Lanthanum-exchanged zeolite and clay as anticorrosive pigments for galvanized steel
- Roselli, Sol Natacha
- Bellotti, Natalia
- Deya, Marta Cecilia
- Revuelta, Mariana Valeria
- del Amo, Delia Beatriz
- Romagnoli, Roberto
DOIAbstract
A wide variety of inhibitive pigments is now being offered as possible alternatives to chromate and lead compounds for painted metals protection. Unfortunately, the most wide spread of these substitute pigments, zinc phosphate, has, at present, raised some environmental concern because phosphate causes the eutrophication of water courses and zinc itself is toxic. The aim of this research was to study the anticorrosive performance of a mixture consisting of zinc phosphate, modified zeolite and clay (bentonite) in order to diminish phosphate content in paints. The zeolite and the clay were exchanged with La(III) ions, as inorganic green inhibitor. In the first step, the anticorrosion protection by La(III) ions in solution was assessed by elec...
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