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Previous issue date: 2012-07-30 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The resistance of aluminum and their alloys, to the corrosion phenomenon, in aqueous solutions,
is a result of the oxide layer formed. However, the corrosion process in the aluminum alloy is
associated with the presence a second phase of particles or the presence of chloride ions which
promote the disruption of the oxide layer located producing the corrosion process. On the other
hand, the term water produced is used to describe the water after the separation of the oil and gas
in API separators. The volumes of produced water arrive around 5 more times to the volume of
oil produced. The greatest feature of the water is the presence of numerous pollutants. Due to the
increased volume of waste around the world in the current decade, the outcome and the effect of
the discharge of produced water on the environment has recently become an important issue of
environmental concern where numerous treatments are aimed at reducing these contaminants
before disposal. Then, this study aims to investigate the electrochemical corrosion behavior of
aluminum alloy 6060 in presence of water produced and the influence of organic components as
well as chloride ions, by using the electrochemical techniques of linear polarization. The
modification of the passive layer and the likely breakpoints were observed by atomic force
microscopy (AFM). In the pit formation potential around -0.4 to -0.8 V/EAg/AgCl was observed that
the diffusion of chloride ions occurs via the layer formed with the probable formation of pits.
Whereas, at temperatures above 65 ?C, it was observed that the range of potential for thepit
formation was -0.4 to -0.5 V/EAg/AgCl. In all reactions, the concentration of Al(OH)3 in the form of
a gel was observed / A resistencia do aluminio e suas ligas a corros?o em meio aquoso ? resultado da camada de oxido
formada. Entretanto, o processo corrosivo nas ligas de alum?nio esta associado a presen?a de
part?culas de segunda fase ou a presen?a de ions cloreto que promovem a ruptura da camada de
?xido produzindo o processo corrosivo localizado. Por outro lado, o termo ?gua produzida ?
usado para descrever a ?gua ap?s a sua separa??o do ?leo e g?s nos separadores API. Os volumes
de ?gua produzida chegam em m?dia de 5 vezes o volume do ?leo produzido. A maior
caracter?stica dessa ?gua ? a presen?a de in?meros contaminantes. Devido ao aumento do volume
dos res?duos em todo o mundo na d?cada atual, o desfecho e do efeito da descarga de ?gua
produzida sobre o meio ambiente tem recentemente tornar-se uma quest?o importante de
preocupa??o ambiental onde in?meros tratamentos s?o destinados a redu??o destes
contaminantes antes do descarte. Ent?o, o presente estudo visa investigar o comportamento
eletroquimico de corros?o da liga de aluminio 6060 em presen?a de ?gua produzida e a influencia
dos componentes organicos assim como dos ions cloreto, atrav?s do uso das tecnicas
eletroqu?micas de polariza??o linear. A modifica??o da camada passiva e os prov?veis pontos de
ruptura foram observados por microscopia de for?a atomica (AFM). No potencial de forma??o de
pit de -0,4 a -0,8 V/EAg/AgCl observa-se que ocorre a difus?o dos ?ons cloreto pela camada
formada com prov?vel forma??o de pites. Entretanto, em temperaturas superiores a 65?C
observou-se que a faixa de potencial de forma??o de pit foi de -0,4 a -0,5V/ EAg/AgCl. Em todas as
rea??es observou-se o aumento na concentra??o de Al(OH)3 sob a forma de um gel / 2020-01-01
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/13027 |
| Date | 30 July 2012 |
| Creators | Cunha, Jardel Dantas da |
| Contributors | CPF:13893734449, http://lattes.cnpq.br/2791074318745945, Huitle, Carlos Alberto Martinez, CPF:01139059980, http://lattes.cnpq.br/2485073932883264, Melo, Jailson Vieira de, CPF:50073788449, http://lattes.cnpq.br/7275955550556570, Souza, Luiz Di, CPF:01925100880, http://lattes.cnpq.br/0589648773241934, Silva, Djalma Ribeiro da |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Ci?ncia e Engenharia do Petr?leo, UFRN, BR, Pesquisa e Desenvolvimento em Ci?ncia e Engenharia de Petr?leo |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/embargoedAccess |
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