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www.ldc-brushplating.com 2
LDC borstpläteringTel: +46 248 17440 [email protected]
Crankshaft for large Diesel engine
www.ldc-brushplating.com 3
LDC borstpläteringTel: +46 248 17440 [email protected]
Damages are grinded clean out at the corroded areas on acrankshaft
www.ldc-brushplating.com 4
LDC borstpläteringTel: +46 248 17440 [email protected]
Damages are filled with copper LDC-2904 with a hardness of 250 Hb
www.ldc-brushplating.com 5
LDC borstpläteringTel: +46 248 17440 [email protected]
Repair finished with a top layer of LDC-2807 NiAnd polished within the tolerance.
www.ldc-brushplating.com 6
LDC borstpläteringTel: +46 248 17440 [email protected]
1mm deep local damage on a crankpin .
www.ldc-brushplating.com 7
LDC borstpläteringTel: +46 248 17440 [email protected]
The damage is filled with LDC-2904 copper and polished slight under size approximately 0,03 mm.
www.ldc-brushplating.com 8
LDC borstpläteringTel: +46 248 17440 [email protected]
The nickel plating is finished and the crankshaft is ready for final polishing.
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LDC borstpläteringTel: +46 248 17440 [email protected]
Score all around a main journal on a crankshaft with a max deapth of up to 1,5 mm
www.ldc-brushplating.com 10
LDC borstpläteringTel: +46 248 17440 [email protected]
The score is filled in with Copper LDC-2904 with a hardness of 250 HB
www.ldc-brushplating.com 11
LDC borstpläteringTel: +46 248 17440 [email protected]
Nickel LDC-2807 on top and polished in to right tolerances
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LDC borstplätering Tel: +46 248 17440 [email protected]
Local damage is about 6 mm deep
www.ldc-brushplating.com 13
LDC borstpläteringTel: +46 248 17440 [email protected]
The lokal damage is filled in with LDC-2904 Copper Hi-Speed with a hardness about Hb 250 .
www.ldc-brushplating.com 14
Crankshaft is totaly repaird and in original tolerances and a top layer of LDC-2807 Nikel acid.
LDC borstpläteringTel: +46 248 17440 [email protected]
www.ldc-brushplating.com 15
LDC borstplätering Tel: +46 248 17440 [email protected]
Damages are ground out Masking off surrounding areas to collect solutions .
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LDC borstpläteringTel: +46 248 17440 [email protected]
Plated and Polished LDC-2904 copper with a hardness of 250 HB
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Finished and polished to tolerances within origin
LDC borstpläteringTel: +46 248 17440 [email protected]
www.ldc-brushplating.com 18
Then plating and polishing is finished there is several testing's, fore example blue test to check contact area.
LDC borstpläteringTel: +46 248 17440 [email protected]
www.ldc-brushplating.com 19
LDC borstpläteringTel: +46 248 17440 [email protected]
Process Procedure for repair of Crankshaft damage using LDC plating method.1. Dressing up the area of dent/damage with local grinding machine.2. Degreasing by acetone or similar on damaged and surrounding areas.3. Masking of crankpin and sheeting of surrounding areas to prevent ingress of plating solutions or any
contaminants.4. Electrically degreasing by LDC-01 Electroclean + polarity 8-10 V.5. Rinse with clean water.6. Activate with LDC-02 activator and etch - polarity 10 V.7. Rinse with clean water.8. Activate with LDC-03 activator and etch - polarity 14 V.9. Rinse.10. Activate with LDC-1 Activator 1 + polarity 9 V.11. Apply a bonding layer of 3-4 microns LDC-2801 + pol. 10 – 14 V.12. Rinse.13. Build-up plating with LDC-2904 Copper Alk. HS + polarity 5 – 8 V.
to oversize then grind/dress/polish down to just below nominal dimensions, leaving 0,005-0,02mm undersize.14. This procedure might have to be done several times if damage is very deep.15. Top coat with Nickel LDC-2807 to reach correct tolerance.
LDC Sales & Consulting AB Box 82 79522 RÄTTVIK SWEDEN