Aluminum Pigments Encapsulated by MTES and TEOS for Corrosion Inhibition and their Characterizations

2014 ◽  
Vol 541-542 ◽  
pp. 7-11
Author(s):  
Pi Hui Pi ◽  
Chao Liu ◽  
Xiu Fang Wen ◽  
Shou Ping Xu ◽  
Jiang Cheng
Keyword(s):  
Corrosion Inhibition ◽  
Hybrid Film ◽  
Sol Gel ◽  
Sem Analysis ◽  
Aluminum Particles ◽  
Corrosive Media ◽  
Acid Media ◽  
Excellent Corrosion Resistance ◽  
Gel Layer ◽  
Inhibition Performance

Aluminum pigments were encapsulated by hydrolysis and condensation of tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES). The influences of solvents and ratio of MTES/TEOS on corrosion inhibition performance were studied. The FTIR, XPS and SEM analysis showed that both TEOS and MTES hydrolyzed and condensed at the same time to form a compact and thin sol-gel layer on the surface of aluminum pigments. Aluminum pigments encapsulated by MTES and TEOS, which can hardly generate H2 in acid media of pH=1 within 12h, show greatly excellent corrosion resistance than that only by TEOS or by MTES, due to the formation of a compact and thin hybrid film to protect aluminum particles from corrosive media.

Adsorption and Corrosion Inhibition Performance by Three New Ionic Liquids on API 5L X52 Steel Surface in Acid Media

2014 ◽  
Vol 53 (23) ◽  
pp. 9534-9543 ◽  
Author(s):  
Octavio Olivares-Xometl ◽  
Claudia López-Aguilar ◽  
Pilar Herrastí-González ◽  
Natalya V. Likhanova ◽  
Irina Lijanova ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Corrosion Inhibition ◽  
Steel Surface ◽  
Acid Media ◽  
X52 Steel ◽  
Inhibition Performance

Evaluation of corrosion inhibition performance of silica sol–gel layers deposited on galvanised steel

2016 ◽  
Vol 51 (5) ◽  
pp. 373-382 ◽  
Author(s):  
N. Cotolan ◽  
S. Varvara ◽  
E. Albert ◽  
G. Szabó ◽  
Z. Hórvölgyi ◽  
...  
Keyword(s):  
Corrosion Inhibition ◽  
Sol Gel ◽  
Silica Sol ◽  
Galvanised Steel ◽  
Inhibition Performance

scholarly journals CORROSION INHIBITION PERFORMANCE OF PINK, ORANGE AND WHITE COLOURED BOUGAINVILLEA GLABRA BRACT EXTRACT ON MILD STEEL IN 1N HCl

2017 ◽  
Vol 4 (1) ◽  
pp. 59-64
Author(s):  
Gunavathy N ◽  
Sangeetha M
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Optimum Concentration ◽  
Ftir Analysis ◽  
Acid Media ◽  
Maximum Inhibition ◽  
Corrosion Inhibition Efficiency ◽  
Inhibition Performance ◽  
Bougainvillea Glabra

The present study was undertaken to find out the phytochemicals present in Bougainvillea glabra bracts extract and to compare the corrosion inhibition efficiency between B.glabra Pink, Orange and White coloured bract extract on mild steel in 1N HCl. Phyto chemical analysis showed the presence of alkaloids, flavonoids, phenolic compounds and tannins in the extract as confirmed by implying different qualitative tests specified for these phytochemical. Corrosion rate, inhibition efficiency, FTIR analysis was determined. The corrosion of mild steel in 1N HCl acid media was significantly reduced upon the additions of BG bract extracts. The inhibition efficiency increased with the increasing concentration of the inhibitor. Maximum inhibition efficiency was observed at an optimum concentration of 2 % v/v.

Depositing of Amorphous Ferri-Oxide Nanoparticles on Surfaces of Submicron Aluminum Powder

2013 ◽  
Vol 320 ◽  
pp. 451-455 ◽  
Author(s):  
Yi Wang ◽  
Wei Jiang ◽  
Xiao Lan Song ◽  
Guo Dong Deng ◽  
Feng Sheng Li
Keyword(s):  
Sol Gel ◽  
Sem Analysis ◽  
Mass Ratio ◽  
Weak Base ◽  
Aluminum Particles ◽  
Xrd Pattern ◽  
The Core ◽  
Peak Point ◽  
Core Shell Structure ◽  
Gel Processing

Nanoparticles with about 20nm diameter were densely coated on the surface of submicron Al via a sol-gel processing in ethanol, wherein 1,2-epoxypropane acted as a weak base to consume proton in solution. After the medium gelled, uniform network formed and aluminum particles imbedded in it. The core-shell structure and the nanoparticles were observed in SEM analysis. The EDS spectrum and the XRD pattern revealed that the cores consisted of amorphous ferri-oxide of which the mass ratio is closed to that of crystal Fe2O3. Thermal analysis was performed and the results indicated that the DSC peak point of ferri-oxide/Al nanocomposite showed 53 °C lower than that of [ferri-oxide+A simple mixture.

scholarly journals Corrosion inhibition of mild steel by N, N’-(5,5- dimethylcyclohexane-1,3-diylidene)dianiline in acid media: Gravimetric and electrochemical evaluations

2021 ◽  
pp. 67-80
Author(s):  
K. Ragi ◽  
Joby Thomas Kakkassery ◽  
Vinod P. Raphael ◽  
Binsi M. Paulson ◽  
Reeja Johnson
Keyword(s):  
Schiff Base ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Electrochemical Noise ◽  
Electrochemical Impedance ◽  
Sem Analysis ◽  
Metal Dissolution ◽  
Acid Media ◽  
Corrosion Inhibition Efficiency

The corrosion inhibition efficiency of the Schiff base N,N’-(5,5-dimethylcyclohexane-1,3-diylidene)dianiline (DmChDa) on mild steel in 1M HCl and 0.5M H2SO4 was evaluated using gravimetric, electrochemical impedance spectroscopy, potentiodynamic polarization and electrochemical noise measurement. Experimental results established that DmChDa possess relatively high corrosion inhibition capacity. Langmuir and El-Awady adsorption isotherms were obeyed by the Schiff base in 1M HCl and 0.5M H2SO4 respectively. SEM analysis showed that DmChDa was adsorbed on the steel surface during corrosion inhibition. The variation of metal dissolution with temperature was also examined using gravimetric study.

scholarly journals Data on Evaluation of the Corrosion Inhibition Effect of L-alpha-aminoisocaproate on High Carbon Steel Corrosion in Dilute Acid Media

2019 ◽  
Vol 25 (4) ◽  
pp. 422-426
Author(s):  
Roland LOTO ◽  
Cleophas LOTO
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibition ◽  
High Carbon Steel ◽  
Open Circuit ◽  
Time Dependent ◽  
Secondary Amines ◽  
High Carbon ◽  
Acid Media ◽  
Potential Measurement ◽  
Inhibition Performance

Corrosion inhibition performance of l-alpha-aminoisocaproate on high carbon steel in 1 M HCl solution has been studied by weight loss measurement, open circuit potential measurement, optical microscopy and ATF-FTIR spectral analysis. The results showed the inhibition performance of l-alpha-aminoisocaproate is time dependent attaining an optimal value of 85.88 % at 5.63 % l-alpha-aminoisocaproate concentration (highest concentration) after 288 h of exposure. The corrosion potential plots of the high carbon steel at 0.91 % (lowest concentration) and 5.63 % l-alpha-aminoisocaproate concentration were more electropositive than the plots at 0% l-alpha-aminoisocaproate concentration due to the effective inhibition performance of l-alpha-aminoisocaproate in counteracting the oxidation of the carbon steel in the presence of chloride anions. Identified functional groups of alcohols, phenols, primary and secondary amines and amides, carboxylic acids, alkynes, aromatics, alkenes and alkanes consisting of O–H stretch, free hydroxyl, H–bonded, N–H stretch, –C(triple bond)C–H: C–H stretch, C–H stretch and =C–H stretch bonds where responsible for the corrosion inhibition. The optical morphology of the carbon steel after 7200 s of exposure in the acid solution without l-alpha-aminoisocaproate was severely corroded in contrast to the morphology of the steel in the presence of l-alpha-aminoisocaproate which underwent minor deterioration due to the time dependent action of the inhibitor.

Experimental and theoretical studies on corrosion inhibition performance of an environmentally friendly drug on the corrosion of copper in acid media

2018 ◽  
Vol 65 (1) ◽  
pp. 19-33 ◽  
Author(s):  
Kumar P.E. ◽  
Govindaraju M. ◽  
Sivakumar V.
Keyword(s):  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Inhibitor Molecule ◽  
Acid Media ◽  
Potential Of Zero Charge ◽  
Content Type ◽  
Corrosion Inhibition Efficiency ◽  
Inhibition Performance ◽  
Sulfuric Acid Solutions

Purpose The purpose of this paper is to study the corrosion inhibition performance of an eco-friendly drug clozapine on the corrosion of copper in 1.0 M nitric acid and 0.5 M sulfuric acid solutions. Design/methodology/approach The corrosion inhibition nature of inhibitor molecule was evaluated by weight loss, electrochemical impedance spectroscopy and potentiodynamic polarization studies. An attempt was made to correlate the molecular properties of neutral and protonated forms of inhibitor molecule using quantum chemical calculations. The effect of temperature on the corrosion inhibition efficiency was also studied using electrochemical impedance spectroscopy. The potential of zero charge was determined to explain the mechanism of corrosion inhibition. Findings The studies on corrosion inhibition performance of clozapine showed that it has good corrosion inhibition efficiency on the corrosion of copper in 1.0 M nitric acid and 0.5 M sulfuric acid solutions. The adsorption of clozapine molecules onto the copper surface obeyed the Langmuir adsorption isotherm. The value of free energy of adsorption calculated is very close to −40 kJmol−1, indicating that the adsorption is through electrostatic coulombic attraction and chemisorption. The decrease in the value of energy of activation with the addition of inhibitor also shows the chemisorption of the inhibitor on the metal surface. The potential of zero charge and quantum chemical studies confirmed that the protonated molecules also get involved in the corrosion inhibition process through physisorption. Originality/value The present work indicates that clozapine can act as a good corrosion inhibitor for the corrosion of copper in acid media.

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