R. Haneda et K. Aramaki, PROTECTION OF COPPER CORROSION BY AN ULTRATHIN 2-DIMENSIONAL POLYMER FILM OF ALKANETHIOL MONOLAYER, Journal of the Electrochemical Society, 145(6), 1998, pp. 1856-1861
Citations number
20
Categorie Soggetti
Electrochemistry,"Materials Science, Coatings & Films
An ultrathin (ca. 5.0 nm thick), closely packed (self-assembly), tight
ly interconnected (two-dimensional polymer), and water-repellent (>130
degrees of the contact angle with water) film was prepared by modific
ation of an 11-mercapto-1-undecanol self-assembled monolayer adsorbed
on a copper surface with 1,2-bis(trichlorosilyl)ethane and subsequentl
y with octadecyltrichlorosilane at 5 x 10(-4) M for 24 h. This film pr
evented copper corrosion in aerated 0.5 M Na2SO4 with the protective e
fficiency, P, of the film being maintained at over 95% in the solution
for 15 h. The film provided excellent protection against indoor atmos
pheric corrosion of copper for 300 days. Effects of the surface roughn
ess on the water repellence of the surface covered with the film and o
n the P value of an unmodified or modified alkanethiol monolayer were
studied by using atomic force microscopy to examine mechanically abrad
ed and electropolished copper surfaces.