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    Wyświetlanie 1-11 z 11
    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:
    Adsorption and adsorption isotherm: application to corrosion inhibition studies of mild steel in 2 M HCl
    Autorzy:
    Abeng, F. E.
    Idim, V. D.
    Obono, O. E.
    Magu, T. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1178372.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Adsorption isotherm
    inhibition mechanism
    mild steel
    thermodynamic parameters
    Opis:
    Ethanollic extract of Phyllanthus amarus (EEPA) was tested as corrosion inhibitor for mild steel in 2 M HCl solution using gravimetric and gasometric methods at 303, 313, 323 K and 333 K. The results revealed that the corrosion rate increases with temperature and time. Addition of the concentration of ethanollic extract of Phyllanthus amarus to the corroding environment lowered the corrosion rate of mild steel and increased inhibition efficiency (IE %) of ethanollic extract. Inhibition efficiency was found to decreased with temperature. Fitting of the experimental data to the Arrhenius and Transition state equations revealed that the Organic constituents of the extract were physically adsorbed on the corroding surface of the steel and adsorption of ethanollic extract of Phyllanthus amarus (EEPA) on mild steel surface was found to obey the Langmuir adsorption isotherm and Freundlich adsorption isotherm and sign of the Gibb’s fee energy of the adsorption obtained suggested that inhibitor molecules have been spontaneously adsorbed onto the mild steel surface. Positive values obtained for enthalpy change indicated that the adsorption of inhibitor is endothermic.
    Źródło:
    World Scientific News; 2017, 77, 2; 298-313
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigating the extract constituents and corrosion inhibiting ability of Sida acuta leaves
    Autorzy:
    Adindu Chinonso, B.
    Oguzie Emeka, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1113826.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Sida acuta
    chemical constituents
    corrosion
    inhibitor
    mild steel
    Opis:
    Constituents of the ethanol extract of Sida acuta (SA) leaves were investigated by phytochemical, GC-MS and FTIR studies and its corrosion inhibition effects on mild steel was studied in 1 M HCl and 0.5 M H2SO4 solutions, using gravimetric and electrochemical methods of corrosion monitoring. The surface morphology of the mild steel surface before and after corrosion was also assessed using SEM imaging. The phytochemical, GC-MS and FTIR results revealed that SA contains carbonyl groups, aromatic rings, and double bonds that make it a prospective corrosion inhibitor for mild steel. Moreover, gravimetric results indicated that SA is an effective additive for the corrosion of mild steel at all the concentrations studied. Finally, the electrochemical results showed that SA inhibited both the anodic and cathodic half reactions by the adsorption of the extract constituents on the mild steel surface; this was further confirmed by the SEM investigations.
    Źródło:
    World News of Natural Sciences; 2017, 13; 63-81
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Green corrosion inhibitor for mild steel in 2 M HCl solution: Flavonoid extract of Erigeron floribundus
    Autorzy:
    Abeng, Fidelis Ebunta
    Idim, Veronica David
    Powiązania:
    https://bibliotekanauki.pl/articles/1177856.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Erigeron floribundus
    Flavonoid
    Green inhibitor
    corrosion
    mild steel
    Opis:
    The potential of flavonoid extract of Erigeron floribundus as green inhibitor for the corrosion of mild steel in 2 M HCl solution was studied using gasometric method. The results obtained, indicated that the extract is an adsorption inhibitor for the corrosion of mild steel. The inhibition efficiency of the inhibitor was found to increased with increase in concentration of the inhibitor. From the observed trend for the variation of inhibition efficiency with temperature and the range of value obtained from activation energy (16.16-3.02 KJmol-1), enthalpy (13.5-38.84 KJmol-1), entropy (-22.67 to 88.44 KJmol-1) and free energy (-4.23 to -2.61 KJmol-1), a chemical and physical adsorption mechanism is propose for the adsorption of the inhibitor on the mild steel surface. In addition, the adsorption is endothermic, spontaneous and is best described by Langmuir adsorption isotherm.
    Źródło:
    World Scientific News; 2018, 98; 89-99
    2392-2192
    Pojawia się w:
    World Scientific News
    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
    Tytuł:
    Analysis of the influence of the blanking clearance size to the burr development on the sheet of mild steel, brass and aluminium in blanking process
    Autorzy:
    Kamarul Adnan, A. A.
    Azinee, S. N.
    Norsilawati, N.
    Izzul, K. A. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2105503.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    blanking clearance
    burr height
    mild steel
    brass
    aluminium
    zadziory
    stal miękka
    mosiądz
    Opis:
    Purpose: This research aims to analyse the influence of blanking clearance size on the burr development for mild steel sheet, brass and aluminium. The main reason for this research is estimating the burr size on blank parts. It is still significant since the quality of the products is determined by evaluating the amount of allowable burr in the parts. Design/methodology/approach: For the blanking process on the 3.00 mm thick sheets, various sizes of blanking clearance for a 20 mm diameter of the die opening are employed, as is the technique for obtaining the parts. Then the height of the burr on each product was measured using a micrometre and toolmaker microscope. The height of burr for each size of blanking clearance have been recorded and compared using a graph. Comparison made to identify which measure of blanking clearance and which type of material will produce a small size of burr. Findings: For mild steel, brass, and aluminium, blanking clearance 0.15 mm produced burr heights of 0.088 mm, 0.015 mm, and 0.024 mm, and blanking clearance 0.13 mm produced bur heights of 0.192 mm, 0.055 mm, and 0.046 mm, respectively. The brass had a lower burr height than mild steel and aluminium, according to the results. More significant blanking clearance (0.15 mm) produced a smaller size of burr compared to a smaller blanking clearance (0.13 mm). Practical implications: This study focuses on burr height rather than the wear of the punch and die cutting edge; burr height can affect punch and die sharpness. It also can guide practitioners in estimating blanking clearance and the burr height of mild steel, brass and aluminium. Originality/value: This paper demonstrates that the gap between the punch and die influences the burr height. The material strength also affects the burr height, with a high tensile strength resulting in a larger burr.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2022, 111, 1; 26--32
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carbon Fibre Reinforced Polymer Fatigue Strengthening of Old Steel Material
    Autorzy:
    Kowal, Maciej
    Pietras, Daniel
    Powiązania:
    https://bibliotekanauki.pl/articles/2201890.pdf
    Data publikacji:
    2023
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    puddled steel
    mild steel
    CFRP laminate
    CFRP
    fatigue test
    steel reinforcement
    fatigue strength testing
    fatigue strengthening
    Opis:
    This paper reports the experimental results of a study investigating the effect of CFRP strengthening of metallic structures for increasing fatigue life. In the study, samples made form puddled steel and mild S235 grade steel strengthened with CFRP strips were examined. Samples were subjected to tensile fatigue loading with a stress ratio R of 0.115 and 0.130 (mild steel samples) and 0.13/1.25/0.15/1.07 (puddled steel samples). A total of 9 samples with CFRP/steel single overlap joints and 20 reference specimens were tested to determine their fatigue life and failure modes. Normal modulus CFRP strips with one cross section (20 x 1.4 mm) were used in this study. Laboratory test results showed that CFRP strengthening has visible effect on the fatigue life of the steel. The application of adhesively bonded CFRP laminates significantly prolongs fatigue life of the specimens. The increase in fatigue life of the steel samples strengthened with CFRP strips was 2 to 16 times (for mild steel) and 11.6 to 34.8 times (for puddled steel).
    Źródło:
    Advances in Science and Technology. Research Journal; 2023, 17, 1; 197--209
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    Tytuł:
    Effect of Friction Machining on Low Carbon Steel with Titanium Traces in terms of Surface Hardening
    Autorzy:
    Sheikh, Ali R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2203931.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    milling machine
    high speed steel
    mild steel
    face milling
    thermomechanical treatment
    frezarka
    stal szybkotnąca
    stal miękka
    frezowanie czołowe
    obróbka termomechaniczna
    Opis:
    This work is an experimental study of thermo-mechanical surface hardening of mild steel with trace elements like titanium in negligible concentrations. This is somewhat an advanced technique used to harden steel surface which can be hardened in many typical ways. The concept is combining the thermal as well as mechanical technique to attain better results. It is quite obvious that mechanical refers to the compressive loading during machining and thermal refers to producing heat on the surface of work piece. The ideal conditions are when the heat produced is enough to achieve austenite and then subsequent quick cooling helps in the formation of marten site, which is metallurgically the most highly strong phase of steel, in terms of hardness. The coolant used preferably is the emulsified oil which flows on the surface during machining with variable rate of flow as the optimum effect is. This process hardens the surface of steel and increases its resistance against wear and abrasion. Preference is to achieve surface hardening using the conventional equipment so that operational cost is kept low and better results are attained. This technique has been quite successful in the laboratory. It can be termed as friction hardening. Some improvements in the process scheme and working environment can be made to get better results.
    Źródło:
    Archives of Foundry Engineering; 2022, 22, 4; 41--46
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental study of mild steel cutting process by using the plasma arc method
    Autorzy:
    Magid, H.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2055758.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    cutting power
    edge roughness
    mild steel
    plasma arc cutting
    scanning speed
    moc skrawania
    chropowatość
    stal miękka
    cięcie plazmowe
    prędkość skanowania
    Opis:
    Purpose: In this study, plasma arc cutting (PAC) is an industrial process widely used for cutting various away types of metals in several operating conditions. Design/methodology/approach: It is carried out a systematic or an authoritative inquiry to discover and examine the fact, the plasma cutting process is to establish the accuracy and the quality of the cut in this current paper assessed a good away to better the cutting process. Findings: It found that the effect of parameters on the cutting quality than on the results performed to accomplish by statistical analysis. Research limitations/implications: The objective of the present work paper is to achieve cutting parameters, thus the quality of the cutting process depends upon the plasma gas pressure, scanning speed, cutting power, and cutting height. Practical implications: The product of the plasma cutting process experimentally has been the quality of the cutting equipment that was installed to monitor kerf width quality by exam the edge roughness, kerf width, and the size of the heat-affected zone (HAZ). Originality/value: The results reveal that were technically possessed of including all the relevant characteristics, then a quality control for the cutting and describe the consequence of the process parameters.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2021, 108, 2; 75--85
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Properties of WC-Co coatings with Al2O3 addition
    Autorzy:
    Radek, Norbert
    Powiązania:
    https://bibliotekanauki.pl/articles/23966862.pdf
    Data publikacji:
    2023
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    stal miękka
    osadzanie elektroiskrowe
    właściwości powłoki WC-Co-Al2O3
    odporność na korozję
    mild steel
    electrospark deposition
    WC-Co-Al2O3 coating properties
    corrosion resistance
    Opis:
    Properties of WC-Co coatings with Al2O3 addition on the C45 mild steel surface in acidic chloride solution were examined. The WC-Co-Al2O3 coatings on steel surfaces were deposited by an electro-spark (ESD) technique. The anti-corrosion properties of the coatings were mainly investigated by electrochemical methods. Moreover, the scanning electron microscope (SEM) was employed for the observation of the surface of materials. The structure of coatings depended on the composition of electrospark electrodes. In the WC80-Co5-Al2O315 coating, the largest corrosion resistance was shown. The corrosion rate of the specimen was approximately eight times smaller than the coating with out of Al2O3 addition. The aim of the research was to obtain, by adding alumina, an improvement in the functional properties of WC-Co coatings produced by the ESD method. Due to the original features of ESD coatings, they can be used in sliding friction pairs and as anti-wear coatings on cutting tools. C-Co coatings with AlO3 addition.
    Źródło:
    Production Engineering Archives; 2023, 29, 1; 94--100
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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