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Issue 42, 2019, Issue in Progress
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Bifunctional coatings: coupling an organic adhesion promoter with an anticorrosion inorganic layer

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Abstract

In this work, a multifunctional non-toxic chromium free treatment is proposed. Hexavalent chromium, largely used for anticorrosion surface treatments of aluminum alloys in aeronautics, will soon be completely banned due to its high toxicity (European REACH regulation) and new solutions are required. Here, in a first step, a polymeric film was grafted at the aluminum surface by the surface induced reduction of a diazonium salt. In a second step, the grafted surface was submitted to an anodization treatment, forming a thick aluminum oxide layer protecting the underlying metal against corrosion. No change in the organic coating was detected after the second step of the process. This leads to a multilayer coating, which provides competitive results regarding both the adhesion of paint and corrosion protection.

Graphical abstract: Bifunctional coatings: coupling an organic adhesion promoter with an anticorrosion inorganic layer

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Supplementary files

Article information


Submitted
15 May 2019
Accepted
19 Jul 2019
First published
02 Aug 2019

This article is Open Access

RSC Adv., 2019,9, 24043-24049
Article type
Paper

Bifunctional coatings: coupling an organic adhesion promoter with an anticorrosion inorganic layer

A. Doublet, M. Kjellberg, B. Jousselme, M. Pinault, G. Deniau, R. Cornut and G. Charrier, RSC Adv., 2019, 9, 24043
DOI: 10.1039/C9RA03657A

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