Temat: corrosion metals - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Experimental study on the inhibitive effect of phytic acid as a corrosion inhibitor for Q235 mild steel in 1 M HCl environment
Autorzy:: Chidiebere, Maduabuchi A.
Nwanonenyi, Simeon
Njoku, Demian
Iroha, Nkem B.
Oguzie, Emeka E.
Li, Ying
Powiązania:: https://bibliotekanauki.pl/articles/1113467.pdf
Data publikacji:: 2017
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Adsorption
Corrosion
Electrochemical techniques
Inhibition
Metals
Plant extract
Opis:: The inhibitive action of phytic acid (PA) on Q235 mild steel corrosion in 1 M HCl environment was investigated using electrochemical techniques. Polarization results revealed PA to be a mixed- type inhibitor in 1 M HCl environment, while impedance results provide evidence of adsorption of the PA species on the corroding metal surface. The adsorption of PA obeyed Langmuir adsorption isotherm. Scanning electron microscopy (SEM), atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FTIR) studies all revealed the formation of a protective film adsorbed on the steel surface.
Źródło:: World News of Natural Sciences; 2017, 15; 1-19
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Sufficiency of the Corrosiveness of Petroleum Oils on the Decay of Metals
Autorzy:: Aluvihara, Suresh
Premachandra, Jagath K.
Powiązania:: https://bibliotekanauki.pl/articles/1046559.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Corrosion
Corrosiveness
Decay
Ferrous metals
Hardness
Petroleum oils
Weight loss
Opis:: Petroleum oils are the limited earth resources in which the variety of their chemical compositions are mostly composed of hydrocarbons and some trace compounds. Oils also contain various corrosive compounds. In the existing research, the major objective was the investigations of the impacts of such corrosive compounds within two different types of petroleum oils on the corrosion rates of seven different types of ferrous metals. As the methodology, the major corrosive properties of two different types of crude oils and chemical compositions of seven different types of metal were measured by standard instruments and methods. The corrosion rates of prepared metal coupons from seven different types of metals were determined by the relative weight loss method after immersion time periods separately in both crude oils in order of 15, 30 and 45 days, while qualitatively analyzing the corroded metal surfaces by optical microscope. In addition, the decayed ferrous and copper concentrations from metals into crude oils after immersion were measured by atomic absorption spectroscopy, while the status of the initial hardness of metal coupons were measured by the Vicker’s hardness tester. According to the obtained results, we saw higher corrosive stability from stainless steels which have chemical compositions of at least 12% of chromium with sufficient amounts of nickel, while in other steels, we noted relatively higher progress of the corrosion process regarding salts at lower temperatures, formations of FeS, Fe2O3, corrosion cracks and pits on the corrosion metal surfaces, significant decays of ferrous and copper from some metals into crude oils and slight reductions of the initial hardness of most metal types due to the corrosion.
Źródło:: World Scientific News; 2019, 137; 145-165
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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