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

本工作是为研制具有长期防腐和抗生物污损性能的船底热喷涂金属涂层而开展的。金属锌是在钢的表面进行电弧喷涂，得到的涂层具有高孔隙率或低孔隙率，表面粗糙或光滑，并进行或不进行密封处理。在海水中浸泡一年半后，发现表面光滑的涂层的抗生物污损性能优于本工作中的其他涂层，封口处理对抗生物污损性能的影响不理想。

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.