噁二唑缓蚀膜的制备及抗腐蚀性能研究

Study on the Preparation and Anticorrosion of Oxadiazole Self-assembled Monolayers

摘要:

以二芳基酰肼为原料合成2,5-二苯基-1,3,4-噁二唑(PPD)，在碳钢表面制备噁二唑自组装分子膜。采用表面分析技术、电化学测试等方法对PPD分子膜的制备条件及在3.5% NaCl溶液中的缓蚀性能进行了分析，通过量化计算对缓蚀机理进行了进一步的探讨。结果表明，PPD自组装膜的最佳组装条件为4 mmol•L-1组装液中组装12h，缓蚀效率达91.95%，XPS测试结果表明PPD分子在钢表面形成自组装膜，量化计算得到了缓蚀剂分子的活性位点。

Abstract:

Self-assembledmonolayers (SAMs) of 2,5-Diphenyl-1,3,4-oxadiazole (PPD) synthesized by 2-ary1 hydrazine were fabricated on carbon-steel surface.The preparation conditions and corrosion inhibition of PPD SAMs were investigated by electrochemical measurement and surface analysis techniques. The inhibition mechanism of oxadiazole was further discussed by quantitative calculation. The results showed that the film assembled at4 mmol•L-1 concentration for 12 h possessed the best inhibition efficiency,which was up to 91.95%.The monolayers on the steel surface were detected through the X-ray photoelectron spectroscopy (XPS). The active region was verified by quantum chemistry calculation.