Optimization of the surface properties of nanostructured Ni-W alloys on steel by a mixed silane layer

M.P. QUIROGA ARGAÑARAZ; J. M. RAMALLO-LÓPEZ; G. BENITEZ; A.A. RUBERT; E.D. PRIETO; L. GASSA; R. C. SALVAREZZA; M. E. VELA

PHYSICAL CHEMISTRY CHEMICAL PHYSICS

ROYAL SOC CHEMISTRY

Lugar: CAMBRIDGE; Año: 2015 vol. 17 p. 14201 - 14207

1463-9076

Ni?W nanostructured coatings electrodeposited on steel by galvanostatic pulses were functionalized by tetraethoxysilane (TEOS) and octadecyltrichlorosilane (OTS) in a two-step procedure. A silica-rich layer is formed by the reaction of TEOS with the metal coating surface oxides, which allows a further reaction with OTS forming a hydrocarbon?silica outer network. This mixed silane layer provides hydrophobicity and improves the corrosion behavior of the Ni?W surface coatings without modifying their excellent mechanical properties.