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Tenue à la corrosion de structures assemblées par déformation à froid

Abstract : Nowadays continuous hot-dip galvanizing is widely used in metallic structures to protect steels against corrosion. Zinc provides a protective barrier thanks to the for-mation of a surface oxide and a sacrificial protection effect. However, structure manufacturing processes or mechanical assemblies by plastic deformation can create damage affecting the corrosion performance of the coating.The objective of the present work is to study changes of corrosion resistance induced by plastic deformation using immersion and climatic chamber tests. Three different coatings were chosen. A zinc coating used as a reference, a Zn-Al-Mg coating in which the addition of magnesium and aluminum allows a better resistance to corrosion and finally a Zn-55Al coating chosen for its very good durability in aggressive environment in Because of the large amount of aluminum present in its composition.
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Submitted on : Tuesday, March 13, 2018 - 4:43:08 PM
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  • HAL Id : tel-01730922, version 1

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Mohamed Biskri. Tenue à la corrosion de structures assemblées par déformation à froid. Science des matériaux [cond-mat.mtrl-sci]. Université de Bordeaux, 2017. Français. ⟨NNT : 2017BORD0644⟩. ⟨tel-01730922⟩

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