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Cr Free REAL SIGNED

Development and testing of innovative Cr Free solution for REmoval of Anodic Layers

Total Cost €

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EC-Contrib. €

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Partnership

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Project "Cr Free REAL" data sheet

The following table provides information about the project.

Coordinator
CEST KOMPETENZZENTRUM FUR ELEKTROCHEMISCHE OBERFLACHENTECHNOLOGIE GMBH 

Organization address
address: VIKTOR KAPLAN STRASSE 2
city: WIENER NEUSTADT
postcode: 2700
website: n.a.

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Austria [AT]
 Total cost 499˙062 €
 EC max contribution 499˙062 € (100%)
 Programme 1. H2020-EU.3.4.5.6. (ITD Systems)
 Code Call H2020-CS2-CFP08-2018-01
 Funding Scheme CS2-RIA
 Starting year 2019
 Duration (year-month-day) from 2019-04-01   to  2021-03-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    CEST KOMPETENZZENTRUM FUR ELEKTROCHEMISCHE OBERFLACHENTECHNOLOGIE GMBH AT (WIENER NEUSTADT) coordinator 390˙000.00
2    MECAPROTEC INDUSTRIES FR (MURET) participant 109˙062.00

Map

 Project objective

In 2024 the use of hexavalent chromium (Cr(VI)) will be forbidden by REACH regulation. Many studies have been carried out to replace Cr(VI)-based coatings for lightweight metals such as aluminium and have resulted in the development of new protective layers (SAA, TSA, Cr(III)-conversion coating). However, the removal of protective oxide layers is still performed with Cr(VI)-based stripping processes. Cr(VI)-free stripping with NaOH leads to deterioration of the substrate if the process time exceeds the specification of the very narrow process window. The Cr Free REAL project aims to develop an innovative process for Cr free removal of anodic layers and conversion layers, which does not deteriorate the aluminium substrate within an applicable process window. Commercially available or literature mentioned Cr(VI) free stripping agents will be tested and evaluated. In the proposed approaches, it is planned to develop innovative acidic or alkaline stripping agents containing additives. Corrosion inhibitors (e.g. oxoanions, cerates, thiourea to prevent corrosive attack during the stripping process), accelerators (e.g. nitrates, glycolic acid to enhance the removal of the oxide layer), surfactants and complexants (to help obtaining a complete and uniform removal of the oxide layer and for increase of bath stability) will be employed. The best performing stripping process will be tested on six types of machined and cast aluminium alloys for removal of Cr(VI)-based and Cr(VI)-free protective layers. The experiments will be performed on lab scale and pre-industrial samples, including complex-shaped parts with a size up to 400*300*200 mm. Specimens which are re-treated with Cr(VI)-free anodic and conversion coatings shall exhibit a corrosion stability with no pits after 500 hours SST and a low fatigue drop, which shall be lower or equal to specimens treated with state-of-the-art processes.

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The information about "CR FREE REAL" are provided by the European Opendata Portal: CORDIS opendata.

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