聚苯胺/凹凸棒石与磷钛粉协同型防腐蚀涂料的性能

Corrosion Resistance of Polyaniline/Attapulgite- Phosphorous/Titanium Powder Composite Anticorrosion Paint

传统的聚苯胺颗粒粗大,在涂料中分散性差,涂料制备成本高。以聚苯胺/凹凸棒石(PANI/ATP)与磷钛粉为防腐蚀填料,环氧树脂为成膜物质,制备了聚苯胺/凹凸棒石与磷钛粉(PAP-C)协同型防腐蚀涂料。通过电化学交流阻抗(EIS)和开路电位(OCP)对其涂层防腐蚀性能进行了表征,探讨了PANI/ATP用量、颜基比和分散剂用量对PAP-C涂层的力学性能和防腐蚀性能的影响。结果表明:PAP-C涂层较磷钛粉(P-C)涂层具有更好的防腐性能及更高的耐冲击强度;当PANI/ATP用量为4%,颜基比为1.00,分散剂用量为1.0%时,PAP-C涂层耐冲击强度50 cm,附着力1级,柔韧性2 mm,可耐中性盐水(3.5%Na Cl)腐蚀60 d。

With polyaniline/attapulgite(denoted as PANI/ATP) and P-Ti powder as the anticorrosion additives,epoxy resin as the binder,composite anticorrosive paint(denoted as PAP-C) was prepared.The anticorrosion behavior of as-prepared PAP-C coating was evaluated based on measurements of the electrochemical impedance spectrum and open-circuit potential,and the effects of PANI/ATP dosage,mass ratio of pigments and matrix,and dispersanl dosage on the mechanical properties and anticorrosion behavior of PAP-C coating were investigated.Results indicated that the PAP-C coating had better corrosion resistance and larger impact strength than P-C coating.Particularly,the PAP-C coating made at a PANI/ATP dosage of 4%(mass fraction;the same hereafter),a pigment to matrix ratio of 1.00,and a dispersant dosage of 1.0%exhibited an impact strength of 50 cm,adhesion force of grade 1,a flexibility of 2 mm,and an endurance of 60 d in neutral saline(3.5%NaCl).