2. www.ldc-brushplating.com 2 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se Crankshaft for large Diesel engine

3. www.ldc-brushplating.com 3 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se Damages are grinded clean out at the corroded areas on a crankshaft

4. www.ldc-brushplating.com 4 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se Damages are filled with copper LDC- 2904 with a hardness of 250 Hb

5. www.ldc-brushplating.com 5 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se Repair finished with a top layer of LDC-2807 Ni And polished within the tolerance.

6. www.ldc-brushplating.com 6 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se 1mm deep local damage on a crankpin.

7. www.ldc-brushplating.com 7 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se The damage is filled with LDC-2904 copper and polished slight under size approximately 0,03 mm.

8. www.ldc-brushplating.com 8 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se The nickel plating is finished and the crankshaft is ready for final polishing.

9. www.ldc-brushplating.com 9. LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se Score all around a main journal on a crankshaft with a max deapth of up to 1,5 mm

10. www.ldc-brushplating.com 10 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se The score is filled in with Copper LDC-2904 with a hardness of 250 HB

11. www.ldc-brushplating.com 11 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se Nickel LDC- 2807 on top and polished in to right tolerances

12. www.ldc-brushplating.com 12 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se Local damage is about 6 mm deep

13. www.ldc-brushplating.com 13 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se The lokal damage is filled in with LDC-2904 Copper Hi- Speed with a hardness about Hb 250.

14. www.ldc-brushplating.com 14 Crankshaft is totaly repaird and in original tolerances and a top layer of LDC-2807 Nikel acid. LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se

15. www.ldc-brushplating.com 15 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se Damages are ground out Masking off surrounding areas to collect solutions.

16. www.ldc-brushplating.com 16 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se Plated and Polished LDC- 2904 copper with a hardness of 250 HB

17. www.ldc-brushplating.com 17 Finished and polished to tolerances within origin LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se

18. 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 borstplätering Tel: +46 248 17440 ldc@swipnet.se

19. www.ldc-brushplating.com 19 LDC borstplätering Tel: +46 248 17440 ldc@swipnet.se 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