Investigation of the anticorrosion efficiency of ferrites Mg1−xZnxFe2O4 with different particle morphology and chemical composition in epoxy-ester resin-based coatings

Anticorrosive efficiency of alkyd resin-based coatings containing Mg–Zn–Fe mixed oxide-based pigments

“…Most effi cient with respect to corrosion protection in the atmosphere with condensed moisture were nonisometric pigments with lamellar or needle-shaped particles. The paints containing them were perfectly resistant to blistering and protected the substrate against corrosion very well [33]. Their concentration in the paint, however, is an important variable: in fact, their protective effi ciency decreases sharply after the exceeding the optimum PVC level [43].…”

“…Every property of a pigmented paint is at its optimum at a specifi c pigment concentration; this applies particularly to the physical and anticorrosive properties [2,14,33]. So it is possible to identify a pigment concentration at which a specifi c property is at its best or at which the overall anticorrosive effi ciency is at its maximum [37].…”

“…This procedure was based on the ISO 787-14 standard [32,33]. A Mastersizer 2000 particle size analyser was used for determination of the particle size distribution.…”

“…Components of minor importance in this pigment included magnetite (Fe 3 O 4 ) from the starting hematite, and the silicon dioxide cristobalite from talc in the core. The synthesized pigments Pig D and Pig E were referred in this work as the core shell type pigments [30,31,33].…”

Heteropolyacids like new anticorrosion pigment in organic paints

“…Jedním možným způsobem ochrany tohoto materiálu jsou organické povlaky jako ochranné nátěry s obsahem vodivých polymerů, které chrání podkladovou ocel před průnikem korozního prostředí. Transfer generovaných elektronů, rozhraní nátěr/kov, probíhá po konjugovaném řetězci dvojných vazeb polymeru [4]. Vodivé polymery jsou známé již řadu let.…”