Banca de DEFESA: KAREN RAQUEL PEREIRA LEAL

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : KAREN RAQUEL PEREIRA LEAL
DATA : 31/08/2016
HORA: 14:00
LOCAL: Nupprar
TÍTULO:

Study hydroalcoholic jujube (Ziziphus joazeiro Mart.) In microemulsion system as a corrosion inhibitor for saline and possible application in the oil industry

PALAVRAS-CHAVES:

micellar system; natural surfactant; corrosion inhibitor

PÁGINAS: 59
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
RESUMO:

The metal corrosion is widely studied with the aim of obtaining a means to decrease or to avoid it. Even with a high percentage of inhibition, commercial corrosion inhibitors are often toxic to the environment and living beings, little available and high cost, which encouraged in recent years to the research of natural inhibitors in the form of extract of plants or oils essential. This study has lately become more interesting in the application of natural surfactant in microemulsion systems in order to optimize the corrosion process. In this work we applied the hydroalcoholic extract of jujube in a microemulsion containing saline aqueous solution of 3.5% NaCl (83%) -Tween 80 (15%) - Cotton oil (2%). The corrosion inhibition efficiency of micellar system was evaluated by electrochemical method of linear polarization curves determined and the inhibition efficiency was approximately 94% at a concentration of 200 ppm extract solution; 94% at a concentration of 100 ppm in solution and microemulsion at 96% concentration of 400 ppm in microemulsion extract with solubilized in solution. The evaluation of the results of polarization curves showed that both the extract, as the microemulsion behaved as the anodic type inhibitors.

MEMBROS DA BANCA:
Interno - 1645110 - CARLOS ALBERTO MARTINEZ HUITLE
Externo à Instituição - CÁTIA GUARACIARA FERNANDES TEIXEIRA ROSSI - FANEC
Presidente - 348475 - DJALMA RIBEIRO DA SILVA
Externo à Instituição - JARDEL DANTAS DA CUNHA - UFERSA