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Organically Stabilised Electroless Nickel

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Presentation on theme: "Organically Stabilised Electroless Nickel"— Presentation transcript:

1 Organically Stabilised Electroless Nickel
NiKlad ELV 835 Organically Stabilised Electroless Nickel

2 Why an Organically Stabilized EN
RoHS/WEEE/ELV legislation Limits metal stabilizers Competitors reverted to early stabilizers system Technical issues with early systems More stringent controls being introduced NSF/51 JPSSFI Pressure from large OEM’s and Countries Volvo Black list China ELV

3 Issues with Existing Processes
Earlier Stabilizers Already replaced by Lead and Cadmium for process improvements Re-used as Cadmium and Lead removed Issues with early formulations Product stability Semi matrix systems difficult to produce Activation of some substrates is very poor, e.g. copper alloys

4 Organic Stabilisers They do not presently fall into any “prospective” environmental legislation Originally developed 20 years ago Elnic 100 organically stabilised First generation had technical limitations Work started on next generation 3 years ago Initially, only available as semi bright Were more difficult to control

5 Newer Processes Development over past 2 years
Family of 4 processes now developed and in use: Mid Phos 6 – 9% NiKlad ELV 838 Low Mid Phos 4 – 6% NiKlad ELV 835 Low Phos 1 – 3 % NiKlad ELV 824 EN Strike NiKlad ELV 831

6 NiKlad ELV 835 Equipment & Operation Experience Substrates
Polypropylene tanks - OK Stainless Steel tanks - OK 6 g/L Nickel use - OK LMO™ - OK Substrates Steel - OK Copper - OK Brass - OK Aluminum (cast/wrought) - OK Thicknesses from 0.1 to 11 mils In use at 8 applicators Mid Phos.

7 Why Use These Baths RoHS compliant, and as long as the use of nickel is still acceptable…. No shelf life issues for product stability Can be used as LMO* Easy to use and tolerant to abuse * Low Metal Operation

8 Deposit Composition Deposit contains only nickel, phosphorus, carbon and sulphur Carbon and sulphur contents are similar to conventional low medium phosphorus

9 Deposit Composition NiKlad 767 ppm NiKlad ELV 835 MTO’s Carbon Sulphur
< 200 173 < 400 < 50 6 414 561

10 NiKlad ELV 835 - Experiences
Stability Used in Anodically Protected Stainless Steel Polypropylene No issues, in fact opinion was in favour of superior stability over conventional systems and at least as good as the ELV systems

11 NiKlad ELV 835- Speed

12 NLV Speed Many customers can achieve over 1 mil/Hr (25ums/Hr), even when the bath is old It can be difficult to load the bath when plating this fast Customers are using 10 – 15 oF (6 – 9oC)lower temperature at nominally the same speed Saving energy over older chemistry

13 NiKlad ELV Speed

14 NiKlad ELV Gloss

15 NiKlad ELV Gloss Brightness is slightly reduced when compared to conventional systems This is very true for a new bath Brightness is comparable to other ELV processes Brightness very consistent over the bath life Some customers like this consistency

16 NiKlad ELV Stress

17 NiKlad ELV Hardness

18 NiKlad ELV Hardness The hardness and wear resistance is superior to medium phosphorus baths It is similar to conventional baths with similar phosphorus contents

19 NiKlad ELV Wear

20 NiKlad ELV Wear

21 NiKlad ELV 835 - Corrosion Resistance
The process performs to the same standard as 5 – 7% phosphorus baths at customers Electrochemical testing shows similar results with medium and low medium phosphorus baths NSS testing gave > 120 hours with a new solution and 1 mil plating

22 NiKlad ELV 835 - Corrosion Resistance
96 Hours

23 NiKlad ELV 835 - Corrosion Resistance
144 Hours

24 NiKlad ELV 835 - Operational Experience
Effect of large additions Operation as an LMO Bath Loading Use of lower temperatures Activation of Substrates

25 NiKlad ELV 835 - Operational Experience
Effect of large additions Bath is less sensitive to large additions than conventional chemistry Largest addition made was >60% in a single addition Bath continued to plate with little or no negative effects

26 NiKlad ELV 835 - Operational Experience
Operation as an LMO Ideal, due to low sensitivity to additions Operation as a LMO does not require controllers Bath Loading Bath functions in a wide range of bath loadings, from 0.01 to 1.5 ft2/gal (0.03 – 4.0 dm2/L)

27 NiKlad ELV 835 - Operational Experience
Use of lower temperatures As stated earlier, due to the high speed it is possible to reduce the temperature and still obtain good rates Activation of Substrates Unlike some of the ELV compliant chemistries, activation is very fast

28 NiKlad ELV 835 - Operational Experience
Bath Life The bath consumes hypophosphite at the same rate as a normal low medium phosphorus bath. Can be used to > 8 MTO’s Due to low stress and high speed useful life is greater than the older conventional systems Life on aluminum is at least as good as the older conventional systems 6 MTO’s on 7075 alloy with no strike

29 NiKlad ELV 835 - Operational Experience
Pretreatment Good pretreatment is critical for these processes Can drag in organics reducing the effectiveness of the stabilisers It does not smooth over smut as effectively as a cadmium brightened bath You cannot easily activate copper and brass using palladium

30 NiKlad ELV Summary The use of non metallic stabilisers as a viable alternative to the traditional metallic systems is now production proven These baths have few disadvantages and many advantages including: Speed Energy Efficiency Product Stability Future Proofing

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