eco-friendly anaphoretic e-coating for corrosion
TRANSCRIPT
CONTACT: [email protected] (Project Coordinator)
Parque Científico y Tecnológico de Gipuzkoa · Pº Miramón, 196 20014· Donostia-San Sebastián (Gipuzkoa), Spain
www.cidetec.es
• 80 V and 60 s (20 cm2) were the best electrical conditions to obtain 20 µm, in which was obtained better corrosion resistance (NSS test).
• Curing conditions were evaluated., obtaining that 120°C and 140°C during 60 min were the best conditions to obtain a compact and
homogeneous layers.
• Few microns of anodizing can improve corrosion resistance
Next Steps: E-coat system is under comparison with CAA (Cr-VI), leading a complete analysis of their behaviour against corrosion.
IntroductionA development of an alternative treatment to chromic anodising based on anaphoresis that meets REACH
standards is the main goal of ECOLAND project. Anaphoresis (e-coating) consists of applying an organic coating
by immersion using electric current. It has the advantage of enabling painting without the need for preliminary
priming. The e-coating technology is based on reduction of application time while replacing with a single coat two
layers that usually contain Cr(VI) (substances with this element will be prohibited starting in 2024 to meet
European REACH regulations). It is expected to lengthen the useful life of the components treated by e-coating
in comparison with traditional anodised and painted systems.
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IDETEC
Pilot plant of e-coat system
M. Rosalina Pérez-García1, Marian Musgo1, Jorge Rodríguez1, M. Belén García-Blanco1, Peter Hope2 & Janet Hope2
1 CIDETEC. Parque Tecnológico de San Sebastián Pº Miramón 196, 20014 Donostia (Gipuzkoa), Spain.
2 LVH Coatings Ltd., Station Road, Coleshill, Birmingham B46 1HT, UK.
ECO-friendly anaphoretic e-coating
for corrosion resistance in
aeronautic applications
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e-e-
Al a
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- e-coating + water
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Test e-coat
Thickness (µm) 10 20 30
Dry-adhesion test(ISO 2409:2013) Grade 0 Grade 0 Grade 0
Solvent Resistance Rub-test (ASTM D4752) Pass Pass Pass
NSS (ISO 9227) > 200 h > 1200 h > 1000 h
Results & Discussion
Effect of e-coat thickness
Effect of temperature
Test Anodizing & e-coat
Thickness of anodizing (µm)
3 6 9
E-coat (µm) 10
Dry-adhesion test(ISO 2409:2013)
Grade 0 Grade 0 Grade 0
Solvent Resistance Rub-test (ASTM D4752)
Pass Pass Pass
NSS (ISO 9227) > 2000 h > 2000 h > 2000 h
Effect of anodizing & e-coat system
Excess of thickness = non uniform e-coatings
Thickness 10-30 µm = homogeneous e-coatings
WE: Al 7075 alloyCE: SS or Al alloy
10 µm 20 µm
30 µmIntrinsic anodic e-coat layer = 400 nm
Zoom
100 °C 60 min120 °C 60 min140 °C 60 min
It seems like not completely consolidated
Test e-coat
Curing conditions 100 °C
60 min
120 °C
60 min
140 °C
60 min
Solvent Resistance Rub-test (ASTM D4752) No-OK Pass Pass
NSS (ISO 9227) 700 h > 1200 h > 1200 h
3.7 µm 8.2 µm 14.1 µm
Anodizing conditions: 2.2 M H2SO4, 16 V,
6, 12 and 21 min respectively
Find out more!: www.cidetec.es/en/projects/surface-engineering-6/ecoland-4
Topic Manager:Project Coordinator: Partners:
This project has received funding from the Clean
Sky 2 Joint Undertaking under the European
Union’s Horizon 2020 research and innovation
programme under grant agreement No 785412.
Conclusions