Effect of gap size on flange face corrosion

Hakimian, Soorosh, Bouzid, Abdel-Hakim et Hof, Lucas A.. 2024. « Effect of gap size on flange face corrosion ». Materials and Corrosion-Werkstoffe Und Korrosion.
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Résumé

Bolted flanged joints play a critical role in offshore wind turbine towerstructures, serving as integral components that connect various sections of thetower. This research study employs electrochemical techniques to investigatethe effect of gap dimensions, which determine the crevice gap thickness andcrevice depth, on corrosion behavior of 321 stainless steel flange sample platesin a 3.5 wt% NaCl solution at 50°C. Gaskets are used in this study to creategaps between two flange surfaces. A novel fixture is utilized to simulate theapplied stress on the gasket, fluid flow within the fixture, and the geometricaspects of the gasket and flange. The findings reveal that increasing the gapthickness from 1.58 to 6.35 mm results in a rise in the general corrosion rate ofthe flange surface from 0.09 to 1.03 mm y−1, and crevice corrosion initiationtime increases from 0.23 to 3.12 h. Furthermore, reducing the crevice depth (d)from 7.49 to 0 mm leads to a decrease in the general corrosion rate from0.09 mm y−1to 0.04 μm y−1, and cases withd= 3.81 andd= 0 mm show noobservable crevice corrosion after potentiostatic tests.

Type de document:	Article publié dans une revue, révisé par les pairs
Professeur:	Professeur Bouzid, Hakim Hof, Lucas
Affiliation:	Génie mécanique, Génie mécanique
Date de dépôt:	17 avr. 2024 15:23
Dernière modification:	18 avr. 2024 19:29
URI:	https://espace2.etsmtl.ca/id/eprint/28542

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