SAA-SEAL

Corrosion protection of Aluminium unpainted parts: development of an appropriated Cr free sealing process on thin SAA layer (≤5 µm)

 Coordinatore CEST Kompetenzzentrum fur elektrochemische Oberflachentechnologie GmbH 

 Organization address address: Viktor-Kaplan-Strasse 2
city: Wiener Neustadt
postcode: 2700

contact info
Titolo: Dr.
Nome: Erich
Cognome: Kny
Email: send email
Telefono: +43 6646207678
Fax: 4326220000000

 Nazionalità Coordinatore Austria [AT]
 Totale costo 239˙981 €
 EC contributo 179˙985 €
 Programma FP7-JTI
Specific Programme "Cooperation": Joint Technology Initiatives
 Code Call SP1-JTI-CS-2011-03
 Funding Scheme JTI-CS
 Anno di inizio 2012
 Periodo (anno-mese-giorno) 2012-05-01   -   2014-04-30

 Partecipanti

# participant  country  role  EC contrib. [€] 
1    CEST Kompetenzzentrum fur elektrochemische Oberflachentechnologie GmbH

 Organization address address: Viktor-Kaplan-Strasse 2
city: Wiener Neustadt
postcode: 2700

contact info
Titolo: Dr.
Nome: Erich
Cognome: Kny
Email: send email
Telefono: +43 6646207678
Fax: 4326220000000

AT (Wiener Neustadt) coordinator 179˙985.00

Mappa


 Word cloud

Esplora la "nuvola delle parole (Word Cloud) per avere un'idea di massima del progetto.

anodized    ni    solutions    water    resistance    micro    layer    al    corrosion    anodizing    co    layers    fluorides    cr    containing    sealing      

 Obiettivo del progetto (Objective)

'Corrosion of Al has to be counteracted by first anodizing the Al parts and applying further protective coatings. During anodizing, Al reacts with the electrolyte and a layer of aluminium oxide is formed, which is highly porous and is subject to corrosive attack. Therefore, anodized Al is normally further processed with a sealing as a final step. Sealed SAA industrial processes providing thicker layers (~10 µm) are already in the market, but the missing step is to develop a well-suited process for thin layers (≤ 5 µm) that meets the corrosion resistance requirements. Hot water sealing is one of the widely used methods. However in order to close (seal) the pores in the anodized layer for corrosion protection a process involving boiling water containing chromate is still commonly used. Cr(VI)-based sealing solutions have been used for several decades, but remain one of the most effective and commonly-used methods to improve corrosion resistance of anodized Al. Alternative sealing methods have also been proposed, e.g. with Ni(II), Co(II), Ni(II) Co(II), rare earth salts, alkali metal fluorides, alkanolamine phosphonates, Cr(III), fatty acids, silicates, etc. It should be noted that Ni(II), Co(II) and fluorides are not without health implications, whereas most organic molecules would be expected to have limited lifetimes under the extreme conditions (UV radiation, low pressure, large temperature range) experience by commercial aircraft during operation. Therefore, of the previously identified approaches Cr(III)-containing or silicate-forming sealing solutions are preferred options. Encouraging results were obtained with deposition of films of CeO2x2 H2O, though the performance still does not equal those of CCC. Characterization with methods such as SEM, EIS, AFM-SECM will lead to more detailed understanding of sealing and corrosion mechanisms and therefore optimizing sealing parameters with respect to corrosion resistance and minimized energy consumption.'

Altri progetti dello stesso programma (FP7-JTI)

SNRPBBEARING (2013)

NTN-SNR Proposal for Propellers Blades Bearings Design and Manufacturing

Read More  

WELDMECS (2013)

Welding Metallurgy and Cracking in Superalloys

Read More  

NLFFD (2010)

NLF Starboard Leading Edge & Top cover design & manufacturing Trials

Read More