Qualification Report

Transcription

1 Certified according to ISO 9001:2008 Cert. No AQ-NOR-NA Qualification Report Testing of Jotun Coating system according to NORSOK M-501, Rev. 5 System 7 Jotun Coating system Marathon 2 x 250 µm Customer: Jotun Coatings 3248 Sandefjord Odd Arntzen Norner project number: int Report number: SL

2 Contends Page no 1. Introduction 3 2. General Data 3 3. Paint Application 3 4. Testing Cathodic Disbonding Seawater Immersion Adhesion Testing Over coating 4 5 Requirements Seawater Immersion Cathodic Disbonding 4 6 Test Results Cathodic Disbonding Seawater Immersion 5 7 Conclusion 5 Appendix 1 Total Dry Film Thickness measurement 6 Appendix 2 Total Figures Seawater Immersion 7 Appendix 3 Paint Application form 8 Appendix 4 Image of exposed plates 9 Asdalstrand

3 1. Introduction Jotun Coatings wanted Norner to perform pre-qualification test on one coating system according Norsok M-501, rev. 5 System 7, Submerged application 2. General data Coating system Batch no Comp A / Comp B 2 x Marathon à 250 µm EE / F Total thickness 500 µm Qualification tests according Coating system 7 will include: Pull-off adhesion ISO 4624 Seawater Immersion ISO Chatodic Disbonding ISO Over paint ISO Substrate: Steel plates, pre- treated according ISO Dimension: 150 x 75 x 5 mm 3. Paint Application The coating was applied by Jotun Coatings under witness of Norner Innovation. Dry Film Thickness was measured on each panel according ISO Testing 4.1 Cathodic Disbonding CD test has been performed according ISO 15711, method A with impressed current. The test solution was artificial sea water in accordance with requirements given in ISO An artificial holyday with diameter 6 mm was mechanically applied each sample. 3 parallels from each system were tested. The samples were evaluated after exposure due to degree of disbonding from artificial holyday in accordance with ISO and Blistering according ISO Seawater Immersion Scribe line, 2 x 50 mm, was made mechanically on each sample. The samples were immersed at 40 C in artificial seawater in accordance with requirements given in ISO Exposure time 4200 hours. 3 parallels from each system were tested. The samples were evaluated after exposure with respect to: Pull-off ISO 4624 Asdalstrand

4 Blistering ISO Rusting ISO Cracking ISO Flaking ISO Chalking ISO Corrosion from scribe line according ISO Adhesion Testing The adhesion has been tested before and after cyclic ageing and seawater immersion. The test was performed according ISO Three pull-of tests have been performed on each sample. The average value has been reported. 4.5 Over coating 60 µm Marathon 5. Requirements 5.1 Seawater Immersion Following requirements shall be complied after exposure: Pull-off ISO 4624 min. 5 MPa, max 50% reduction from unexposed sample Blistering ISO Rusting ISO Ri 0 Cracking ISO Flaking ISO Chalking ISO Corrosion creeps < 8 mm Overcoat ability min. 5 MPa adhesion 5.2 Cathodic Disbonding Equivalent diameter of disbonded area shall not be more than 20 mm. No sign of blistering. 6. Test results 6.2 Cathodic Disbonding Table 1 Maximum disbonding Disbonded area mm Equivalent diameter mm Panel Panel Panel No sign of blistering or visible failure of the surface. Asdalstrand

5 6.3 Seawater Immersion Table 2 2 x Marathon à 250 µm Assessment before exposure Panel no. 4 Panel no. 12 Panel no. 15 Average Pull of (MPa) (ISO 4624) 14,8 12,2 14,1 10,5 Assessment after exposure Panel no. 9 Panel no. 10 Panel no. 13 Average Pass / Fail Pull of (MPa) (ISO 4624) 12,3 8,1 9,8 10,1 Pass Blistering (ISO ) Pass Rusting (ISO ) Ri 0 Ri 0 Ri 0 Ri 0 Pass Cracking (4628-4) Pass Flaking (ISO ) Pass Chalking (ISO ) Pass Corrosion from scribe 0,0 0,0 0,0 0,0 Pass Comment Overcoat ability: 13,8 MPa 7 Conclusions Jotun Coating system Marathon 2 x 250 µm fulfill all requirements given in Norsok M-501 rev. 5, system 7 Date: Roger Didrichsen Senior Engineer Henning Baann Laboratory manager Asdalstrand

6 Appendix 1 Total Dry Film Thickness measurement DFT Total adjusted for roughness Panel Mean StDev Max Min Total , , , , , , , , , Asdalstrand

7 Appendix 2 Total Figures Seawater Immersion 2 x Marathon à 250 µm Panel no. 4 Panel no 12 Panel no. 15 Average St.dev. Pull-of test before exposure (Mpa) 13,7 15,6 15,6 13,2 6,5 15,4 14,6 14,3 14,1 14,0 13,7 2,8 Panel no Average St.dev. 9 Pull-of test after exposure (Mpa) 12,3 11,3 13,4 12,4 12,3 1,1 Pull-off reduction % -10-9,8 Rusting Ri 0 Blistering Cracking Flaking Chalking 0 Average M Corrosion from scribe M 0, ,0 0,0 10 Pull-of test after exposure (Mpa) 8,1 7,7 8,5 8,1 0,6 Pull-off reduction % ,7 Rusting Ri 0 Blistering Cracking Flaking Chalking 0 Average M Corrosion from scribe M 0, ,0 0,0 13 Pull-of test after exposure (Mpa) 9,8 10,3 9,6 9,6 9,8 0,4 Pull-off reduction % ,4 Rusting Ri 0 Blistering Cracking Flaking Chalking 0 Average M Corrosion from scribe M 0, ,0 0,0 Corrosion creep M are calculated from the equation M=(C-W)/2, where C is the average with measurements in mm and W is the original width of the scribe. Asdalstrand

8 Appendix 2 Pain Application Form Paint Application Form Rapport nr.: PAF Application data: 1 st coat 2 nd coat 3 rd coat 4 th coat Paint system: Marathon, Red Marathon, Red Manufacturer: Date Time Surface prep. Gritblasting - Blasting standard SA2½ - Abrasive used A3 - Roughness Med. - Batch No. Comp. A EE EE Batch No. Comp. B F F Equipment used Wiwa 60 : 1 Wiwa 60 : 1 Air pressure Size nozzle Fan width Mix.ratio by volume 3:1(100:24,5) 3:1(100:24,5) Volume solid 80% 80% Wet film thickness 312,5µm 312,5µm Dry film thickness 250µm 250µm % Thinner 10% No 17 10% No 17 Air temperature 19 ºC 18 ºC % RH. 54 % 63 % Steel temp. 19 ºC 18 ºC Dew point 9 ºC 11 ºC Comments: Present at application: RJP, OAA, TAa(Jotun) Roger Didrichsen, Håkon Sandberg (Norner) Asdalstrand

9 Appendix 3 Image of CD exposed plates after assessment Image of Seawater Immersed plates after assessment Asdalstrand