EUR O INOX SEMINA R " INNO VAT IO N IN STAINL ES S STE EL FABR ICA TIO N" - MAAS T R ICH T, NL - 30 NOV 2011

EUR O INOX 2011 1

ColouringOptionsforStainlessSteel

Alenka Kosma,M.Sc.EuroInox,Brussels

Maastricht,30November 2011

Agenda

1 Introduction1. Introduction2. Electrochemicalcolouring3. Surfaceblackening4. PVDcoatingsandsputteredcolour5. Coilcoating6. Painting7. Metalliccoatingsg8. Newtechniques9. Conclusion

EUR O INOX SEMINA R " INNO VAT IO N IN STAINL ES S STE EL FABR ICA TIO N" - MAAS T R ICH T, NL - 30 NOV 2011

EUR O INOX 2011 2

Alloyingchromiumtothesteelremarkablyincreaseschemicalresistance

...andincreasesthepassivelayeronstainlesssteels

EUR O INOX SEMINA R " INNO VAT IO N IN STAINL ES S STE EL FABR ICA TIO N" - MAAS T R ICH T, NL - 30 NOV 2011

EUR O INOX 2011 3

Allstainlesssteelfamiliesarenotequallyappropriatefordifferentcolouringtechniques

BasicstainlesssteelfamiliesAustenitic Austenitic

Ferritic Martensiticandprecipitationhardening

Duplex

2.Electrochemicalcolouring

Chemical processChemicalprocess Chromicandsulphuricacids Hotalkalinesolutioncontaining

strongoxidisingagents Increasedpassivelayer(from

0.02mto0.36m) ) Widerangeofcolourscanbe

achieved

EUR O INOX SEMINA R " INNO VAT IO N IN STAINL ES S STE EL FABR ICA TIO N" - MAAS T R ICH T, NL - 30 NOV 2011

EUR O INOX 2011 4

2.Electrochemicalcolouring

Nopigments/nofading Austeniticsmostly Ferriticsonlydarkgrey

2.Electrochemicalcolouring

Not for hightraffic areasNotforhigh trafficareas irreparableifdamagedby

scratching,fabricationorcorrosion

Joiningtechniques NO welding,brazingg g YES adhesivebonding,

screwing,riveting

Sources:InoxColorGmbH,Walldrn(D)(top),SteelColorS.p.a,PescaroloedUniti(I)(below)

EUR O INOX SEMINA R " INNO VAT IO N IN STAINL ES S STE EL FABR ICA TIO N" - MAAS T R ICH T, NL - 30 NOV 2011

EUR O INOX 2011 5

3.Surfaceblackening

Chemical processChemicalprocess Immersioninamoltensalt

bathofsodiumdichromate Thinoxidefilmisformed Itdoesnotpeel Veryresistanttoheating

Sources:SteelColor S.p.a.,Pescarolo EdUniti (I)(left),

3.Surfaceblackening

Not only aethetic, but also functionalNotonlyaethetic,butalsofunctional Canbemoderatelydeformed Good resistancetoabrasion

Source: EnergieSolaire,Sierre(CH)

EUR O INOX SEMINA R " INNO VAT IO N IN STAINL ES S STE EL FABR ICA TIO N" - MAAS T R ICH T, NL - 30 NOV 2011

EUR O INOX 2011 6

4.PVDcoating

Coating material vaporisedCoatingmaterialvaporised,thinfilmdeposition

Besttechniqueforthinfilms Porefreeanddense

Source:HansHollein Atelier,Vienna(A),(right)

4.PVDcoating

For exposed and agressiveForexposedandagressiveapplications

Theunderlyingtextureisvisible

Colourdamaged,ifattackedagressively

Welding priortocoatingg p g

Source:InoxColor,Walldrn(D),HansHolleinl ( ) ( h )

EUR O INOX SEMINA R " INNO VAT IO N IN STAINL ES S STE EL FABR ICA TIO N" - MAAS T R ICH T, NL - 30 NOV 2011

EUR O INOX 2011 7

5.Coilcoating

Industrial inline processIndustrialin lineprocess Extensivecolourrange Clearvarnishes Coloursdonotincrease

thecorrosionresistance Nonweldable

Source:CentroInox,Milano(I)

5.Coilcoating

For nonglaring applicationsFornon glaringapplications Hightrafficroadtunnels

Source:CentroInox,Milan(I)

EUR O INOX SEMINA R " INNO VAT IO N IN STAINL ES S STE EL FABR ICA TIO N" - MAAS T R ICH T, NL - 30 NOV 2011

EUR O INOX 2011 8

5.Coilcoating

For antifingerprintForanti fingerprintapplications

Clearvarinshesforwhitegoodappliances

6.Painting

For aesthetic reasonsForaestheticreasonsmostly

EUR O INOX SEMINA R " INNO VAT IO N IN STAINL ES S STE EL FABR ICA TIO N" - MAAS T R ICH T, NL - 30 NOV 2011

EUR O INOX 2011 9

6.Painting

For increased visibilityForincreasedvisibility Cleanlinessisakeyelementinsuccessfulpaintingofstainless

steel

Source:CentroInox,Milan(I)

6.Painting

Userfriendly options for persons with impaired visibilityUser friendlyoptionsforpersonswithimpairedvisibility

EUR O INOX SEMINA R " INNO VAT IO N IN STAINL ES S STE EL FABR ICA TIO N" - MAAS T R ICH T, NL - 30 NOV 2011

EUR O INOX 2011 10

7.Metalliccoatings

Primarily used for roofingPrimarilyusedforroofingandrainwatergoods

Donotimprovecorrosionresistance

Easierfieldpaintingprocessthanpaintingbarestainlesssteel

Source:Spenglerdirect,Ermatingen (CH)

7.Metalliccoatings

TincoatedTin coated Coppercoated

EUR O INOX SEMINA R " INNO VAT IO N IN STAINL ES S STE EL FABR ICA TIO N" - MAAS T R ICH T, NL - 30 NOV 2011

EUR O INOX 2011 11

8.Newtechniques

Digital printing offersDigitalprintingoffersanycolourorpicturetobeapplied

Source:Albrigi,StallavenadeGrezzana(Verona)(I)

Conclusions

many different options and techniques availablemanydifferentoptionsandtechniquesavailable materialselectionshouldbebasedonexposure data Colouringstainlessdonotenhancecorrosionresistance

likeinthecaseofcarbonsteel

EUR O INOX SEMINA R " INNO VAT IO N IN STAINL ES S STE EL FABR ICA TIO N" - MAAS T R ICH T, NL - 30 NOV 2011

EUR O INOX 2011 12

www.euroinox.org