, BrasilUniversidade Federal de PernambucoBrasilRecife, PE, BrasilUniversidade Federal de Pernambuco, Departamento de Engenharia Mecânica, Av. Prof. Moraes Rego, 1235, Cidade Universitária, 50670-901, Recife, PE, Brasil
Universidade Federal de Pernambuco, Departamento de Engenharia Química, Av. Prof. Arthur Sá s/n, Cidade Universitária, 50740-521, Recife, PE, BrasilUniversidade Federal de PernambucoBrasilRecife, PE, BrasilUniversidade Federal de Pernambuco, Departamento de Engenharia Química, Av. Prof. Arthur Sá s/n, Cidade Universitária, 50740-521, Recife, PE, Brasil
Figure 6
Circuits models used to fit for the EIS data (A) single layer circuit R(RC) for 3.5 wt% NaCl system and (B) double layer circuit for abiotic and biotic system R(C(R(RC))).
Figure 7
Micrographs of the films formed on the surface of API 5L X80 steel coupons after 15 days of exposure to the (a) 3.5 wt% NaCl, (b) abiotic and (c) biotic systems.
Figure 8
Micrographs of the surface of the API 5L X80 steel coupons after the removal of the films in the (a) 3.5 wt% NaCl, (b) abiotic and (c) biotic systems.
imageFigure 1
Variation of the open circuit potential in the 3.5 wt% NaCl, abiotic and biotic systems.
open_in_new
imageFigure 2
Polarization curves of API 5L X80 steel exposed to 3.5 wt% NaCl, abiotic and biotic systems.
open_in_new
imageFigure 3
EIS results for API 5L X80 steel in 3.5 wt% NaCl system. In (a) Nyquist plot and (b) Bode phase.
open_in_new
imageFigure 4
EIS results for API 5L X80 steel in abiotic system. In (a) Nyquist plot and (b) Bode phase.
open_in_new
imageFigure 5
EIS results for API 5L X80 steel in biotic system. In (a) Nyquist plot and (b) Bode phase.
open_in_new
imageFigure 6
Circuits models used to fit for the EIS data (A) single layer circuit R(RC) for 3.5 wt% NaCl system and (B) double layer circuit for abiotic and biotic system R(C(R(RC))).
open_in_new
imageFigure 7
Micrographs of the films formed on the surface of API 5L X80 steel coupons after 15 days of exposure to the (a) 3.5 wt% NaCl, (b) abiotic and (c) biotic systems.
open_in_new
imageFigure 8
Micrographs of the surface of the API 5L X80 steel coupons after the removal of the films in the (a) 3.5 wt% NaCl, (b) abiotic and (c) biotic systems.
open_in_new
table_chartTable 1
Physical-chemical parameters of produced water.
Parameters
pH
SO4-2 (mg/L)
S-2 (mg/L)
NO3-(mg/L)
Cl- (mg/L)
Salinity (mg/L)
Fe (mg/L)
Oil and grease (mg/L)
TDS(a)(a)
Total Dissolved Solids;
(mg/L)
TSS(b)(a)
Total Dissolved Solids;
(mg/L)
Results
6.8
230.0
0.6
0.4
56.2
88.7
5.7
79.0
76.8
239.0
table_chartTable 2
Microorganisms in the produced water 15.
Groups of microorganisms
Total aerobic
Total anaerobic
Acid-producing aerobic
Acid-producing anaerobic
Precipitating iron bacteria
Sulfate-reducing bacteria
Cell concentration
1.2 x 104 (CFU/mL)
1.1 x 103 (MPN/mL)
7.0 x 10 (MPN/mL)
2.5 x 102 (MPN/mL)
Undetected
4.5 x 103 (MPN/mL)
table_chartTable 3
Adjusted electrochemical parameters of the EIE measurements for the 3.5 wt% NaCl system.
Time (h)
Rs (Ω cm2)
Rct (Ω cm2)
Yct (Ω-1 cm-2 s-n)
nct
24
5.12
1.16 x 103
481 x 10-6
0.435
48
6.10
1.32 x 103
148 x 10-6
0.359
72
4.95
2.61 x 103
672 x 10-6
0.783
192
7.21
1.29 x 103
4.86 x 10-3
0.414
360
4.82
1.44 x 103
3.11 x 10-3
0.432
720
1.75
1.88 x 103
4.22 x 10-3
0.774
1080
9.87
1.37 x 103
1.49 x 10-3
0.589
1440
3.75
3.32 x 103
1.68 x 10-3
0.298
table_chartTable 4
Adjusted electrochemical parameters of the EIE measurements for the abiotic system.
Time (h)
Rs (Ω cm2)
Rf (Ω cm2)
Yf (Ω-1 cm-2 s-n)
nf
Rct (Ω cm2)
Yct (Ω-1 cm-2 s-n)
nct
24
3.22
1.96 x 103
155 x 10-6
0.864
1.58 x 103
430 x 10-6
0.250
48
3.78
2.47 x 103
189 x 10-6
0.857
1.60 x 103
192 x 10-6
0.347
72
3.96
2.79 x 103
111 x 10-6
0.671
1.76 x 103
159 x 10-6
0.895
192
4.68
5.15 x 103
690 x 10-6
0.754
2.13 x 103
387 x 10-6
0.435
360
4.01
5.51 x 103
181 x 10-6
0.967
2.25 x 103
852 x 10-6
0.732
720
6.08
6.08 x 103
794 x 10-6
0.837
3.39 x 103
1.84 x 10-3
0.741
1080
7.67
5.63 x 103
1.15 x 10-3
0.824
3.19 x 103
3.14 x 10-3
0.685
1440
4.06
6.19 x 103
3.58 x 10-3
0.725
4.57 x 103
4.59 x 10-3
0.812
table_chartTable 5
Adjusted electrochemical parameters of the EIE measurements for the biotic system.
Time (h)
Rs (Ω cm2)
Rb (Ω cm2)
Yb (Ω-1 cm-2 s-n)
nb
Rct (Ω cm2)
Yct (Ω-1 cm-2 s-n)
nct
24
1.88
3.97 x 103
282 x 10-6
0.871
3.05 x 103
695 x 10-6
0.811
48
2.67
2.54 x 103
260 x 10-6
0.873
2.81 x 103
2.45 x 10-3
0.374
72
2.42
2.19 x 103
340 x 10-6
0.905
2.63 x 103
2.73 x 10-3
0.462
192
2.46
4.27 x 103
370 x 10-6
0.933
3.17 x 103
742 x 10-6
0.705
360
2.56
4.91 x 103
928 x 10-6
0.879
3.31 x 103
1.02 x 10-3
0.243
720
2.41
7.62 x 103
1.60 x 10-3
0.915
6.34 x 103
1.52 x 10-3
0.719
1080
3.23
6.27 x 103
3.15 x 10-3
0.831
4.08 x 103
2.44 x 10-3
0.748
1440
2.22
7.11 x 103
2.15 x 10-3
0.908
6.12 x 103
1.56 x 10-3
0.597
(1)
2H2O+2e−→H2+2OH−
(2)
Fe→Fe2++2e−
(3)
Fe2+→Fe3++e−
(4)
1/2O2+H2O+2e−→2OH−
(5)
SO2−4+9H++8e−+HS−+4H2O
(6)
ZCPE=Y−1ο(jw)−n
How to cite
Oliveira, Edkarlla Sousa Dantas de et al. Evaluation of Microbiological Corrosion of API 5L X80 Steel by Electrochemical Techniques in Produced Water by the Oil Industry. Materials Research [online]. 2019, v. 22, suppl 1 [Accessed 5 April 2025], e20190525. Available from: <https://doi.org/10.1590/1980-5373-MR-2019-0525>. Epub 20 May 2020. ISSN 1980-5373. https://doi.org/10.1590/1980-5373-MR-2019-0525.
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Brazil E-mail: pessan@ufscar.br
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Evaluation of Microbiological Corrosion of API 5L X80 Steel by Electrochemical Techniques in Produced Water by the Oil Industry
