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Wyświetlanie 1-2 z 2
Tytuł:
Self-healing epoxy/PDMS/graphene oxide nanocomposites for anti-corrosive applications
Autorzy:
Moorthi, Krishna
Saxena, Vishesh
Prasanna Sanka, R.V. Siva
Rana, Sravendra
Powiązania:
https://bibliotekanauki.pl/articles/2173438.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
corrosion
self-healing materials
PDMS
graphene oxide
coating
korozja
materiał samoleczący
tlenek grafenu
powłoka
Opis:
This study discusses the synthesis, characterization and development of self-healing nanocomposite of amino-terminated PDMS (Polydimethylsiloxane), Epoxy (EPON828 ̧ Diethylenetriamine (DETA)), and Graphene Oxide (GO). GO was prepared using a modified Hummer’s method and was incorporated into the PDMS-Epoxy composite in various ratios (0.1 wt.%, 0.3 wt.%, and 0.5 wt.%) using toluene as the dispersing medium. Fourier Transform Infrared Spectroscopy was used for confirming the presence of the designed/prepared structures, and thermo-mechanical analysis was performed to test the change in glass transition temperature and initiation temperature of self-healing process. The composite resins were coated on mild steel substrates by curing freshly prepared resins over the substrates at elevated temperatures. The corrosion behavior of mild steel in 3.5 wt.% NaCl solution before and after the coatings was studied using Tafel Electrochemical Polarization test. The self-healing properties of the materials were also studied by applying cuts on the material and letting them heal under elevated temperatures, and the results showed that the prepared coating demonstrated an effective corrosion resistance for mild steel for various marine applications
Źródło:
Chemical and Process Engineering; 2022, 43, 2; 137--145
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Analysis of Molding and Modification of the Ceramic Surfaces and Its Impact on the Roughness of Castings
Autorzy:
Jesiotr, M.
Myszka, D.
Trzaskowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/947458.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nickel coating
roughness of casting surface
aluminum alloys
ceramic mold
polymer materials
powłoka niklowa
chropowatość powierzchni
stopy aluminium
formy ceramiczne
materiały polimerowe
Opis:
The article presents an analysis of changes in the outer surface of the casting made in a modified ceramic form. The introduction of the modification in the inner surface of the form, as a metallic coating was intended to produce a high quality of the casting surface. To describe the results, the three parameters have been chosen to characterize the surface roughness, i.e. Ra, Rz and Rq. In implementing the popular method of casting was used, so – called the lost polymer models. The models made from different plastic materials are chemically and electrochemically coated with a layer of nickel. The next step was to remove the model from the form and pouring the liquid metal over it. The observation of the casting surface was performed by using the scanning electron microscope and a profilometer. As a result of these attempts a number of castings have been obtained with an outside layer generated of lower roughness than the casting made in the normal gypsum form. The proposed method can be called an innovative one because it reduces the technological cycle by one processing operation of investment casting. During the process of casting both the cast and the outer layer improving the properties of the manufactured product is being produced.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1 spec.; 47-50
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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