CO-PROCLAM

CO-PROCLAM
Titre :	COrrosion PROtective Coating on Light Alloys by Micro-arc oxidation
Budget :	399 k€
Subventions :	FP7-JTI (291 k€)
Sous-programme :	JTI-CS-2010-1-ECO-01-003
Type de contrat :	Joint Technology Initiatives
Début :	1er avril 2011
Fin :	31 mars 2013
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CO-PROCLAM est l'acronyme du projet européen COrrosion PROtective Coating on Light Alloys by Micro-arc oxidation, qui a pour référence sur le service CORDIS 270589.

Financé dans le cadre FP7-JTI, ce projet est rattaché à l'initiative Clean Sky, qui cible le secteur de l'aéronautique.

English description

Note : Les objectifs suivants sont repris de la fiche du projet sur Cordis

Objective

Since it does not use any CMR or pollutant compounds, micro-arc oxidation (MAO) also known as plasma electrolytic oxidation (PEO) is a promising technique to replace conventional anodising processes such as chromic acid anodising or hard anodising to improve the mechanical and corrosion properties of valve metals such as aluminium or magnesium and their alloys.

Though it has been known for many years, this technique is however still not well adapted to comply with the aeronautical requirements. In fact, one of the major challenge is to grow thin oxide layers (< 10 µm), which exhibit low roughness (Ra < 1 µm) and good thickness homogeneity, the latter being of prime importance when processing work pieces with complex shape.

The present program aims at developing a particular technology of micro-arc processing of Al and Mg alloys in order to achieve MAO corrosion protective thin layers that comply with the aeronautical requirements while minimizing energy consumption.

A detailed investigation of the process parameters and their influence on the grown ceramic layer will be coupled with the characterization of the layers regarding their microstructure and properties focusing on corrosion protection efficiency.

Moreover using fast video imaging and time-resolved optical emission spectroscopy coupled with electrical measurements, a detailed study of the physics of the micro-discharges resulting from the dielectric breakdown will be carried out to shed light on the physico-chemical mechanisms that sustain the layer growth. It is thus expected to determine the response of the micro-discharges, and consequently of the ceramic layer characteristics, to a modification in the process parameters. The perfect knowledge of these mechanisms will then help controlling the process through the management of the micro-discharges.

The work is planed to be performed by a consortium of two partners one research institution, one supplier of micro-arc coatings and organized around five work packages. It is intended that a part of the work will be subcontracted for investigating some process parameters unavailable within the partner's facilities.

 

Les partenaires du projet

Coordinateur du projet

• Institut Jean Lamour - CNRS - Nancy (Lorraine, France) - Contact : Anne-Florence Remy

Partenaires

• Galvanoplastie industrielle toulousaine SA (G.I.T.) - Cugnaux (Midi-Pyrénées, France)

Financement

• Coût total du projet : 399 220 €
• Subvention de la Commission européenne (programme FP7-JTI) : 291 675 €

Dates importantes

• Date de début : 1^er avril 2011
• Date de fin : 31 mars 2013

Voir aussi

Liens externes

• Le site officiel du CNRS