1. Workshop on Hazardous Substances Affecting Metallic-Coated Steel and Other Metals
May 23, 2007

2. Henkel – RoHS Compliant Passivate Discussion
Agenda:
Position on RoHS
Products Discussion
Offerings
Corrosion performance
Field experience
References

3. Henkel Position on RoHS
Electrical and electronic equipment (not all end users)
Appliances
Computers
Televisions, video recorders
Hexavalent Chromium (CrVI) is critical element for metal passivation treatments listed in RoHS regulation
Must contain less than (0.1%) 1000 ppm. Hexavalent chromium or contain no intentionally added hexavalent chromium in any homogeneous layer
Henkel position is that passivate coatings do not become a homogeneous layer with substrate, but, the discontinuous layer of the passivate. (IBM agrees with this position).
Chromium free products are compliant simply because there is no chrome present
Chromium III (trivalent) products are compliant in both the product and as-dried surface since Cr(VI) is below 1000 ppm and no Cr(VI) is intentionally added.
Conversion of Cr(III) → Cr(VI) will not happen under “normal” circumstances
PH≥14 or extreme oxidation are required
Practical basis, Cr(VI) not present during life-cycle of the coated materials.

4. Hexavalent Chrome-Free Passivation Offerings
Three approaches:
Non-chrome containing inorganic passivate
Trivalent chrome inorganic passivate
Thin organic coating non-chrome containing (acrylic coatings)

5. Hexavalent Chromium Containing Inorganic Passivates: “Chemtreats”
Typical coating weight: 1.0 – 2.0 mg/sq.ft. Cr
Applied by flood squeegee and dried by hot air dryer
Corrosion performance by neutral salt spray (NSS): 96+ Hrs.
“Wet” corrosion tests: 800+ Hrs.
Low cost, good corrosion prevention
“Non-Paintable”

6. Henkel Passerite 5004 W Chromium-Free Inorganic Passivate
Major Coating Constituents
Molybdenum
Titanium
Phosphate
Fluoride
Organic Polymer

7. Chrome-Free Inorganic Passivate
P-5004 W
Chrome-Free Inorganic Passivate
Application
Bath Concentration 20%-100% (Dependent On Coater) % is Typical
Run as Flood or Dip/Squeegee or Chemcoater
Bath pH:
Coating Wts.: mg./sq.ft. (50 mg. is recommended)
Bath Temperature: <40C (104°F)
Strip PMT: C min., 120C max (Above 120°F)
Drying Time: < 10 seconds recommended

8. Passerite 6001 / Passerite 6003 / Bonderite 6020 Trivalent Chromium Passivate Application Parameters
Spray / squeegee (low bath volume) Chemcoater
Contact time:
< 10 seconds
Bath Temp:
< 110°F
Coating Weight:
30 – 40 mg./sq.ft. (20 – 30 mg./sq.ft. for B6020)
Cr Coating Weight:
3.0 – 4.0 mg./sq.ft. (2.0 – 3.0 for B6020)
Bath pH:
< 2.5
Zn Dissolution:
< 1.8% by weight
Bath Concentration:
10 – 60% dependent on flow to line,
20 – 30% is typical
Strip PMT:
110°F → 200°F

9. Recommendations for Designing a System for Hex-Chrome Free Passivates
Solution contact time (time between application / drying ) – as short as possible. Less than 5 seconds excellent.
Chemcoater best method (spray / squeegee is acceptable)
Drying peak metal temp (PMT) - 120°F minimum (220°F max)
Equipment materials (contacts solution) – 316 or 304 stainless steel, or polymer (PVC, PEHD or PP) – no carbon steel
Wringer rolls – Hypalon, Viton or polyurethane covering – 45 – 55 shore hardness
Solution volume – as small as possible – less than 30 gallons – (Henkel “Coiltech” system)
Maintain pH below 2.5 – minimize zinc contamination
X-Ray fluorescence (Portaspec) recommended for coating weights

10. Henkel Standard Accelerated Corrosion Tests for Passivation Treatments
Neutral Salt Spray (NSS)
Wet Stack
Cleveland Condensing (CCH)
Butler Water Immersion (BWI)

11. Corrosion Overview – Field Performance
Customer
Prouduct Used
NSS Results
Wet Stack
BWI
Cleveland Condensing 24 48 72 96 A
P6001 5 10 20
35+
800 hrs.
800 hrs.+
1000 hrs. + B
P6003 15 C
40+ D
B6020 1
30+
700 hrs.+ E
10+ F
20+ G
P5004W
25+
1000 hrs.+ H
P225W 5+
700 hrs.
1000 hrs.
→ Wet Stack, BWI and Cleveland Condensing results are to 5% white rust
Coating Wts. (Chrome mg/sq.ft) A B C D E F
G – 40 – 60 mg./sq.ft. (total)
H – 1.0 – 2.0 mg./ft2 chrome VI

12. Trivalent Based Passivation – Product Evolution Commentary
“Passerite 6001 → Passerite 6003 → Bonderite 6020”
Continuous improvement in all of the following:
Corrosion performance (NSS)
Lower coating weight (lower applied costs)
Improved “paintability”
Improved conductivity (IBM and HP)
Less corrosive to equipment (304 and 316SS)
Bonderite 6020 – removal of organics – no foaming
Products have become more operator and end-user friendly
Next generation product – Bonderite 6010 – “fluoride free” – being tested in Europe

13. Thin Organic Non-Chrome Coating: (Replacement For Hexavalent Cr Containing Acrylics) Granocoat 342
Primarily Used For Galvalume and HDG Coated Steel
Expected Performance: Roll forms without oil
Good fingerprint resistance
Excellent corrosion performance
180° – 220° F PMT

14. Non-Chrome Thin Organic Coating: Granocoat 342
Specifications:

15. Non-Cr Thin Organic Passivate: Application Parameters:
Coating Weight: mg./sq.ft.
PMT: ° - 250° F
Application Method: Chemcoater
Concentration: Used Neat
Application Temperature: Ambient
Recoil Temperature: <160°F

16. Granocoat 342 (Non-Chrome Acrylic)
Summary:
Corrosion performance slightly inferior in NSS (HDG) and wet stack (Galvalume)
Roll-forming excellent and verified at 9-stage roll former (correlates well with Butler Building roll former)
“Paintable” surface
In use at Precoat – Portage and CFM for small applications
Successful trials at Mittal – Sparrows Point (Galvalume) and Nucor – Berkeley (HDG)

17. INORGANIC PASSIVATION HEX-CHROME FREE REFERENCES LIST CUSTOMERS

18. CUSTOMER
PRODUCT
APPLICATION
SUBSTRATE
CONTACT
TKS EBA1
GERMANY
PASSERITE 6003(20% vol)
Spray + Squeegee EG
Dieter Schrocer
VOEST
(4 lines) Austria
PASSERITE 5004
Rollcoater
HDG
Franz Androsch
TKS FBA7
Germany
PASSERITE 6003(40% Vol)
Kurt Motte
TKS FBA4
PASSERITE 6003(30% vol)
Udo Schulokt

19. CUSTOMER
PRODUCT
APPLICATION
SUBSTRATE
CONTACT
ACCIAIERIA CREMONA (IT)
PASSERITE 6001 (40 to 45%vol)
Spray + Squeegee
HDG
Carlo Lanzini
WUPPERMANN
(Holland)
PASSERITE 5004(40 to 45% vol)
Hans G. Klockner
CORUS
Holland
PASSERITE5004(80 to 90% w/w)
Chem Coater
Thijs Post

20. CUSTOMER
PRODUCT
APPLICATION
SUBSTRATE
CONTACT
ARCELOR AVILES
(Spain)
PASSERITE 6001
(40% vol)
Coil tech
HDG
Jose Manuel Puente
WHEELING NISSHIN (US)
PASSERITE 6001 (100%)
Spray + Squeegee + Roll coater
GALVANNEAL
USS POSCO
(US)
BONDERITE 6020 (20%)
Spray + Squeegee
WUPPERMANN
(2 lines)
(Austria)
PASSERITE 5004
Vacuumat
Hans Georg Klockner
MITTAL
SPARROWS PT. MD
Rob Weber

21. CUSTOMER
PRODUCT
APPLICATION
SUBSTRATE
CONTACT
SSAB BORLANGE (SU)
Passerite 6003
(25 to 30% Vol)
COIL TECH
HDG
Mat Eliason
MARCEGALIA
(Italy)
PASSERITE 6001(25to30% w)
Spray + Squeegee
Mr IVALDI
GONVARRI
(Spain)
PASSERITE 6001(55 to 60%vol)
Roll coater + Spray + Squeegee
Jacek Michalek
NLMK
(Russia)
PASSERITE 5004(40 to 45%v)

22. CUSTOMER
PRODUCT
APPLICATION
SUBSTRATE
CONTACT
Mittal Galati
ROMANIA
P. 5004
Roll Coater
HDG
Mr Munteanu
Arcelor(VZA1)
Eisenhuttenstadt
P. 6003
(33 to 36% v/v)
Spray + Squeegee
RUUKI
Finland (1)
COIL TECH
Mr Paavilainen
RUUKI Finland (3)
Chemcoater

23. CUSTOMER
PRODUCT
APPLICATION
SUBSTRATE
CONTACT
JSW - Tarapur
Passerite 6000
Spray + Squeegee
HDG
Rajesh Singh
Ispat India
Passerite 6001
R.S.Jain
Lloyds Steel India
P.K.Chatterjee
Tata Steel
S. Beborta

24. CUSTOMER
PRODUCT
APPLICATION
SUBSTRATE
CONTACT
JINDAL (India)
Passerite 6000
Spray + Squeegee
HDG
Passerite 6001
Bhusan Steel (India)
An Steel (China)
Roll Coater

25. CUSTOMER
PRODUCT
APPLICATION
SUBSTRATE
CONTACT
Benxi (China)
P. 6003
Roll Coater
HDG
Borcelik (Turkey)
Spray + Squeegee

26. Thank you