DET NORSKE VERITAS. Report Crossover test of Jotacote Universal N10 on Galvany IZ 182 (J) Jotun A/S

Transcription

1 Report Crossover test of Jotacote Universal N10 on Galvany IZ 182 (J) Jotun A/S Report No./DNV Reg No.: / 12KETUL-13 Rev 00,

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3 Table of Contents 1 INTRODUCTION SCOPE OF WORK WORK CARRIED OUT PRIOR TO EXPOSURE Identification Surface preparation Application Application procedure Test panel Dry film thickness Pinhole detection EXPOSURE TESTS CARRIED OUT AFTER EXPOSURE RESULTS Product identification Results from examinations Adhesion tests Evaluation of test results CONCLUSION REFERENCES... 8 Appendix A Photo documentation Appendix B Weathering data Appendix C Infrared spectra Date : Page ii of ii

4 1 INTRODUCTION The coating system, Jotacote Universal N10 applied on a Galvany IZ 182 (J) zinc shop primed steel panel, has been tested in accordance with the IMO Performance Standard for Protective Coatings /1/, section 1.7 of appendix 1 to annex 1, without wave movement (cross over test). 2 SCOPE OF WORK The following work and tests have been performed by Jotun AS at Jotun AS test laboratory in Sandefjord, Norway, partly under the supervision of a representative from DNV: Application processes as documented in Table 3 Two months outdoor weathering of the shop primed test panel. The following work and tests have been performed by DNV at the DNV laboratory in Bergen, Norway: Identification of the coating system by means of determination of density and infrared (IR) spectra Total dry film thickness measurements and pinhole detection on the test panel before testing 180 days exposure in an exposure tank without wave movement Evaluation of testing performed after exposure, including visual check for rust and blisters, cathodic protection and adhesion measurements. 3 WORK CARRIED OUT PRIOR TO EXPOSURE 3.1 Identification The coating system was identified by infrared scanning (by means of a Nicole Protégé 460 FTIR Spectrometer) and by determination of density (according to ISO /2/ by means of an Erichsen Mod. 290/1 Pycnometer). The results from the identification are given in Table 5 and Appendix C. Date : Page 1 of 8

5 3.2 Surface preparation Surface preparation was carried out according to the data given in Table 1. Table 1 Surface preparation data* Surface preparation method Blasting standard Abrasive used Blast cleaning Sa 2 ½ AlSil A3 Roughness [µm] Rmax : Water soluble salts Average measured 16 mg/m 2. Standard used: ISO 8502 The Bresle Method) Dust and abrasive inclusions No dust or abrasive inclusions was detected by visual examination * Surface preparation performed by Jotun AS. Data in Table 1 is provided by Jotun AS. 3.3 Application Application procedure Galvany IZ 182 (J) shop primer was applied on a test panel blast cleaned with AlSil A3. The shop primed test panel was weathered outdoors for two months. Weathering details are presented in Table 2 and Appendix B. Table 2 Secondary surface preparation and weathering details * Weathering site (outdoor) Jotun s production site in Sandefjord, Norway Start of weathering Stop of weathering Preparation of test panel Low pressure washing after weathering * Data in Table 2 is provided by Jotun AS. Two coats of Jotacote Universal N10 were applied on the shop primed and weathered test panel. Application data are given in Table 3. Date : Page 2 of 8

6 Table 3 Application data Paint system Manufacturer Application data Shop primer 1 st coat 2 nd coat Galvany IZ 182 (J) KCC Marine & Protective Coatings Jotacote Universal N10 (Al red toned) Jotun AS Jotacote Universal N10 (Al/Grey) Date Time 09:30 09:55 09:50 Batch No. Paste: KC Base: Base: Liquid: KC Hardener: Hardener: Thinner name (if used) n/a Jotun Thinner No.17 Jotun Thinner No.17 Batch No. thinner (if used) n/a n/a n/a Equipment used (pressure ratio) Wiwa (60:1) Wiwa (60:1) Wiwa (60:1) Air pressure at nozzle [bar] Size nozzle [inches] Fan width [º] Paste : Liquid = Base : Hardener = Base : Hardener= Mix. ratio 1 : 1 (by weight) 100 : 22 (by weight) 100 : 22 (by weight) Volume solid [%] Wet film thickness [µm] Dry film thickness [µm] See Table 4 Thinner [vol. %] Air temperature [ºC] Humidity [% RH] Steel temperature [ºC] Dew point [ºC] Present at shop primer application: Reidar J. Pettersen, Terje Aamodt and Cecilie Clasen Jotun AS. Vidar Kvamme Det Norske Veritas. Present at coating application: Reidar J. Pettersen, Odd Arntzen and Cecilie Clasen Jotun AS. Vidar Kvamme Det Norske Veritas. Water soluble salts measured on the shop primer [mg/m 2 ] : 14, 20, 32 Date : Page 3 of 8

7 3.3.2 Test panel The panel was coded as shown in Figure 1. EP JCO44 Anode Holiday Figure 1 Test panel 3.4 Dry film thickness The dry film thickness (DFT) measurements were carried out by using a calibrated PosiTector A template, as shown in Figure 2, was used for the measurements. The results from the measurements are given in Table Figure 2 DFT measurement locations Date : Page 4 of 8

8 Table 4 Results from the DFT measurements, values given in µm (20 µm subtracted for shop primer) Measuring point Total Max 500 Min 388 Average 437 StDev Pinhole detection Pinhole detection was performed on the coated test panel before exposure. The detection was carried out by means of an Elcometer 269 Pinhole detector at 90 volts. The result from the pinhole detection is shown in Table 8. 4 EXPOSURE The exposure was carried out according to the IMO Performance Standard for Protective Coatings /1/. The exposure was started and terminated TESTS CARRIED OUT AFTER EXPOSURE Visual inspection for rust and blisters, adhesion measurements and evaluation of cathodic disbondment were carried out according to specifications and standards referred to in the IMO Performance Standard for Protective Coatings /1/. The results are shown in Table 6 and 7. Date : Page 5 of 8

9 6 RESULTS 6.1 Product identification The results from the product identification are given in Table 5. Table 5 Results of analyses (Product identification) Product Batch no. IR identification Density [g/cm 3 ] GALVANY IZ 182 (J) (Paste) KC See Appendix C 1.53 GALVANY IZ 182 (J) (Liquid) KC See Appendix C 0.87 Jotacote Universal N10 Al red toned (Base) Jotacote Universal N10 Al red toned (Hardener) Jotacote Universal N10 Al/Grey (Base) Jotacote Universal N10 Al/Grey (Hardener) See Appendix C See Appendix C See Appendix C See Appendix C Results from examinations The results from the examination of the coated test panel are schematically given in Table 6 and Table 7. Pictures of the panel after exposure are enclosed in Appendix A. Date : Page 6 of 8

10 Table 6 Results of testing Cathodic disbondment Blisters / rust Zinc anode [mm] 1) weight loss [g] Current demand [ma/m 2 ] 2) ) Assess loss of adhesion at the artificial holiday by using a sharp knife to make two cuts through the coating to the substrates, intersection at the holiday. With the point of the knife, attempt to lift and peel back the coating from around the holiday. Record whether the adhesion of the coating to the substrate has been reduced and the approximate distance, in millimetres, that the coating can be peeled. (From ISO 15711:2003 /3/) Additionally IACS interpretation of IMO PSPC: Repeat the cutting and lifting all around the artificial holiday to find the maximum loss of adhesion. Disbonding from artificial holiday can be either loss of adhesion to the steel substrate or between the shop primer and the epoxy coating and shall be less than 8 mm for epoxy based systems to be acceptable (compatibility test). Cohesive adhesion failure in the shop primer is not to be included as part of the loss of adhesion. (From IACS Model Report for IMO Resolution MSC.215(82) Annex 1 Test Procedures for Coating Qualification, Section Crossover Test, No102 (June 2008) /4/) 2) Exposure time: 120 days (Total time 180 days. Each cycle consists of 2 weeks seawater immersion and 1 week exposure in relative high humidity air) Utilisation factor: 0.8 Consumption rate for Zn-anodes: 11.3 kg/a year Adhesion tests Adhesion tests were carried out on the test panel by using a DeFelsko PosiTest AT adhesion tester. Dollies with 20 mm diameter were used. The coating surface and dollies were grinded carefully with FEPA P#320 SiC paper and rinsed with technical alcohol. The dollies were attached to the coating using 3M DP410 epoxy based glue. The curing of the glue was carried out according to manufacturer s recommendations. A hole saw was used to cut carefully through the coating down to bare steel before pulling of the dollies. Values from the test are presented in Table 7. Table 7 Results of the Pull-off adhesion Test Test no. Adhesion strength [MPa] Fracture [%] C, 75D C, 85D C, 88D C, 88D, 6-/Y C, 88D C, 90D Average 8.9 Total adhesive: 1, Total cohesive: 99 A/B: Fracture between the steel surface and the shop primer B: Fracture in the shop primer B/C: Fracture between the shop primer and the first coat C: Fracture in the first coat C/D: Fracture between the first and second coat D: Fracture in the second coat -/Y: Fracture between the second coat and the glue Y/Z Fracture between the glue and the dolly Date : Page 7 of 8

11 6.3 Evaluation of test results Evaluation of the test results are given in Table 8. Table 8 Results from evaluation of the coated test samples Test parameter Acceptance criteria for epoxy based systems on shop primed and 2 months weathered substrate Test results Passed / failed Pinholes No pinholes 0 Passed Blisters and rust No blisters or rust 0 Passed Adhesion values average [MPa] 1) >3.5 adhesive failure 3.0 cohesive failure 8.9 Passed Cathodic disbondment [mm] 2) < Passed Current demand [ma/m 2 ] 2) < Passed 1) 2) See Table 7 for details See Table 6 for details 7 CONCLUSION The results from the testing show that Jotacote Universal N10, product from Jotun A/S, applied on Galvany IZ 182 (J) shop primer, product from KCC Marine & Protective Coatings, passed all the test requirements given in the IMO Performance Standard for Protective Coatings /1/. 8 REFERENCES /1/ MSC 215 (82): 2006 Performance Standard for Protective Coatings for dedicated sea water ballast tanks in all types of ships and double-side skin spaces of bulk carriers /2/ ISO : 1997 Determination of density Part 1: Pycnometer method /3/ ISO 15711: 2003 Paints and varnishes Determination of resistance to cathodic disbonding of coatings exposed to sea water /4/ IACS Model Report for IMO Resolution MSC.215(82) Annex 1 Test Procedures for Coating Qualification, Section Crossover Test, No102 (June 2008) - o0o - Date : Page 8 of 8

12 APPENDIX A PHOTO DOCUMENTATION Date : Page A1 of A3

13 Figure A1 The cathodic disbondment after exposure Crossover panel JCO44 after exposure Figure A2 Adhesion test no. 1 and 2 (left to right) on the crossover panel JCO44 after exposure Date : Page A2 of A3

14 Figure A3 Adhesion test no. 3 and 4 (left to right) on the crossover panel JCO44 after exposure Figure A4 Adhesion test no. 5 and 6 (left to right) on the crossover panel JCO44 after exposure - o0o - Date : Page A3 of A3

15 APPENDIX B WEATHERING DATA Date : Page B1 of B2

16 Figure B1 The weathering conditions during the exposure, December 2009 Figure B2 The weathering conditions during the exposure, January 2010 All data in Figures B1 and B2 is provided by Meteorologisk institutt. The weather station Sandefjord that is collecting the data of rainfall, does not record temperature. The weather station Melsom collecting the temperature data is located approximately 13 km from Sandefjord. - o0o - Date : Page B2 of B2

17 APPENDIX C INFRARED SPECTRA Date : Page C1 of C4

18 0,284 0,28 0,27 0,26 0,25 0,24 0,23 0,22 0,21 0,20 0,19 0,18 0,17 0,16 0,15 ARBITRARY 0,14 0,13 0,12 0,11 0,10 0,09 0,08 0,07 0,06 0,05 0,04 0,03 0,02 0,01-0, , ,9 1/cm Figure C1 Infrared spectra of GALVANY IZ 182 (J), binder component of paste (batch no.: KC ) 0,404 0,38 0,36 0,34 0,32 0,30 0,28 0,26 0,24 0,22 ARBITRARY 0,20 0,18 0,16 0,14 0,12 0,10 0,08 0,06 0,04 0,02 0, , ,9 1/cm Figure C2 Infrared spectra of GALVANY IZ 182 (J), liquid (batch no.: KC ) Date : Page C2 of C4

19 ARBITRARY 0,356 0,35 0,34 0,33 0,32 0,31 0,30 0,29 0,28 0,27 0,26 0,25 0,24 0,23 0,22 0,21 0,20 0,19 0,18 0,17 0,16 0,15 0,14 0,13 0,12 0,11 0,10 0,09 0,08 0,07 0,06 0,05 0,04 0,03 0,02 0,01 0, , ,9 1/cm Figure C3 Infrared spectra of Jotacote Universal N10 (Al red toned), binder component of base (batch no.: ) 0,1812 ARBITRARY 0,175 0,170 0,165 0,160 0,155 0,150 0,145 0,140 0,135 0,130 0,125 0,120 0,115 0,110 0,105 0,100 0,095 0,090 0,085 0,080 0,075 0,070 0,065 0,060 0,055 0,050 0,045 0,040 0,035 0,030 0,025 0,020 0,015 0,010 0,005-0, , ,9 1/cm Figure C4 Infrared spectra of Jotacote Universal N10 (Al red toned), hardener of the first coat (batch no.: ) Date : Page C3 of C4

20 ARBITRARY 0,339 0,33 0,32 0,31 0,30 0,29 0,28 0,27 0,26 0,25 0,24 0,23 0,22 0,21 0,20 0,19 0,18 0,17 0,16 0,15 0,14 0,13 0,12 0,11 0,10 0,09 0,08 0,07 0,06 0,05 0,04 0,03 0,02 0,01 0, , ,9 1/cm Figure C5 Infrared spectra of Jotacote Universal N10 (Al/Grey), binder component of base to second coat (batch no.: ) ARBITRARY 0,1828 0,180 0,175 0,170 0,165 0,160 0,155 0,150 0,145 0,140 0,135 0,130 0,125 0,120 0,115 0,110 0,105 0,100 0,095 0,090 0,085 0,080 0,075 0,070 0,065 0,060 0,055 0,050 0,045 0,040 0,035 0,030 0,025 0,020 0,015 0,010 0,005-0, , ,9 1/cm Figure C6 Infrared spectra of Jotacote Universal N10 (Al/Grey), hardener component of the second coat (batch no.: ) - o0o - Date : Page C4 of C4

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