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11OutlineIntroductionSol-gel coating systemsSol-gel thin coating as metal surface treatmentSol-gel/epoxy resin hybrid coatingSummary

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Introduction

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Coating(1) (2) (1) (2)

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Main point 5

Formation of sol-gel network-M(OR)z-1(OH) M(OR)z-1(OH)+ROH 2M(OR)z-1(OH) (RO)z-1M-O-M(OR)z-1+H2O /RSi(OR)3+H2O RSi(OR)2(OH)+ROH Al(OR)3+H2O HO-Al(OR)2+ROH ~~RSi(OR)2(OH)+HOAl(OR)2~~ ~~RSi(OR)2-O-Al(OR)2~~

6Interaction of sol-gel network with the primer or topcoat-

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Sol-gel coating systems Table 1-

8/-/--Solid content5%2~4%17%45%pH2.0~3.010.55.06.0Viscosity(cp 20)-612550Appearance

Sol-gel coating systems -pH 2.5%9

Sol-gel coating systems/ (17%) / (3-glycidoxypropyl)Trimethoxysilane2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane 120 - 45%-3

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10Corrosion inhibitors11 Hybrid inorganic/organic coating-EPI-REZ5522-WY-55EPT-CURETM

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Table 2 -/13- -/shell EPI-REZ 5522-WY-55 -/deft44W022-1:61:31:11:1(days)1515157(mil)1.5221.25802h

Sol-gel thin coating as metal surface treament: (1) (2)-24h

14 Table 3 -15pH10.510.5--6655

Corrosion resistance

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16Abrasion and corrsion testing

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Abrasion resistance1302h5%HCl0.1N NH4OH

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Sok-gel/epoxy resin hybrid coatings: UV ()

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Sok-gel/epoxy resin hybrid coatings

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Summary21

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The end