black sol gel on Stainless Steel 1
Context of the NANOSOL project Transparent protection layer Top coat Top coat + protection Primer Metal Protection of organic layers Coating for home appliances Anti finger print coating Metal Functional coating Performance comparison with conventional coatings 2
Coating based on the Nanoxid product range: application by spray or roll coating Colloïdal solution SiO 2 liquid film application drying Black sol gel = Nanoxid (transparent) + carbon particles 3
Application on brushed stainless steel trial on Arceo Engineering roll coating line Coating thickness Aspect (color and gloss) 1 µm 5 µm The «metallic grinded look» is kept alive The aesthetics depend on the layer thickness : black bronze Gloss compared to grinding direction : Gloss parallel to grinding //: 40 Gloss perpendicular to grinding : 12 4
Mechanical properties Qualitative tests Adherence on flat surface and crossed surface : 100% adherence Standard tests Impact resistance: 18 J T-bend Excellent adherence on the substrate 5
Mechanical properties Test Erichsen: up to 6 mm Test Marciniak 13% deformation No cracks, no delamination No color change on deformed zones Ability for deepdrawing 6
Mechanical Properties : hardness Indentation: measurement of hardness and elasticity module For micrometric coatings control of the indentation depth at nanometric scale Nanoindentation: load ~100 mn, indentation depth ~ 1-2 µm Hardness calculation: Coating Hardness (Gpa) Young Module (Gpa) Anti finger print varnish 0,2 3-5 Black sol gel 0,2 4 304 steel : H= 3-5 GPa 7
Mechanical characteristics : tribologic properties Measurement of the friction coefficient tribometer pawn-disc Low friction coefficient: µ ~0,3 Good resistance to wear 8
Resistance to friction weight (0,25 to 1 kg) Observation quotation No scratches 0 Low density of scratches 1 Medium density of scratches 2-3 High density of scratches 4 Completely scratched 5 9
Référence Référence 10 AR // Référence 10 AR + 10 * back and forth with soft cloth scratches emanate from the scratching device soft cloth allows easy cleaning of the scratches 10
Corrosion resistance QCT Salt Spray Test QUVa + humidity > 4000 h (in progress) > 2000 h (in progress) > 4000 h (in progress) 11
Chemicals and Food resistance Food stuff 24h @ 23 C Food stuff 2h @ 23 C Food stuff 1h @ 70 C Chemicals 24h @ 23 C Chemicals 2h @ 23 C Milk Butter Lemon Ketchup Mustard Tomato sauce Tea Coffee Olive oil Ethanol Acetone Acetic acid CIF detergent NaOH Cola Salt water Certificate of compliance Safety of Toys EN71-3 Certificate of non migration as per EN-1186 (migration 0004-S) Temperature resistance 1h @ 170 C : OK 1h in boiling water : OK 12
Conclusions The ArenNano Black Stainless coating solution shows : a pleasant aesthetic finish respecting the grinded metallic appearance Resistance to wear and friction Bending and deepdrawing (13% Marciniak) abilities Resistance to food stuff and chemicals Typical applications are : Household goods, home appliances, kitchen decoration, indoor architecture Effective outdoor corrosion tests allow as well outdoor applications (tests ongoing). Arceo Engineering Ivoz-Ramet Belgium www.arceo-eng.com sales@arceo-eng.com 13