Latest achievements in the field of modern surface treatment Thomas - PowerPoint PPT Presentation

Latest achievements in the field of modern surface treatment Thomas STIMPFLING, Florent DELIANE, Konstantin SIPOS MMP 2015 Metallic Materials and Processes : Industrial Challenges Deauville (France) November 26th 2015 RESCOLL, Société de Recherche – 8 allée Geoffroy Saint-Hilaire - CS 30021 F-33615 Pessac CEDEX, FRANCE Phone : + 33 547 74 69 00 Fax : + 33 547 74 80 13 e-mail : Thomas.stimpfling@rescoll.fr www.rescoll.fr

Rescoll in few words… R&D Bonding and Bonded Polymers and assemblies Composites Surface Fire Treatment Engineering Synthesis of Regulatory affaires Chemicals Analysis Audits and Testing Expertises Machining Production Processes 2

Rescoll in few words… 4 business units B to B Punctual basis Collaborative Projects Year contracts Internal Research Analysis Vouchers Experts for the court EWF bonding Experts for the EC University REACH and GHS Experts Customised trainings 2 affiliates units RMG STILZ Manufacturing Chimie Scale-up Machining Production 2

Rescoll – Surface division activities  Related topics :  Surface preparation of materials.  Adhesion.  Processing :  Functional primers.  Functional coatings.  Paints.  Comprehensive approach comprising different aspects:  Multi- skills (Formulation, Implementation, Characterization, …)  Multi-topics.  Multi-materials.  Interdisciplinary. Innovation Prototyping Testing • Production • Idea • Scaling • Faisability • Qualification R&D Product Knowledge Research 4

Surface treatments: advantages vs. inconveniences Advantages Inconveniences Metal - Toxicity of components (Cr VI …) - Homogeneity - Surface texturation and - Control of components • Solvents activation - Effluents reprocessing - Improvement surface properties - VOC Degreasing (bonding, corrosion) - Surface functionalization (coating) • Acidic etching Chemical etching Cr VI • Anodisation • Chemical conversion Conversion Dead-line REACH = 2017 • VOC Alternatives are needed !!! • Fillers Coatings 5

Coating systems: News challenges… Economic Environmental Aspect Aspect  Simplifications of process  Legislations compliancy  Lighten the structure  VOC reduction  Reduction of maintenance steps  Effluents reprocessing Coatings Challenges Multi- News Processes Functionality   Anticorrosion Biocide   Intumescent Dye   And so … Lubricant  Implementation processes 6

Aircraft applications Corrosion resistance & Corrosion resistance Fire resistance adhesion promoter Adhesion promoter Thermochromic Corrosion resistance Wear resistance biocide 7

Thermochromic coating  Next generations of Aircraft extand the use of Organic Matrix Composites  But OMCs:  Sensitive to temperature change  High temperature environments are critical  The use of OMCs are critical in reactor zone due to backfiring  There is a need to know that in case of backfiring :  What temperature has been shown by the OMCs  If the CMO’s can be repared or replaced  Concept: Thermochromic sensitive coating T Fourmi 2 Partners: Rescoll Mapaéro 8

Fire resistant coating  Fire resistant evaluation (ISO 2685 - flame 1200 ° C )  Substrate: AA 5xxx + Top-Coat RESCOLL.  Compatible with aeronautic applications (T ° >200 ° C / fluids compatibility)  Performance : Evolution of temperature on non exposed surface drilling ≈ 50s 1000 900 800 700 Température (°C) 600 Drilling ≈ 280s 500 400 300 200 100 0 0 50 100 150 200 250 300 350 Temps (s) 2 Partners: Rescoll 9 Mapaéro

High temperature resistant coating Thermal stress area Paint degradation Loss of aesthetic  Development of thermal resistant coating Up to 200 – 300 ° C   Low VOC (< 420 g/L)  Regulatory compliant  Implementation by spraying with low thermal curing 3 Partners: Rescoll Clochette Mäder 10 Airbus helicopter

Wear-resistant coating  Enhancement of fatigue resistance and durability under high loads for bearings  Hybrid lubricant coating Sol-Gel chemistry  No modification of roughness  Scratch and abrasion resistance Properties Target Results  Lubricant COF < 0.54 0.22 0.05  Roughness 0.15 µm 100°C  Temperature < 180°C processing  Weak deterioration of coating after 10 4 cycles at 2 N 4 partners: Rescoll PIMM Fersa TTC group 11

Adhesion promoter coating  Coating for improvement of bonding properties on composite  Clean one-stage process, free VOCs and small particle emissions  Coating properties  Adhesion promoter (covalent bonding) Sol-Gel chemistry  Degreasing ability of the primer « Clean » substrate « Dirty » Coating of Primer Adhesive substrate primer curing CF Composite CF 90%CF 50%CF/ 50% AF Adhesive Adhesive Adhesive AF Degreasing Reference Rescoll A Degreasing Rescoll B with Rescoll B with Rescoll A 12 Parteners: Rescoll Composite aragon Resoltech Aimplas Synthesites Ecoinnova Muegge Polymec Acciona 12 Fraunhofer RTU Alkè

Adhesion promoter & anticorrosive coating  Adhesion promoter and anticorrosive coating for bonding assemblies  Substrate: AA 2xxx, 5xxx and 7xxx Adhésive Primer AA 7xxx Commercial Rescoll Corrosion resistance OK OK (336 h NSS (ISO 9227)) KO OK Adhesion property Cohesive failure 30 25 Stress @ break (MPa) Adhésive Rescoll 20 failure 336h NSS 15 Adhésive (ISO 9227) failure 10 5 0 13 Substrate Commercial Rescoll

Anticorrosive & biocide coating  Multifunctional coating dedicated to gas tank . •  Passive protection Concept: Organic part: polyaddition Epoxy/amine Inorganic part: Sol-Gel chemistry • Active protection Corrosion inhibitor Biocide agent No pitting after 3500 h NSS FFC after 1056h 8 Partners: Rescoll Airbus Cirimat SMILE Mapaero Dassault aviation LCPO 14 L’ electrolyse EADS

Anticorrosive coating  Anticorrosive coating dedicated to structural elements (fuselage)  Concept S B Q R NSS (ISO 9227) 336h Effet barrière Résistance à la corrosion Barrier effect Corrosion resistance 10000000 10000000 0.5 M NaCl 1000000 1000000 100000 |Z| ( Ω .cm²) |Z| ( Ω .cm²) 10000 EIS 100000 1000 100 10000 10 1 1000 0 2 6 9 14 23 0 2 6 9 14 23 Temps d'immersion (jours) Temps d'immersion (jours) B R Q S B R Q S  Hybrid material = Significant improvement of corrosion properties  15 Importance of matrix precursors

Anticorrosive coating  ACET = Accelerated Cyclic Electrochemical Test NSS ACET (ISO 9227) - Standard -Rapid (24h) Avantages -Quantitative - Slow (few months) - Exposed surface Inconveniences - Qualitative ACET (24h) equivalent to 1000 h of NSS  Similar trends  Differences due to: • Thickness • Localized matrice defects • Cathodic polarization 16

Anticorrosive coating NSS (ISO 9227) NSS (ISO 9227) FFC (EN 3665) 1500 h 1000 h 1000 h 1 rst pit > 1000 h Self-healing effect  Corrosion resistance • Passive protection Barrier property • Active protection Self-healing effect  Excellent filiform corrosion resistance • Transversal: L max < 1 mm Cr VI L max ≤ 2 mm • Longitudinal: L max = 0,5 mm 17

Conclusion  News coating systems have to consider: • Simple process • Compliance to regulatory • Environmental friendly • Low cost  Multi-functional coatings = attractive solutions • Versatility of composition  Chemistry routes  Fillers • Easy to handle  Spray deposition  According to usual system • Reduction of number of layers with increasing functionalities Chemistry route « Green » Multi-functional Coating Fillers 18

Acknowledgements  For financial supports,  And you for your attention… Dr. Thomas Stimpfling R&D Research Engineer thomas.stimpfling@rescoll.fr 19