Aplicação de técnicas eletroquímicas na determinação do potencial de corrosividade de ligas de alumínio em água produzida
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 th...
محفوظ في:
| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | |
| التنسيق: | doctoralThesis |
| اللغة: | por |
| منشور في: |
Universidade Federal do Rio Grande do Norte
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| الموضوعات: | |
| الوصول للمادة أونلاين: | https://repositorio.ufrn.br/jspui/handle/123456789/13027 |
| الوسوم: |
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| الملخص: | 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 |
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