| Summary: | 碩士 === 國立臺灣海洋大學 === 河海工程學系 === 94 === This study is aimed to use various micro/nano coating materials on carbon steel plate for marine antifouling investigation. Coating testings such as acid and alkaline resistance, hardness, adhesive force, impact strength and tensile strength test were performed following the specifications of National Chinese Standards. And, accelerated marine immersion test was conducted using blended seawater, which was mixed with 5 wt.% calcium phosphate for seaweed fast growth. Testing specimen was 20(L) x10(W)x0.6(H)cm rectangular A36 steel plate. The micro/nano coating materials includes silicate mixture, titanium dioxide mixture, chlorine rubber resin mixture, tin-free unsaturated resin mixture, tin-free acrylic resin mixture and chlorine rubber polymer (with various percentages of zinc oxide).
SEM observation found that the particle sizes are about 10~500nm for the coating materials. The chlorine rubber mixed 15 wt.% zinc oxide exhibits excellent acid and alkaline resistance, hardness, adhesive force and impact-resistance and has the lowest area of seaweed adherence. Silicate mixture has high hardness but poor acid and alkaline resistance and impact resistance. Titanium dioxide mixture coating after immersion test demonstrates significant decrease in impact resistance and tensile strength.
|
|---|
