Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 2016

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: osadzanie elektroforetyczne (EPD)

Sortuj według:

Ogranicz wyniki do:

Influence of polyethylenimine on the electrophoretic deposition of SiO2 and Ni/SiO2 coatings on 316L stainless steel

Ratajski T., Kalemba-Rec I., Dubiel B.

Inżynieria Materiałowa

2016

Vol. 37, nr 4

184--189

The aim of the present work was to investigate the influence of polyethylenimine, a cationic polymer surfactant, on the microstructure and corrosion resistance of SiO2 and Ni/SiO2 coatings electrophoretically deposited on 316L stainless steel. The relationship between zeta potential and pH of the ethanol-based suspensions of SiO2 and Ni powder particles with addition of polyethylenimine was determined. The parameters of electrophoretic deposition process (applied voltage, time, distance between electrodes) were developed to prepare good quality coatings. Cathodophoresis from suspensions with polyethylenimine addition was performed with slightly lower applied voltage and time as compared to anodic deposition of coatings without surfactant. The microstructure of the coatings, their surface roughness and adhesion to the substrate were investigated. The protective behaviour of the coatings was studied by potentiodynamic measurements in 3.5% NaCl water solution. The microstructure and properties of the coatings were compared with those obtained without polyethylenimine addition. It was determined that the microstructure of SiO2 and Ni/SiO2 coatings deposited from suspensions containing polyethylenimine was more uniform and contained smaller amount of cracks and voids than the coatings achieved without polyelectrolyte. It was also observed that the quality improvement of the coatings deposited on 316L steel due to addition of polyelectrolyte with binding properties leads to increase of their corrosion resistance.

Celem pracy było zbadanie wpływu polietylenoiminy (PEI) na stabilność zawiesin na bazie etanolu używanych do osadzania elektroforetycznego (EPD) powłok SiO2 i nanokompozytowych powłok Ni/SiO2 na stali 316L. Zbadano mikrostrukturę powłok oraz topografię powierzchni, przyczepność do podłoża i odporność na korozję w 3,5% roztworze NaCl.