Corrosion Inhibition of Carbon Steel in Sulfuric Acid Solutions Using Triazole Derivative
Transcript of Corrosion Inhibition of Carbon Steel in Sulfuric Acid Solutions Using Triazole Derivative
Corrosion inhibition of carbon steel in sulfuric acid using green inhibitor
I am a Researcher (9th Cycle)
Mohammed Al-rasheed, Abdulrahman Al-mansouri, Khalifa Al-naimi, Abdulrahamn Al-Amarri
Supervised by :Dr. Yahia Hussein Shoeb Mr. Mostafa Hussein Ramadan
Sukari Group - Omar Bin Al-khattab
Outlines
• Introduction• Aim of Research• Experimental Techniques• Result & discussion• Impacts of the Research in Qatar.• Conclusions
Introduction
What’s Corrosion? It’s the spontaneous destruction of material as a
result of interaction with the surrounding environment.
Corrosion causes many negative effects on our daily life;
bridges may collapse, cars may lose control and pipes may leak and lose carrying capacity.
Corrosion problems :
Methods of corrosion control
Cathodic Protection
Coating
Inhibitors
Aim of our research
To study the efficiency of a new green inhibitor the (4-amino-triazole-3-thiol) to control the corrosion of carbon steel in acidic media
Experimental techniques
1. WEIGHT LOSS
2. POTENTIODYNAMIC POLARIZATION
3. SEM-EDX
1. Carbon steel sheets
Materials and Equipment
A. Materials
2. Sulfuric acid solution
3. 4-amino-triazole-3-thiol
5. SiC emery papers grades 180-1000
4. Diamond paste 6, 3 and 1
Materials and Equipment
B. Equipments
Polishing machine
Analytical balance
Potentiostat
Scanning electron microscope
Weight loss1 2
43
Potentiodynamic Polarization
SEM-EDX Analysis
Result & discussion
Weight loss resultsElectrolytic solution Corrosion rate
mg/cm2
Inhibition efficiency %
1M H2SO4 31543.3 -1M H2SO4 + 0.01mM triazole
23657.5 25.1
1M H2SO4 + 0.05 mM triazole
19493.8 38.2
1M H2SO4 + 0.1 mM triazole
12585.8 60.1
1M H2SO4 +0.5 mM triazole
1230.2 96.2
Blank 1 x 10-5 5 x 10-5 1 x 10-4 5 x 10-40
20
40
60
80
100
1M H2SO4
1M H2SO4+ 1 x 10-5 M TRIAZOLE
1M H2SO4+ 5 x 10-5 M TRIAZOLE
1M H2SO4+ 1 x 10-4 M TRIAZOLE
1M H2SO4+ 5 x 10-4 M TRIAZOLE
Eff
icie
ncy
, %
Concentration, M
-7 -6 -5 -4 -3 -2 -1
-1.1
-1.0
-0.9
-0.8
-0.7
-0.6
-0.5 C-Steel + 1 M H2SO4
C-Steel + 1 M H2SO4+ 1.0 x 10-5
C-Steel + 1 M H2SO4+ 5.0 x 10-5
C-Steel + 1 M H2SO4+ 1.0 x 10-4
C-Steel + 1 M H2SO4+ 5.0 x 10-4
E, m
V (
SC
E)
log i/A, A/cm2-0.00006 -0.00004 -0.00002 0.00000 0.00002 0.00004 0.00006
-0.88
-0.86
-0.84
-0.82
-0.80
-0.78
-0.76
-0.74
-0.72 C-Steel + 1 M H2SO4
C-Steel + 1 M H2SO4+ 1.0 x 10-5
C-Steel + 1 M H2SO4+ 5.0 x 10-5
C-Steel + 1 M H2SO4+ 1.0 x 10-4
C-Steel + 1 M H2SO4+ 5.0 x 10-4
E, m
V (
SC
E)
i, A
Polarization Curves
potentiodynamic curves for C-Steel in 1 M H2SO4 with different concentrations of Triazole
linear curves for C-Steel in 1 M H2SO4 with different concentrations of Triazole
Potentiodynamic Polarization results
Inhibitor concentration, mol. L-1
Ecorr,
(mV)iCorr, µA a c
Corrosion rate / mpy
Inhibition efficiency (%)
Blank - 867.2 4.95 x103 226.5 186.4 2.272 x 103 -
1.0 x 10-5 -893.1 3.20 x103 223.4 134.3 1.469 x 103 35.35
5.0 x 10-5 -929.1 904.1 221.6 98.4 416.5 81.73
1.0 x 10-4 - 930.2 137.7 217.4 91.35 63.15 97.22
5.0 x 10-4 - 932.2 74.38 215.9 87.39 34.10 98.50
EDX Analysis
SEM Analysis
Untreated Carbon Steel
Carbon Steel + H2SO4
Bare surface After immersion in 2 M H2SO4 for 3 hrs
Carbon Steel + H2SO4
+ Triazole
After immersion in 2 M H2SO4 containing 2x10-3 M
triazole
EDX Analysis
Carbon SteelCarbon Steel +
H2SO4
Carbon Steel + H2SO4
+ Triazole
The Economical impact in Qatar:
Oil and gas constitute one of the most important industries in Qatar and corrosion presents a big challenge to them so it is very important to control the corrosion process to reduce the economic loss.
Conclusion
Aminotriazole thiol is a highly efficient green inhibitor for carbon steel specially at concentration higher than 0.5x10-3 M.
Aminotriazole thiol inhibition takes place via chemical adsorption on steel surface as revealed from EDX analysis.
AcknowledgmentThanks to all who worked on this program from organizers to doctors and
teachers.• Dr. Noora Al-Thani and the I’m Researcher Team• Dr. Yahia Hussein Shoeb and Mr. Mostafa Hussein Ramadan• Mrs. Marwa gaboub• Mrs. Noura Al Qahtani• Special thanks to Al-bairaq, the CAM (Center For Advanced Material ) ,
CLU (Central Lab Unit ) and to all the sponsors, UNESCO , Qatar National Commission for Education, Culture and Science , Ras Gas, Maersk oil, Qatar-Shell.
• Omar Bin Al khattab Secondary School For Boys
I am a Researcher (9th Cycle)