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Passivity Fe3OOH is stable and coats the iron surface, protecting it from corrosion Corrosion Water oxidation line Anodic Protection Inhibitor Cathodic Protection Immunity Elemental iron(fe) is stable and will not corrode in this resign - 10 -

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Uniform Hydrogen damage Blister Surface cracks Internal voids Galvanic Intergranular Active Noble Crevice Dealloying Layer Plug Pitting Erosion Cavitation Fretting Environmentally induced cracking Stress-corrosion Corrosion fatigue Hydrogen-induced cracking - 12 -

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E 전위 OCP Log i 전류밀도 (b) 주기적 분극시험법 E 전위 (1) 양분극 OCP (2) 음분극 Log i 전류밀도 (a) 양분극과음분극시험법 - 19 -

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Prefabrication Shopprimer painting o Outfitting painting Painting stage Before erection Block Stage painting Pre-erection joint painting After erection Dock stage painting Quay stage painting - 21 -

Stage Flow chart Steel stock Primary surface preparation Shoppriming Block stage Outfitting painting Block assembly Application specified coats Secondary surface Painting before launching Dock and Quay stage Application of top coat Delivery - 22 -

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ε - 27 -

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μ μ μ - 36 -

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η ζ δ Γ η ζ δ Γ α Γ δ ζ η Γ δ - 39 -

ζ η η η η - 40 -

ζ δ Γ ζ ζ ζ Γ Γ α ζ ζ ζ ζ δ δ Γ δ δ δ δ δ δ δ δ δ Γ - 41 -

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method of corrosion resistance test electrochemical NO specimen SST(salt test 1 Iron 2 PE :PolyEthylene 3 4 5 6 PA : PolyAmide Pure epoxy Hot-dip aluminizing Hot-dip galvanizing Fig. 3.9 Test specimens for - 54 - corrosion resistance spray test)

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% 12 11 10 9 8 7 6 5 4 3 2 1 Generral cargo Oil tanker Bulk carrier Timber carrier Ore carrier LPG Container PCC Other 0 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5-56 -

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Ship type Oil tanker Ore carrier Bulk carrier Corrosion & Wear rate (mm/y) 0 0.5 1.0 0.63 0.76 0.84 General cargo Timber carrier Total 0.48 0.90 0.61 Ship type Oil tanker Ore carrier Bulk carrier Corrosion & Wear rate (mm/y) 0 0.5 1.0 0.22 0.27 0.27 General cargo Timber carrier Total 0.20 0.37 0.25-59 -

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2.0 Pure Epoxy Polarization Potential (V/SSCE) 1.5 1.0 0.5 0.0-0.5-1.0-1.5 1x10-10 Current Density (μ A/cm 2 ) - 69 -

2.0 Polarization Potential (V/SSCE) 1.5 1.0 0.5 0.0-0.5-1.0-1.5 10-9 10-8 10-7 10-6 1x10-5 1x10-4 10-3 10-2 10-1 10 0 Current Density (μ A/cm 2 ) 2.0 Zn-G Polarization Potential (V/SSCE) 1.5 1.0 0.5 0.0-0.5-1.0-1.5 10-8 10-7 10-6 1x10-5 1x10-4 10-3 10-2 10-1 10 0 Current Density (μ A/cm 2 ) - 70 -

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Iron P.E. P.A. Pure epoxy Al-G Zn-G - 84 -

Iron P.E. P.A. Pure epoxy Al-G Zn-G - 85 -

Iron P.E. P.A. Pure epoxy Al-G Zn-G - 86 -

Iron P.E. P.A. Pure epoxy Al-G Zn-G - 87 -

Iron P.E. P.A. Pure epoxy Al-G Zn-G - 88 -

Iron P.E. P.A. Pure epoxy Al-G Zn-G - 89 -

Iron P.E. P.A. Pure epoxy Al-G Zn-G - 90 -

Iron P.E. P.A. Pure epoxy Al-G Zn-G - 91 -

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