Preventions against corrosion using kind of native vegetables

摘要

Sort of vegetables that grows wild or are cultivated in big lands on specific interest produce substance like secondary metabolites which could be useful in the future on anticorrosive industry. Theses substances could be used in liquid or powder later than processing and can generate products for preliminary treatment of surface o base cover. In case of surface treatment it is referenced to a group rich on condensed tannic substances and another reason to a substances with a diverse composition then they have some performance mechanisms. Half-Arid regions where growths xerophytes species, the amount of inhibitor substances present in secondary metabolites could represent up to 100% of their own, depending on level of hydric stress that suffers the species. It had been studying the next species Aloe barbadensis Miller, Opuntia ficus indica, Avicennia nitida, Calotropis procera, Leimarecerus griseus, Punica granatum, Citrus aurantium, Citrus reticulatus blanco, Passiflora ligularis, Tamarindus indica, Mangifera indica, Caesal pinia coriaria. Gravimetric and electrochemical tests was did in a hydrochloric acid, sulfuric acid and hydro-sulfuric acid environments also in salty solution, was achieved it corroborated an decrease on corrosion velocity until one sixth part for Caesal pinia coriaria on HCl (1 M). In all case the corrosion velocity decreased for steel on acid environment. Depending on the way of treatment, the variation of the efficiency was notable, like aloe case where the application like film on steel was superior to 90%, and included directly on salty solution uninhibited. For this specie production of covering base for anti corrosive has been reached, the vegetal resin substance was modified or included like a pigment where the efficient has been compared with read lead alone or combined with.