Volume 04 Issue 06-2024
41
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
04
ISSUE
06
Pages:
41-45
OCLC
–
1121105677
Publisher:
Oscar Publishing Services
Servi
ABSTRACT
In this work, new inhibitors of metal corrosion in sulfuric acid environments are studied depending on the duration of
the process, inhibitor concentration and temperature. The main parameters for the synthesis of new metal corrosion
inhibitors St.3 and St.12 grades using amine and amide containing organic substances are determined and methods
for obtaining these inhibitors are described. The physicochemical properties of amine and amide containing organic
inhibitors of corrosion and scaling in acidic process environments have been studied.
KEYWORDS
Amine, amide containing inhibitors, corrosion, scaling , corrosion rate, degree of inhibition, inhibition efficiency.
INTRODUCTION
Natural and other process gases of the Shurtan gas and
chemical complex (SHGCC) contain harmful acidic
impurities, such as carbon dioxide and sulfur
compounds ( hydrogen sulfide, mercaptan disulfides ).
These compounds cause corrosion of pipes and
equipment in natural gas separation plants. On the
other hand, sulfur impurities and their combustion
products pollute the environment and have a harmful
effect on the human div [1-2].
Based on the above, large-scale activities are currently
being carried out in our republic to synthesize and
study the physicochemical properties of new inhibitors
of metal corrosion and mineral salt deposition for the
chemical and oil and gas industries [3]. Particularly
Research Article
STUDYING THE PHYSICAL AND CHEMICAL PROPERTIES OF AMINE AND
AMIDE CONTAINING ORGANIC INHIBITORS
Submission Date:
June 10, 2024,
Accepted Date:
June 15, 2024,
Published Date:
June 20, 2024
Crossref doi:
https://doi.org/10.37547/ajast/Volume04Issue06-08
Alfiya Oserbaeva
Senior Lecturer, PhD, Tashkent Institute of Chemical Technology, Tashkent, Uzbekistan
Mohina Muhamadjonova
Student, Tashkent Institute of Chemical Technology, Tashkent, Uzbekistan
Shukhrat Bukhorov
professor, Tashkent Institute of Chemical Technology, Tashkent, Uzbekistan
Journal
Website:
https://theusajournals.
com/index.php/ajast
Copyright:
Original
content from this work
may be used under the
terms of the creative
commons
attributes
4.0 licence.
Volume 04 Issue 06-2024
42
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
04
ISSUE
06
Pages:
41-45
OCLC
–
1121105677
Publisher:
Oscar Publishing Services
Servi
important in this regard is the solution of these
problems for water supply systems of energy- and
water-intensive chemical production. Numerous
inhibitors of corrosion and mineral deposits have been
proposed. The republic's demand for such inhibitors
now amounts to more than 5 thousand tons per year.
Therefore, due to the lack of production of these
products in the Republic, the latter are imported from
foreign countries for foreign currency.
In order to develop new import-substituting and
export-oriented inhibitors of corrosion and mineral salt
deposits based on locally available raw materials and
secondary materials, we conducted targeted research.
Objects and methods of research. The materials for the
study were samples in the form of plastic, made of
steel grades St.3 and St.12. In work [4,5], salts Na 2 S
and NaCI were used . A 5-3 mol/l solution of H 2 S O 4
(background) was used as a model corrosive
environment ∙10, and tests were also carried out in a 1
-
3% aqueous solution of NaCI , NaOH and a 1-3% solution
of Na 2 S. The electrodes made from steel grade St.3
had the following composition: Fe = 98.36; C =0.20; Mn
=0.50; Si =0.15; P =0.04; S =0.05; Cr =0.30; Ni =0.20; Cu
=0.20.
Pre-treatment of steel samples included cleaning and
polishing their surface with sanding paper, followed by
chemical degreasing in an alkaline solution. The objects
of the study were synthesized new amine and amide
containing inhibitors conventionally designated ATKP,
IR-1 at various concentrations, temperatures and
media. The effect of a salt environment and inhibitors
on the corrosion behavior of steel samples (grade C
T.3, St.12.) was determined by polarization curve
methods and gravimetric methods based on the loss of
sample mass after corrosion tests . Inhibitors were also
studied using the electrochemical method on a
corroded steel surface.
Polarization curves of a steel electrode in acidic and
neutral media in the presence of amine and amide
containing ATKP and IR-1 inhibitors at various
concentrations and temperatures were recorded on a
PI-50.1.1 potentiostat , with a PR-8 programmer and a
PDA-1 potentiometer. During the experiments, the
area of the working electrode was selected based on
the capabilities of the potentiostat and the maximum
currents ( i ) in the region of active dissolution of steel.
Results and discussion. Results of the corrosion-
electrochemical behavior of electrodes made of steel
grade St.3. and St.12 in a 3% solution of H 2 S O 4 at a
temperature of 25
℃
and 70
℃
without additives and
with the addition of ATKP and IR-1 inhibitors are shown
in Table 1, as well as in Fig. 1.
Table 1.
Change in corrosion rate Art.3 and Art.12. in the presence of inhibitors
inhibitor
background
Temperature,
℃
K
corr
·10
-3
𝒁, %
𝜸
,%
ATKF
Without inhibitor
25
94.0
-
-
With the addition
of ATKP
4.96
94.7
5.27
Without inhibitor
0.35
-
-
Volume 04 Issue 06-2024
43
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
04
ISSUE
06
Pages:
41-45
OCLC
–
1121105677
Publisher:
Oscar Publishing Services
Servi
With the addition
of ATKP
70
0.011
96.8
3.17
IK-1
Without inhibitor
25
5.2
-
-
With the addition
of IK-1
0.2
96.0
3.8
Without inhibitor
70
4.40
-
-
With the addition
of IK-1
0.11
97.5
3.2
Fig.1. Dependence of the degree of inhibition of St.3 and St.12 in a sulfuric acid medium on the duration of the
process at t = 25 o C.
From the results presented in Table 1 and Fig. 1, it was
found that the IR-1 inhibitor has a more effective effect
on the degree of inhibition of St.3 and St.12 in a sulfuric
acid medium than the ATKP inhibitor. With the use of
the inhibitor IK-1, the corrosion rate of St.3 and St.12,
depending on the concentration of the inhibitor, was
84÷97.5%. Based on these experimental data obtained,
a new synthesized inhibitor IK-1 is recommended to
inhibit the process of corrosion and scaling of mineral
salts in equipment made from steel grades St.3 and
St.12.
The results of gravimetric determination of the values
of corrosion rate (Kcor ) and braking coefficient (γ) at
different temperatures (25 ) show 7-12% than imported
inhibitors such as “
℃
и
70
℃
Nalco
”
(Germany) and KW
currently used in industry -2353 (Russia). The results of
gravimetric studies and calculations of the corrosion
rate and degree of protection ( inhibition) are shown in
Figures 2 and 3.
19
41
63
81
28
54
72
87
38
68
83
92
58
81
93
99
3-
сутка
5-
сутка
7-
сутка
10-
сутка
Series1
Series2
Series3
Series4
Volume 04 Issue 06-2024
44
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
04
ISSUE
06
Pages:
41-45
OCLC
–
1121105677
Publisher:
Oscar Publishing Services
Servi
Fig.2. Dependence of the degree of inhibition of St. 3 (1) and St. 12 (2) in a sulfuric acid medium on the inhibitor
concentration T = 298 K,
Fig.3. Dependence of corrosion rate on process duration: inhibitors ATKP (1.1 1 ) and IR-1 (2.2 1 )
As can be seen from Fig. 2, the most significantly
effective results are achieved in the presence of 0.0001
mg/l solution of the IK-1 inhibitor in sulfuric acid media.
Thus, depending on the duration of corrosion tests, the
value of the degree of protective actions of IK-1 varies
from 75% to 89.9% (in Article 3) and from 73% to 98.0%
(in Article 12) . The nature of the degree of corrosion
protection of carbon steel St. 3 in solutions of H 2 S O 4
and others environments are approximately the same.
This is due to the formation on the surface that slows
down the diffusion of oxygen to the metal surface.
75
90
93
98
80
85
84
90
0
20
40
60
80
100
120
0.0001%
0.001%
0.01%
0.1%
Series1
Series2
Volume 04 Issue 06-2024
45
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
04
ISSUE
06
Pages:
41-45
OCLC
–
1121105677
Publisher:
Oscar Publishing Services
Servi
CONCLUSION
Comparing the results of studies on the corrosion of
steel grades St.3 and St.12 in sulfuric acid solutions,
high efficiency was found in the presence of an
inhibitor of the IK-1 type. Increasing the temperature of
the inhibition process to 70
℃
does not significantly
affect the degree of protection of metals (Art. 3 and
Art. 12) (75÷98.0%). It should be noted that when using
the Nalco brand inhibitor imported to the republics of
Uzbekistan, the degree of protection at 80
℃
is 87.58%.
REFERENCES
1.
Vigdorovich V.I. Sinyutina S.E. Universal inhibitor of
corrosion and hydrogenation of carbon steel St.3 in
environments containing H 2 S and CO 2 // Bulletin
of TSTU, 2008, T14. No. 1. -P.128-139.
2.
Gafurov R.R., Kudryavtseva I.A. Polvonyak V.K. ,
Bystrova O.N. Analysis of the protective properties
of nitrogen-phosphorus-containing steel corrosion
inhibitors // Practice of anti-corrosion protection-
2001, No. 4.-P.14-17
3.
Voloshin V.F. Study of the influence of quaternary
salts of 2-alkylimidazolines on electrode processes
// Questions of chemistry and chemical technology.
- 2003. No. 5. - P. 105-108.
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Oserbaeva A.K., Nurullaev Sh.P., Kodirov Kh.K.
Protection of steel from corrosion in acidic and
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biology.
–
2018.
–
No. 11 (53). - WITH . 58-61.
5.
Oserbayeva A., Jabbarov A., Ismailova N.
PREVENTION OF STEEL CORROSION IN NEUTRAL
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Chemistry.
–
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