Banca de DEFESA: RAFAEL SANTOS BARBOSA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : RAFAEL SANTOS BARBOSA
DATA : 19/03/2021
HORA: 14:00
LOCAL: videoconferência na plataforma RNP (sala PEI-UFBA)
TÍTULO:

Effect of Glycerol Addition on Copper Electrodeposition on Steel Substrate.

PALAVRAS-CHAVES:

Eletrodeposition, copper, glycerol, corrosion, sustainability.

PÁGINAS: 135
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Produção
RESUMO:

Copper (Cu) electrodeposits are used to improve the corrosion resistance of carbon steel substrates in various applications, mainly in aeronautical, oil and automotive industries. The use of such compounds that increase deposition efficiency and corrosion resistance has attracted growing academic and industrial interests. As the state of the art seeks new sources of process improvements, industry seeks solutions for sustainable development, with the aim of making its procedures ecologically correct. From such bias, glycerol was used as additive - whose influence in copper baths is still few reported by literature - the acid sulfate solution chosen was composed by 0.8 M CuSO45H2O and 0.5 M H2SO4, and was adopted to perform electrodepositions. Such bath has been analyzed as a promising alternative to mitigate environmental and safety damage caused by traditional solutions proposed by industry which, in their majority, contain cyanides. In this study the effect of such additive was investigated in copper-based electrodeposition baths for coatings on AISI 1010 steel substrate. Electrodepositions were carried out in an electrolyte solution at room temperature, in the presence and absence of additive. The efficiency was analyzed by galvanostatic deposition and the corrosion resistance was evaluated by electrochemical tests and mass loss measures. Nanometer copper crystallites with an average of 30 nm were obtained. The results showed that the addition of glycerol reduced the grain size of copper electrodeposites by 28%, confirmed by Scanning Electron Microscopy (SEM) test. It was concluded that there was formed more compact phases of copper deposits that increased the efficiency of electrodeposition by approximately 96%, as well as promoted the elevation of the corrosion resistance properties of the deposits. A patent, resulted from the present work, was filed to INPI.

MEMBROS DA BANCA:
Presidente - 1675191 - MARCIO LUIS FERREIRA NASCIMENTO
Externo(a) ao Programa - 1349940 - CARLOS ALBERTO CALDAS DE SOUSA
Externo(a) à Instituição - : Tereza Cristina de Farias Guimarães
Externo(a) à Instituição - Guilherme Yuuki Koga