2 ldc borstplätering tel: +46 248 17440 [email protected] crankshaft for large diesel engine

www.ldc-brushplating.com 2

LDC borstpläteringTel: +46 248 17440 [email protected]

Crankshaft for large Diesel engine



Damages are grinded clean out at the corroded areas on acrankshaft



Damages are filled with copper LDC-2904 with a hardness of 250 Hb



Repair finished with a top layer of LDC-2807 NiAnd polished within the tolerance.



1mm deep local damage on a crankpin .



The damage is filled with LDC-2904 copper and polished slight under size approximately 0,03 mm.



The nickel plating is finished and the crankshaft is ready for final polishing.


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Score all around a main journal on a crankshaft with a max deapth of up to 1,5 mm



The score is filled in with Copper LDC-2904 with a hardness of 250 HB



Nickel LDC-2807 on top and polished in to right tolerances


LDC borstplätering Tel: +46 248 17440 [email protected]

Local damage is about 6 mm deep



The lokal damage is filled in with LDC-2904 Copper Hi-Speed with a hardness about Hb 250 .


Crankshaft is totaly repaird and in original tolerances and a top layer of LDC-2807 Nikel acid.



LDC borstplätering Tel: +46 248 17440 [email protected]

Damages are ground out Masking off surrounding areas to collect solutions .



Plated and Polished LDC-2904 copper with a hardness of 250 HB


Finished and polished to tolerances within origin



Then plating and polishing is finished there is several testing's, fore example blue test to check contact area.




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

2 ldc borstplätering tel: +46 248 17440 [email protected] crankshaft for large diesel engine

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