Banca de QUALIFICAÇÃO: JULIANO BUENO BARBOSA DA SILVA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : JULIANO BUENO BARBOSA DA SILVA
DATE: 08/02/2022
TIME: 14:00
LOCAL: Conferencia MEET GOOGLE
TITLE:

FILAMENTAL FUNGI AND THEIR METABOLITES: RESEARCH OF CORROSION INHIBITION POTENTIAL

KEY WORDS:

Corrosion, Corrosion Inhibitors, Filamentous Fungi.

PAGES: 74
BIG AREA: Outra
AREA: Multidisciplinar
SUMMARY:

Corrosion of metallic structures is a serious economic problem that affects the entire planet. It is estimated that in Brazil, the amount spent on corrosion damage, whether to replace structures compromised by corrosion, restore damaged parts or even in accidents caused by corrosion of metallic structures, reach an average of 4% of the national GDP. It is therefore extremely harmful to the public purse. In addition, not only the public sector, but also the private sector suffers great losses resulting from this natural phenomenon. Corrosion is understood as the reverse process to metallurgy, where in this phenomenon, metallic structures are again converted to ores, which in the case of iron, one of the metals that suffer most corrosion in the world, reacts with the oxygen present in the air to form assorted nox iron oxides. It has already been observed in previous works that some filamentous fungi have the ability to partially or totally inhibit the corrosion of metallic structures, thus opening up a range of opportunities for the discovery of new formulations for a new natural type of corrosion inhibitor to based on fungal extracts, so far unpublished in the literature, which may in the future replace heavy metal-based inhibitors, which are extremely harmful to the environment. In this work, the corrosion potential of CA-50 carbon steel samples in an environment of calcium hydroxide containing chloride ions in the presence of two types of filamentous fungi: fusarium solani and penicillium oxalicum is studied. Initially, strains CCT2876 and CCT4815 of the fungi fusarium solani, and penicillium oxalicum, respectively, were obtained, both by reactivation through purchase by the André Tosello Foundation. The fungi were then subcultured on potato-dextrose-agar medium for culture maintenance, and after 30 days of growth, they were recultured on potato-dextrose medium. After 60 days of cultivation without agitation at a temperature of 26ºC in the absence of light, the biomaterial obtained was separated by vacuum filtration, and the solid part was removed from moisture through a desiccator for four days. The liquid filtrate from the cultures of the two fungi was then submitted to PCA tests and Tafel extrapolation curves, in order to measure their inhibitory potential.

BANKING MEMBERS:
Presidente - 1121401 - JOSEALDO TONHOLO
Interna - 1294906 - RUTH RUFINO DO NASCIMENTO
Interna - 426640 - FABIANE CAXICO DE ABREU GALDINO
Externo ao Programa - 1121768 - EDSON DE SOUZA BENTO
Externa ao Programa - 1314677 - CARMEM LUCIA DE PAIVA E SILVA ZANTA
Externo à Instituição - JOHNNATAN DUARTE DE FREITAS - IFAL
Externa à Instituição - SONIA SALGUEIRO MACHADO - UFAL