1990 Volume 63 Issue 8 Pages 458-462
The leaching behavior of copper and triphenyltin (TPT) from several antifouling paints containing cuprous oxide and triphenyltin compounds has been studied. The triphenyltin compounds used as antifoulant were triphenyltin fluoride (TPTF), triphenyltin hydroxide (TPTOH) and triphenyltin chloride (TPTC). After the antifouling paints were coated on the fiber-reinforced plastic (FRP) test panels (2×70×150mm, 210cm2), they were immersed in seawater at Maizuru Bay, Kyoto Prefecture, from December 1987 to June 1989. Then, leaching rates of copper and TPT from antifouling paint films were measured by means of atomic absorption spectrometry (AAS) and gas chromatography with flame photometric detection (GC-FPD), respectively. From this study, it was found that the initial leaching rates of copper and TPT were 75-100 and 0.5-151μg/cm2/day, respectively. Leaching rates after 18 months of the immersion were 20-30 and 0.8-1.8μg/cm2, day for copper and TPT, respectively.