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    Wyświetlanie 1-7 z 7
    Tytuł:
    Inhibition and adsorption of oil extract of Balanites aegyptiaca seeds on the corrosion of mild steel in hydrochloric acid environment
    Autorzy:
    Iroha, Nkem B.
    Hamilton-Amachree, Akens
    Powiązania:
    https://bibliotekanauki.pl/articles/1075452.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Balanites aegyptiaca
    Mild steel
    Temkin adsorption isotherm
    corrosion
    inhibition
    Opis:
    The efficiency of oil extract of Balanites aegyptiaca seeds on the inhibition of mild steel corrosion in 1 M HCl has been investigated using gravimetric and electrochemical (Potentiodynamic Polarization (PDP) and Electrochemical Impedance Spectroscopy (EIS)) techniques. Results obtained show that Balanites aegyptiaca (BA) oil extract inhibited the acid corrosion of mild steel. Polarization technique showed that BA oil extract acted as mixed-type inhibitor in 1 M HCl solution. The impedance technique reveals that charge-transfer process controls the corrosion of mild steel. The inhibiting action of BA oil extract was attributed to their adsorption on the mild steel surface and the formation of dense protective layer which increased by increasing their concentration. BA inhibits the corrosion of mild steel by an adsorption mechanism, which follows Temkin adsorption isotherm. Physical adsorption mechanism has been proposed for the inhibitory action of BA oil extract. The protective film formed on the surface was confirmed by scanning electron microscopy (SEM).
    Źródło:
    World Scientific News; 2019, 126; 183-197
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Plant extract as biodegradable inhibitor for zinc in dilute solution of sulphuric acid
    Autorzy:
    Onukwuli, O. D.
    Ezeugo, J. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1163555.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Picralima nitida leaf
    Zinc
    corrosion
    inhibition
    inhibitor
    Opis:
    The inhibitive action of the ethanol extract of oil from Picralima nitida leaf, towards acid corrosion of zinc, is tested using weight loss, and thermometry methods. It was found that the extract acted as a good corrosion inhibitor for zinc corrosion in 0.5 M H2SO4 solution. The inhibitive action of the extract was discussed in view of Langmuir adsorption isotherm. It was revealed that the adsorption of the extract on zinc surface is governed by spontaneous process. The inhibition efficiency (IE) increases in line with corresponding increase in extract concentration. The temperature effect of the corrosion inhibition on the IE was studied. Revelation from the studies indicates that the presence of extract increases the activation energy of the corrosion reaction. Furthermore, from the calculated thermodynamic parameters, it was observed that Picralima nitida extract provides a good protection to zinc against pitting corrosion in chloride ion containing solutions.
    Źródło:
    World Scientific News; 2018, 109; 195-210
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation on Corrosion Inhibition of Hura Crepitans for 2101 Duplex Stainless Steel in an Acidic Environment
    Autorzy:
    Temitayo, Ogunmodede O.
    Vawe, Humwapwa
    Johnson, Jonathan
    Adewole, Ezekie
    Ilesanmi, Osasona
    Powiązania:
    https://bibliotekanauki.pl/articles/2201784.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    corrosion
    steel
    Hura crepitans
    inhibitor
    sulphuric acid
    Opis:
    Corrosion is a global menace which has imparted the world economy greatly. One of the solutions proffered to these challenges is the use of inhibitors. Several natural inhibitors have been used to protect engineering materials from corroding. This research is focused on investigating the inhibitive properties of Hura crepitans seed (HCS) on Duplex Stainless Steel 2101 (DSS2101) in H2SO4. The selected plant part was subjected to characterization to determine the presence of organic anti-corrosion agents present. From the result, phytochemicals such as saponin, tannins, steroid and flavonoids were observed. The presence of the organic group accounted for the inhibitive efficiency recorded in the environment. The polarization studies revealed that generally the inhibitor produced from seed extract of Hura crepitans, improved the corrosion resistance of DSS2101 in 0.5M H2SO4. The optimum corrosion inhibitor efficiency was observed at 0.2% inhibitors in 0.5M H2SO4 for 2101DSS.
    Źródło:
    Advances in Science and Technology. Research Journal; 2022, 16, 4; 56--63
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of corrosion inhibition of Picralima nitida leaves extract as green corrosion inhibitor for zinc in 1.0 M HCl
    Autorzy:
    Ezeugo, J. N. O.
    Onukwuli, O. D.
    Omotioma, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1113582.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Picralima nitida
    Zinc
    corrosion
    inhibitor
    optimization
    Opis:
    Herein, the optimization of inhibitive action of the ethanol extract of oil from Picralima nitida leaves, towards acid corrosion of zinc, was tested using weight loss and thermometry methods. We found that the extract acts as a good corrosion inhibitor for zinc corrosion in 0.1 M HCl solutions. The inhibition action of the extract was discussed in view of Langmuir adsorption isotherm. This revealed that spontaneous processes govern the adsorption of the extract on zinc surface. Herein, the inhibition efficiency (IE) increases in line with corresponding increase in extract concentration. The temperature effect of the corrosion inhibition on the IE was also studied. This indicated that the presence of the extract increases the needed activation energy of the corrosion reaction. Furthermore, in our work, an optimal inhibition efficiency IE (%) of 86.78 was obtained at optimum inhibitor concentration of 1.2 gl-1, optimum temperature and time of 313 k and 8 hrs, respectively. From the calculated thermodynamic parameters, it can be said, then, that Picralima nitida extract provides good protection to zinc against pitting corrosion in chloride ion containing solutions.
    Źródło:
    World News of Natural Sciences; 2017, 15; 139-161
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photochemical screening and corrosion inhibition of Poupartia birrea back extracts as a potential green inhibitor for mild steel in 0.5 M H2SO4 medium
    Autorzy:
    Louis, H.
    Japari, J.
    Sadia, A.
    Philip, M.
    Bamanga, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1118151.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Poupartia birrea
    corrosion
    inhibitor
    mild steel
    Opis:
    Corrosion of metals is a serious environmental problem and has been given much attention in the oil and gas industries. In several industrial processes (acid cleaning and etching, removal of rust and scale), metal surfaces are often made to come in contact with acids. In the present study, an attempt was made to examine Poupartia birrea (P. birres) back extract as a potential green corrosion inhibitor for mild steel in a 0.5 M H2SO4 medium, using the weight loss determination method. The results of our work indicate that highest inhibition efficiency exhibited by Poupartia birrea is 70%. The inhibiting effect of the studied extract could be attributed to the presence of phytochemical constituents present in the extract that are adsorbed on the surface of the mild steel. The plant extract can, hence, be considered as being eco-friendly and an effective green corrosion inhibitor for mild steel exposed to an acid medium.
    Źródło:
    World News of Natural Sciences; 2017, 10; 95-100
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Corrosion Inhibitors by Nuclear Quadrupole Resonance Relaxometry Method
    Autorzy:
    Sinyavsky, N. Y.
    Mershiev, I. G.
    Korneva, I. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/117155.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    corrosion inhibitor
    Nuclear Quadrupole Resonance (NQR)
    nuclear magnetic resonance (NMR)
    Regularized Inverse Laplace Transform (RILT)
    Inhibition
    corrosion
    Relaxation Time Distribution
    Nuclear Magnetization Diffusion
    Opis:
    The changes taking place with the corrosion-resistant coating, but not the state of the surface subjected to corrosion are investigated in this paper in contrast to traditional approaches. We used the method of nitrogen relaxometry NQR and multi-exponential inversion of decay of longitudinal and transverse components of the nuclear magnetization is applied for the first time for this purpose. The results of experimental studies of changes in the distributions of spin-spin and spin-lattice relaxation of crystallite powder of sodium nitrite and urotropin, the mixture of which is used as a corrosion inhibitor of ferrous metals are considered.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 4; 587-590
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sustainable use of Natural Resources as Alternative for the Hazardous Corrosion Inhibitor of Mild Steel/Dilute Sulfuric Acid Interface: Weight Loss, EIS, AFM and FTIR Studies
    Autorzy:
    Tezeghdenti, M.
    Etteyeb, N.
    Dhouibi, L.
    Kanoun, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/351244.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Acacia Cyanophylla
    inhibition
    corrosion
    mild steel
    electrochemical impedance spectroscopy
    adsorption
    AFM
    Opis:
    Point of present exploration was to figure out the anticorrosion activity of Acacia Cyanophylla (Saligna leaves) extract on the corrosion of mild steel in dilute sulfuric acid medium, using weight loss measurements and electrochemical impedance spectroscopy. The result of the study revealed that the extract act as a potent inhibitor on mild steel in acid medium. The increase in inhibitor concentration and immersion time showed a positive effect on inhibition efficiency. EIS exhibited one capacitive loop which indicates that the corrosion reaction is controlled by charge transfer process. The increase of phase shift (n) in presence of (ACLE) lower surface roughness. This change reveals the adsorption of the inhibitor compound on the steel surface. According to the results of weight loss measurements, the adsorption of the extract on the steel surface can be described by the Langmuir isotherm. The inhibition mechanism of (ACLE) molecules involves physical interaction between the inhibitor and metal surface. Additionally, Protective film formation against acid attack was confirmed by FT-IR and AFM techniques.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 2; 697-707
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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