Painting in dry dock What paint makers forget to mention and why yards seldom care

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Neal Hensley
5 years ago
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1 Painting in dry dock What paint makers forget to mention and why yards seldom care CET-Hamburg GmbH B. Fleischer

Who is CET Dock broker, Yard network > 60 yards Services for owners which are dock/repair related (Paint / Divers / Engine overhaul / Metaline) Paint Advice and Paint Superintendent service

2 Who is CET Dock broker, Yard network > 60 yards Services for owners which are dock/repair related (Paint / Divers / Engine overhaul / Metaline) Paint Advice and Paint Superintendent service Background: Dry Dock SI, Yard production manager and special paint school Most of paint inspectors are not Paint SI Development Supervisors to Paint SI (budget/option/time) A/F & paint quality more important on fuel consumption No blame game Specific details in direct talks

3 Paint maker situation Yard situation Result for owner

4 Paint maker situation Similar products, very tough competition Very difficult to sell red antifouling Performance difference may not visible (yard/service) Price driven market Earns money by selling paint not giving advice Paint rep. decisions are guided by company s need to earn money Huge knowledge advantage products and competition Most of the time present by paint representative together with yards

Yard situation No consequences, little proof, long time span of work Earn

extras (low skilled labour) No training, learning by doing (basics wrong)

Always present during all works Paint maker cooperation forced yard is

5 Yard situation No consequences, little proof, long time span of work Earn money means - Little effort, little cost, good price Standard work no extras (low skilled labour) No training, learning by doing (basics wrong) Cheap equipment/low maintenance (nozzle diameter) Knowledge advantage Always present during all works Paint maker cooperation forced yard is client of paint maker Long term stay troublemakers kicked out 17 B80 0,017 >> 0,43mm

6 Relation Yard Owner Paint maker Paint maker earn money Yard earn money Owner spend no money Knowledge Paint maker - good Yard - good Owner - limited Owner budget Material high (25% owner budget) Application high (10% owner budget) Final result and consequences high for owner

7 Summary: Yard and Paint maker : Both earn money, both have knowledge, both have close relation Owner : spend money, limited knowledge, one-off to maker/yard Result: Painting is Maker/Yard driven Quality low Value for money low Knowledge imbalance against owner

8 Influence maker/yard - practical points SA1 versus hull washing CDP vs SPC vs Silyl Existing coating vs new DFT checks Thinner vs proper paint Flash rust vs re-blast

9 SA1 vs. hull washing

10 SA1 versus hull washing Loose paint, broken edges, barnicle base pates Std solution Sweep the surface (SA1)

11 Strategy according Business Plan 12/2012 SA1 - cases

12 Strategy according Business Plan 12/2012 SA1 - Results

13 Strategy according Business Plan 12/2012 SA1 - Details

14 Strategy according Business Plan 12/2012 SA1 good results Very few yards capable fine grid, angled sweep, different colurs of paint layers (50 to 150µm) Reality between untouched and bare metal

15 Strategy according Business Plan 12/2012 SA1 - after wash

16 Strategy according SA1 Not Business 100% coated Plan 12/2012 Owners problem!

17 Strategy according Business Plan 12/2012 SA1 full coat required Yards blasting Paint maker paint material Owner best result??? Blast + wash/blow + paint (2x) + material Cheaper?

18 Strategy according Business Plan 12/2012 SA1 Increased roughness Owners problem! SA1 Low friction A/F???

19 SA1 Wash & Scrape Wash cheap; no extra paint; intact system > Owners benefit

20 No corrosion Cheap wash No extra time Little risk > Owner s choice!

21 SA1 versus hull washing Main goal: Preserve intact paint systems!!! Alternative to SA1 70% better choice Wash & scrape or grinding & scrape HP wash 300 to 700 bar close up Spot blast SA1 ~ Full blast SA2

22 If SA1 Overcoat SA 1 for 100% surface Wash after blast whenever possible Accept roughness Consider cost prior start blast/wash/paint/labour Consider yard skill

23 CDP vs SPC vs Silyl Self polishing Antifouling

24 Self-polishing paint is UNDEFINED Principle: Remove coating to reveal new poison Very good performing TBT, bad environmental impact - banned 2003 Follow-up paint now on same level Different thickness of leached layer (remaining paint Grid) Picture by International Paint/Yachtpaint website

25 Leached layer Always there Brittle when dry Breaks of when thick CDP SPC Silyl SPC Pictures by International Paint/Yachtpaint website

CDP controlled depletion polymer Hydrating / Rosin / basic / all-purpose / 10 to 20 USD Thick leached layer > 100µm Brittle, cracks SPC self polishing co-depletion polymer Advertising: Hydrolisys /

26 CDP controlled depletion polymer Hydrating / Rosin / basic / all-purpose / 10 to 20 USD Thick leached layer > 100µm Brittle, cracks SPC self polishing co-depletion polymer Advertising: Hydrolisys / advanced / High performance / 15 to 30 USD Average leached layer µm Silyl SPC like SPC but base is silyl polymer Advertising: Ultra / mega / low friction / 25 to 50++ USD Thin leached layer < 10-50µm Picture by International Paint/Yachtpaint website

27 CDP hybrid SPC based on copper acrylate

28 Strategy according Business Plan 12/2012 Good! Picture by International Paint/Yachtpaint website Average! Picture by International Paint/Yachtpaint website

29 Good! Picture by International Paint/Yachtpaint website Average! Picture by International Paint/Yachtpaint website

30 Good! Picture by International Paint/Yachtpaint website Average! Picture by International Paint/Yachtpaint website

31 Picture by International Paint/Yachtpaint website Picture by International Paint/Yachtpaint website Excessive Thickness in overlap VS/FB Recoating over full A/F layers

32 Washing is MOST important dock job

Combined with water trap Water-poison mix on hull

33 Silyl based Very thin layer, very smooth Increased polishing over time Pay attention to thickness Combined with water trap Water-poison mix on hull Performance indication great Final understanding in 1 to 3 years

Especially for Silyl be careful with cheap offers only two Japanese

34 Summary: Self-polishing paint is UNDEFINED CDP thick LL SPC medium LL Silyl SPC thin LL Price defines quality as base material is expensive Especially for Silyl be careful with cheap offers only two Japanese makers of raw material! Be careful with combined systems SPC /CDP Good!

CDP vs SPC vs Silyl Self polishing Antifouling Use

doubtful Africa CDP doubtful Budget for cleaning

often, soft brushes Prepare dock according paint used

35 CDP vs SPC vs Silyl Self polishing Antifouling Use paint according budget and purpose North sea ice Silyl doubtful Africa CDP doubtful Budget for cleaning between docking CDP often, strong brushes SPC less often, soft brushes Prepare dock according paint used Evaluate performace Adjust paint scheme to vessel By UMC Intl. By UMC Intl.

36 HP washing ist MOST important Owner to get independent knowledge for correct decision

37 Existing coating vs New Coating

38 Check existing system, especially 5Y & 10Y vessels Check remaining DFT of A/F

39 Strategy according Business Plan 12/2012 Docking condition perfect A/F

40 Adjust scheme > check DFT A/F > check condition > Adjust coats & DFT > thick paint cracks Adjust scheme > strong maker resistance > strong yard resistance > only owner is driver

Existing coating vs New applied system Silyl based with very good

based coating (local supply) Adjust thickness & coats Make sure to polish

) New maker > blast / use sealer ruins previous A/F > next dock likely full

41 Existing coating vs New applied system Silyl based with very good performance New paint stuck in costums (West Africa) New maker with CDP based coating (local supply) Adjust thickness & coats Make sure to polish off prior next docking Tie coat not applied (as instructed by paint rep.) New maker > blast / use sealer ruins previous A/F > next dock likely full blast Adjust scheme > strong maker resistance > new maker wants so sell > only owner is driver

42 Existing coating vs New Check existing system, especially 5Y & 10Y vessels & remaining DFT of A/F Keep existing A/F when proper Maker may insist on new coating exception report Maker looses big money, hence pressure is high Too thick paint cracks >> up to total failure possible

43 Paint maker A onto maker B very seldom full blasting required Products similar (not equal!) New maker plays safe blame on old maker Adjust scheme to actual condition Coating number Coating thickness Sequence ( e.g. T/U omission) ONLY OWNER IS DRIVER

44 DFT & Thinner

45 DFT Checks Most important on A/C A/C needs minimum 180µm DRY to do job Equal distribution important

46 A/C needs 180µm DRY to do job Low DFT of A/C very common

47 Proper painting needs proper blasting! Painting always difficult with wild blasting Proper shape of blasting allows proper painting

48 Intact paint destroyed by overblasting

49 Painting follows blasting!

50 Proper shape of blasting allows proper painting & proper checks

(local) unreliable SY relation Check surface condition e.g.

51 Check multiple spots in bad areas Check motivates shipyard to work proper communicate before Check by paint maker (local) unreliable SY relation Check surface condition e.g. grit inclusion Paint single event check always also good yards

52 Summary: Owner drives checks Early info to yard > better quality Good blast > good paint Owner suffers alone No a/c paint guarantee Yard long gone Who is responsible??

handling & easy spray Paint maker sells thinner Paint maker fed

53 Thinner vs Corrosion Paint thickness depending on solid paint particles in liquid Thinning paint for pump operation & easy handling & easy spray Paint maker sells thinner Paint maker fed up to fight (even owner paid paint rep.) Bad pumps Cheap guns Cheap nozzles

54 Thinner result: Low DFT & Rust Paint disappears from dock Thinner entrapment Increased cost Owner to do: Check thinner check DFT always require re-coat on SY expense

55 Re-blast vs Flashrust

56 Problem huge in Asia or warm climate countries Much less in North Europe Paint Maker play dumb

57 Initial Maker A Finish 1st Blast New maker B required full blast Re-blast

58 Shipyard blasting Paint maker tolerate / 100% Qlty Owner pay time & blast/bad quality T/U condition no wash possible 1st Coat Partial 2nd Reblast

59 Washing day 1 06:30 Wash & flashrust system Blasting Day 1 09:30 Docking 22:00

60 Rain HP Wash Day 1 15:45 1st Coat Day 2. 08:30

61 Undocking Day 4 T/U Day 2 14:00 Wash in rain Coat on flash rust

62 Flash rust overcoating Yellow & dry

Summary: Flash rust overcoating is possible with nearly all makers Waterblast approved paint is suitable Unpopular unless hydroblasting country Even then > wash handled different SY do earn money

63 Summary: Flash rust overcoating is possible with nearly all makers Waterblast approved paint is suitable Unpopular unless hydroblasting country Even then > wash handled different SY do earn money with reblast SY do earn money with dock stay Paint maker is 100% safe with reblasting Paint maker does not harm yard 99% no re-blast requrired Do FW HP re-wash 200 bar double effect of clean surface and flash rust removal Safe money! Blast 5 to 10x more expensive Can be done in rain! safe time Only OWNER is the driver!

64 Summary Acknowledge dock interests of maker & yard Compensate the missing knowledge Clarify the required paint Adjust to actual situation

65 Summary Check, check & check (e.g. DFT/Thinner) Use alternative methods Avoid SA1 Use HP-Wash Use Flashrust

66 CET-Hamburg offers Paint Advice Paint Superintendents Thank you for your attention!

A-LF-Sea. Application Manual for M&R. (Full blasting)

A-LF-Sea. Application Manual for M&R. (Full blasting) Application Manual for M&R (Full blasting) April 2015 1 Contents 1.Standard scheme 1)Standard scheme for flat & vertical bottom 2)Colour scheme for system 2.High pressure fresh water washing (HPFWW) 1)Timing