Propriedades anticorrosivas do extrato rico em alcaloides produzidos a partir do resíduo da cadeia produtiva do jaborandi (Pilocarpus Microphylus Staff)

Abstract

Anticorrosive properties of the extract rich in alkaloids produced from the residue of the production chain jaborandi. Annual costs related to corrosion and corrosion prevention has been responsible for constituting a significant part of the GDP in the Western world. In addition to the economic costs and technological delays, corrosion can lead to structural failure which has dramatic consequences for humans and the environment. In this context it is observed the need for con- tinued development of coatings technology.In addition to the coating composition, consisting of binders, pigments, solvents, extenders and additives, the performance and durability of anticorrosive coatings depends on many different parameters, such as substrate type, substrate pretreatment, coating thickness, adhesion between the substrate and coating, as well as various external environmental parameters. The se- arch for natural products applied anticorrosive coatings has been of great industrial importance, one of the advantages is the lowest power consumption in its production compared to the production of synthetic components. Plant extracts are viewed as a rich source of naturally synthesized chemicals that can be extracted by simple pro- cedures and low cost. The substances can be of the type alkaloids such as quinine, strychnine and nicotine was studied as a corrosion inhibitor in acid media. Because the applicability of nitrogenous compounds with corrosion activity in this paper uses rich extract alkaloids leaf jaborandi, having as the major alkaloid epiisopiloturina used as corrosion protectors. The work involves the formation of films on substrate 1020 steel that were previously polished with wet sandpaper (No. 180-1200). These pieces were subjected to accelerated corrosion tests, by analysis of polarization in saline and impedance measurements. The films obtained on 1020 steel exhibit good adhesion and uniformity. Plates covered with films of the extract proved resistant to corrosion in saline environment.