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Univ. Paris-Saclay

Sujet de stage / Master 2 Internship

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Predicting corrosion by analysis of protective layers

Contact: CORNUT Renaud, , renaud.cornut@cea.fr, +33 1 69 08 65 88
The corrosion of metallic structures represents a cost estimated at about 4% of the world GDP. A new strategy based on the analysis of the permeability of anti-corrosion coatings, such as the one developed in our laboratory, can find its place in the many sectors whose products are impacted by corrosion. The proposed internship focuses on the development of this analysis method to make it compatible with the targeted industrial use.

Translated with www.DeepL.com/Translator (free version)
Possibility of continuation in PhD: Oui
Deadline for application:14/03/2023

Full description:
Corrosion of metallic structures is a problem in a large number of industrial fields (aeronautics, renewable energies, transport and mobility, engineering structures, etc..). It represents an estimated cost of about 4% of the world GDP. In order to slow down the corrosion process as much as possible, the most common strategy is to cover the surfaces with air and waterproof coatings. But after protecting a metal part with an anticorrosion coating to increase its lifetime, it is currently difficult to know:
(i) whether the coating is of good quality at the time of manufacture
(ii) whether the coating is still protective after a certain period of use.

In this context, the CEA/DRF/LICSEN, based in Saclay, has developed a method to evaluate the quality of an anticorrosion coating. The strategy is based on a specific know-how in electrochemical microscopy, which has been implemented in an original way to simplify the apparatus and to develop protocols that allow access to the permeability of an anticorrosion coating in typically 1 hour and in a non-destructive way.

A new strategy based on the analysis of the permeability of anticorrosion coatings as developed in our laboratory can find a place in the many sectors impacted by corrosion. It is now necessary to continue this work in order to i) explore other configurations (non-flat samples such as cardiac stents, non-vertical operating conditions, etc.) and thus open up new possibilities and ii) refine the protocols for an implementation compatible with the external conditions (analysis time, reproducibility, etc.)

Depending on the candidate's profile and the needs of the moment, different activities are therefore possible. This internship will also be an opportunity to test the new prototypes designed specifically for the project, and to work on industrial samples provided by various partners in the aeronautical and medical fields.

As this internship has a clear industrial focus, the student must have a taste for experimentation and applied research. Basic notions in electrochemistry - experimental and theoretical - will allow to start quickly the work, then to obtain tangible and successful results during the internship.
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