Marine Coating Systems: anti_corrosion
Marine protective and anti-fouling coating system specifications per NORSOK M-501 Ed.7, ISO 12944-5/9:2018, and IMO AFS Convention 2001. Covers anti-fouling types (self-polishing copolymer SPC with copper/booster biocides, tin-free ablative, hard copper, silicone fouling-release, biocide-free hydrogel), anti-corrosion systems by zone (atmospheric, immersed, splash, deck, topside), thermal spray aluminum (TSA), specialty coatings (ballast tank PSPC, cargo tank, subsea FBE riser, ice-class, anti-condensation), and maintenance systems. Attributes include surface preparation grade (ISO 8501-1 Sa 2.5/Sa 3), DFT per coat and total DFT in microns, number of coats, application method, and design service life.
| coating category | coating system | application method | coat 1 dft um (um) | coat 1 type | coat 2 dft um (um) | coat 2 type | coating description | coats (dimensionless) | design life yr | notes | primer type | service zone | surface prep iso8501 | surface prep sspc | total dft um (um) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| anti_corrosion | coal_tar_epoxy_immersed | airless_spray | 200 | coal_tar_epoxy | 200 | coal_tar_epoxy | Coal tar epoxy; legacy immersed protection coating | 2 | 15 | Not permitted on new FPSO/offshore under NORSOK M-501; still used on inland/coastal vessels and older infrastructure; environmental restrictions limit new applications | coal_tar_epoxy | immersed_zone | Sa 2.5 | SP-10 | 400 |
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