Cr free anticorrosion primers and treatments

Transcription

1 Cr free anticorrosion primers and treatments MAPSIL SILICo and MAP AQ PS 3 rd Electronic Materials and Assembly Processes for Space (EMPS) Workshop Genoa 21 st March 2012 Guillaume SIERRA R&D Manager +33 (0) g.sierra@map- coatings.com Summary Primers and surface treatments to be replaced Space technical specifications MAPSIL SILICo results Conclusion 2 1

2 Anticorrosion Primers Objectives Anticorrosion primers Primer Application Use Substitution MAP AERO P Launcher Anticorrosion MAPSIL SILICo high thickness MAP AERO WP Launcher Anticorrosion MAPSIL SILICo high thickness PS Primer Satellite Adherence/ Anticorrosion* Phosmap 11 Primer Satellite Adherence/ Anticorrosion* MAP AQ PS Silane primer: PSX and E MAPSIL SILICo low thickness * Adhesion need more important than anticorrosion one 3 Silane primers: PSX and E already available MAPSIL SILICo: 2 thicknesses depending on the anticorrosion level needed MAP AQ PS: Replacement of PS primer Surface treatments Objectives Surface treatment Treatment Application Use Substitution Alodine 1200 Launcher / Satellite Anticorrosion MAPSIL SILICo low thickness BR 127 Launcher / Satellite Anticorrosion/ Bonding MAP AQ PS 4 MAPSIL SILICo: Formulation development finalized Industrialist trials to be done MAP AQ PS: Formulation feasibility shown onto internal trials Kick- off the CNES R&T (Qualification) on January

3 Anticorrosion: thin and thick films Anticorrosion protection for space applications Typical requirements Thin film anticorrosion protection (Alternative to Alodine 1200 application) Thick film anticorrosion protection (Alternative to Chromated primers) Damp Heat (According to ISO6270 norm) T = 85 C RH= 95% Salt Spray (According to ISO9227NSS and ASTM B117 norm) T = 35 C NaCl= 5% Salt Spray (According to ISO9227NSS and ASTM B117 norm) T = 35 C NaCl= 5% Corrosion:< 5 pits for a 130mm x 80mm area Duration:2 weeks minimum Electrical resistance: <5mW (ASTM D257-07norm) Corrosion:< 5 pits for a 130mm x 80mm area Duration:72h minimum Electrical resistance: <5mW (ASTM D norm) Corrosion: no damage over 3mm on both sides of the cut (crossed cut) Duration: >500h (Al) 168h(Steel) Electrical resistance: no requirement 5 Aluminum alloys tested: 7075T0, 6061T6, 2024T3 Surface preparation: Cleaning with IPA Mass applied :1.5 g/m² to 3.0g/m² Aluminum alloys tested: 7075T0, 6061T6, 2024T3 Other: Steel Surface preparation: Cleaning with IPA Thickness: >9µm MAPSIL SILICo Alternative to Alodine 1200 application: Spray application Low thickness (2 4 µm) Substrate Salt spray test Damp heat test Status A2024- T3 100 h > 2 weeks A7075- T0 500 h > 2 weeks A6061- T6 200 h > 2 weeks 6 3

4 MAPSIL SILICo Alternative to Alodine 1200 application: Spray application Low thickness (2 4 µm) Evolution of surface resistivity versus thickness Substrate Surface Treatment Thickness (µm) Surface resistivity (kω/ ) A7075- T0 MAPSIL SILICo A2017- T4 Alodine Surface resistivity was measured according to MAP 006/AQ/92/NI standard Remark : Alodine 1200 (thick layer) electrical resistance is about 400 kω/ with the same method MAPSIL SILICo Alternative to Chromated primers (Launcher application) Spray application High thickness Substrate Thickness (µm) Salt spray test Status A2024- T3 42 > 500 h A7075- T > 1500 h A6061- T6 In progress In progress In progress Steel 40 > 200 h 8 4

5 MAPSIL SILICo MAPSIL SILICo was developed to provide a Chromium free, corrosion protection for light aluminum alloys and to be covered by thermal control paints and antistatic paints One product achieves the performances needed depending on the thickness application: MAPSIL SILICo: For launcher use, applied in thick layer (> 10 µm) to provide a good corrosion resistance on aluminum alloys and steel For satellite use, applied in low thickness (2-6 µm) to provide electrical conductivity For replacement of Alodine 1200, applied in low thickness (2 µm) to provide electrical conductivity 9 Already qualified by CNES with white antistatic coatings: CNES reports (In progress with ESA) DCT/TV/TH/ (PU) DCT/TV/TH/ (Silicone) DCT /TV/TH/NT (PU) Conclusion Cr free anticorrosion primers and surface treatments : MAPSIL SILICo available for qualification MAP AQ PS expected for June 2012 Primer Application Use Substitution Formulation status MAP AERO P Launcher Anticorrosion MAPSIL SILICo high thickness MAP AERO WP Launcher Anticorrosion MAPSIL SILICo high thickness Qualification planned ESA / NASA PS PRIMER Satellite Adherence/ Anticorrosion Phosmap 11 Primer Satellite Adherence/ Anticorrosion MAP AQ PS In progress CNES MAPSIL SILICo low thickness Silane primers: PSX, E CNES 10 Pre- treatment Application Use Substitution Formulation status Alodine 1200 Launcher / Satellite Qualification planned Anticorrosion MAPSIL SILICo low thickness ESA/NASA ASTRIUM BR 127 Satellite Bonding MAP AQ PS In progress TAS 5

6 coatings.com Elisabeth Laurent - CNES Quality and Materials Engineering +33 (0) elisabeth.laurent@cnes.fr Stéphanie Remaury CNES Materials and Coatings Laboratory +33 (0) stephanie.remaury@cnes.fr Serge Reymond Launcher & EMI R&D +33 (0) s.reymond@map- coatings.com 11 Guillaume Sierra - MAP R&D Manager +33 (0) g.sierra@map- coatings.com 6