The effects of the nano-TiO2 on the interfacial corrosion behavior of immersed coatings

摘要

Based on the study of acrylic polyurethane coatings immersed in 3.5% (wt) NaCl solution, the interfacial corrosive behavior can be investigated dynamically by electronic speckle pattern interferometry (ESPI) and scanning electrochemical microscopy (SECM). Moreover, the effects of nano-TiO_2 on the interfacial behavior can be valued by the addition of nano-TiO_2. The results show that the interfacial variety during the beginning of coating failure can be detected by ESPI, which can get the same results combined with SECM. The addition of nano-TiO_2 slows down the interfacial variety, which reflects that the anti-corrosion properties of coatings can be improved.