Electrochemical Study on Newly Synthesized Chlorocurcumin as an Inhibitor for Mild Steel Corrosion in Hydrochloric Acid
Abstract
:1. Introduction
2. Results and Discussion
2.1. Polarization Measurements
Concentration (mM) | βa (V dec−1) | βc (V dec−1) | icorr (μA cm−2) | −Ecorr (mV vs. SCE) | IE% |
---|---|---|---|---|---|
Blank | 0.12 | 0.14 | 660.1 | 491 | 0.00 |
0.1 | 0.15 | 0.13 | 421.0 | 501 | 36.22 |
0.2 | 0.12 | 0.11 | 254 | 528 | 61.52 |
0.3 | 0.10 | 0.11 | 232 | 493 | 64.85 |
0.4 | 0.09 | 0.10 | 150 | 491 | 77.28 |
0.5 | 0.09 | 0.11 | 145 | 482 | 78.03 |
2.2. Electrochemical Impedance Spectroscopy (EIS) Measurements
Concentration (mM) | Rs (ohm cm−2) | Rct (ohm cm−2) | CPEdl YoX10−5 (Ssα/cm2) | α | Cdl (μF cm−2) | IE% |
---|---|---|---|---|---|---|
0 | – | 42.00 | – | 0.78 | 294.47 | 0.00 |
0.1 | 2.15 | 61.45 | 60.48 | 0.74 | 190.21 | 31.65 |
0.2 | 0.69 | 87.85 | 47.60 | 0.76 | 174.68 | 52.19 |
0.3 | 1.12 | 91.55 | 38.86 | 0.81 | 177.69 | 54.12 |
0.4 | 0.94 | 121.40 | 27.37 | 0.82 | 159.64 | 65.40 |
0.5 | 1.65 | 130.80 | 29.10 | 0.84 | 126.14 | 67.89 |
2.3. Corrosion Kinetic Parameters
Concentration | Ea (kJ·mol−1) | ∆Ha (kJ·mol−1) | ∆Sa (J·mol−1·K−1) |
---|---|---|---|
Blank | 77.25 | 74.61 | −60.44 |
0.5 mM | 104.74 | 102.10 | 18.91 |
2.4. Adsorption Isotherm
3. Experimental Section
3.1. Synthesis of Chlorocurcumin
3.2. Electrochemical Measurements
4. Conclusions
Acknowledgements
Conflicts of Interest
References
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Al-Amiery, A.A.; Kadhum, A.A.H.; Mohamad, A.B.; Musa, A.Y.; Li, C.J. Electrochemical Study on Newly Synthesized Chlorocurcumin as an Inhibitor for Mild Steel Corrosion in Hydrochloric Acid. Materials 2013, 6, 5466-5477. https://doi.org/10.3390/ma6125466
Al-Amiery AA, Kadhum AAH, Mohamad AB, Musa AY, Li CJ. Electrochemical Study on Newly Synthesized Chlorocurcumin as an Inhibitor for Mild Steel Corrosion in Hydrochloric Acid. Materials. 2013; 6(12):5466-5477. https://doi.org/10.3390/ma6125466
Chicago/Turabian StyleAl-Amiery, Ahmed A., Abdul Amir H. Kadhum, Abu Bakar Mohamad, Ahmed Y. Musa, and Cheong Jiun Li. 2013. "Electrochemical Study on Newly Synthesized Chlorocurcumin as an Inhibitor for Mild Steel Corrosion in Hydrochloric Acid" Materials 6, no. 12: 5466-5477. https://doi.org/10.3390/ma6125466