Corrosion is a huge technological problem, which causes
an important waste of money. However, nowadays, people are
not worried only with the waste of money but also with pollution
problems provoked by some chemicals used in corrosion protection.
Some methods to prevent corrosion, as the use of chromates,
are very dangerous to people health and related to pollution.
So that, research on new methods for corrosion protection
are widely developed.
Polymeric acrylic blends using electronic conducting polymers
can be used for corrosion protection as intelligent films.
This means that the polymeric blend can release a very passivating
anion in the metal/film interface when metal dissolution
is produced. In this way, the metallic cation can form another
inorganic passive film with the anion release by the organic
film.
The
figure shows linear voltammograms for naked iron and iron
protected with a film of polymeric blend in a corrosive
acid chloride medium. The current density for Fe/blend electrode
is several orders of magnitude smaller than the naked iron
electrode showing the protective character of the acrylic
conducting blend.
