| Anti-corrosive
activity of Langmuir-Blodgett (LB) mono- and multi-layers on different
surfaces.
The
LB technique is one of the oldest and most elegant approaches known that
allow researchers to purposefully arrange molecules into organized assemblies.
Molecules, usually amphiphiles, are first compressed to a close-packed
monolayer at a water or cations-containig surfaces followed by transfer
of the assembly as a monolayer to a solid support. Multilayer films are
formed through repeated deposition cycles.
Modification
of solid surfaces with nanolayers via chemical/physical interactions is
an important tool in surface engineering. The organic films deposited either
by self-assembling technique (SAM) or by Langmuir-Blodgett (LB) method
alter the surface properties (especially surface energies) and allow different
applications of the original solids, by LB film preparation the layer thickness
is well defined.
Under
aggressive conditions the inhibition of metal corrosion by surface nanolayers
depends on the composition of layers, on the length of carbon chain in
the amphiphiles and on the chemical/physical bond between the metal surface
and the amphiphiles. The mechanisms are explained by the blocking effect
of stable film formation.
Corrosion
inhibition by LB films requires fewer inhibitors and studies on corrosion
inhibition as a function of amount of inhibitor and inhibitor film thickness
deposited onto the metal surface can be performed. |
