Temat: Acid corrosion - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Adsorption and inhibitive properties of methanol extract of Eeuphorbia Heterophylla for the corrosion of copper in 0.5 M nitric acid solutions
Autorzy:: Fouda, A. S.
Elmorsi, M. A.
Abou-Elmagd, B. S.
Powiązania:: https://bibliotekanauki.pl/articles/780024.pdf
Data publikacji:: 2017
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: acid corrosion
copper
green inhibitor
adsorption
kinetic parameters
Opis:: The adsorption and the inhibitive properties of methanol extract of Euphorbia heterophylla on copper in 0.5 M HNO₃ have been studied by weight loss method at different temperatures (30-50°C), potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) techniques. Also, the surface morphology was analyzed by scanning electron microscopy (SEM). It was found that the inhibition efficiency increases with increasing extract doses and decreased with increasing temperature. The polarization data revealed that this extract acts as mixed type inhibitor. The adsorption process was more favored at lower temperatures with larger negative standard free energy. The extract was adsorbed physically on the copper surface followed Frumkin isotherm.
Źródło:: Polish Journal of Chemical Technology; 2017, 19, 1; 95-103
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Corrosion inhibition of mild steel in HCl solution by Tinidazole
Autorzy:: Reza, I.
Saleemi, A.R.
Naveed, S.
Powiązania:: https://bibliotekanauki.pl/articles/779380.pdf
Data publikacji:: 2011
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: korozja kwasowa
stal miękka
polaryzacja
tynidazol
acid corrosion
mild steel
polarization
EIS
tinidazole
Opis:: Tinidazole, a pharmaceutical compound has been investigated with reference to the inhibition of mild steel acidic corrosion in 1 molar HCl by means of weight loss and electrochemical measurements. The outcomes attained at 30°C revealed that the Tinidazole had obtained 90% inhibition efficiency at 400 ppm concentration. These results explain that the inhibition process occurs by means of adsorption. The inhibitor molecules adsorb on the surface of the metal, following Langmuir's adsorption isotherm. Potentiodynamic polarization measurements established that Tinidazole is an inhibitor of a mixed type. An appropriate equivalent electric circuit for modeling and the analysis of impedance data to give a better explanation of the process of corrosion inhibition have been proposed.
Źródło:: Polish Journal of Chemical Technology; 2011, 13, 1; 67-71
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Effects of Nicotiana Tobaccum Extract Additive on the Quality of Electroplating of Zinc on Mild Steel
Autorzy:: Loto, C.A.
Loto, R.T.
Powiązania:: https://bibliotekanauki.pl/articles/779362.pdf
Data publikacji:: 2013
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: electrodeposition
tobacco
steel surface
acid chloride solution
corrosion
Opis:: Experimental investigations have been performed to determine the effects of nicotiana tobaccum (tobacco) extract additive on the electrodeposition of zinc on mild steel in acid chloride solution. The experiments were performed under different plating time, different additive concentrations and fixed pH conditions. Zinc electrodeposition on mild steel was performed using a DC - supply at defined operating parameters. The surface of the plated steel was examined using scanning electron microscopy (SEM); and Energy Dispersive Spectroscopy (EDS) for the surface elemental composition analysis. Different surface characteristics were obtained depending upon the concentration of the additive and the plating time. The corrosion resistance of the plated surface was also determined by a gravimetric method. The quality of the electro-deposition of zinc was good as indicated by the microstructural morphology of the plated surface except for the few porosities observed. The electrodeposition process was sensitive to the changes in the additive concentration and plating time. Any variation in the plating parameter produced an entirely new and different surface morphology.
Źródło:: Polish Journal of Chemical Technology; 2013, 15, 1; 37-45
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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