Development of thermal spray coatings with long-term corrosion protection and anti-biofouling properties for steel structures in the sea

本课题是为研制具有长期防腐和抗生物污性能的适用于船舶底部的热喷涂金属涂层而开展的。将金属锌电弧喷涂到钢基材上，制成高孔隙率或低孔隙率、表面粗糙或光滑、有或没有密封处理的涂层。在海水中浸泡一年半后发现，表面光滑的涂层具有优于本研究中其他涂层的抗生物污性能，而密封处理对涂层的抗生物污性能有不良影响。

The present work is carried out for the development of thermal sprayed metal coatings applicable to the bottom of ships, which have long-term corrosion protection and anti-biofouling properties. Metallic zinc is arc-sprayed onto steel substrates and coatings are produced of high porosity or low porosity, of rough surface or smooth surface and with or without sealing treatment. After immersing the coatings in the sea for one year and a half, it is revealed that the coating with a smooth surface has an anti-biofouling properties superior to other coatings in the present work and that the sealing treatment has an undesirable effect on the anti-biofouling properies.