银表面分子自组装膜的防腐性能

SELF-ASSEMBLED LAYER ON SILVER FOR PROTECTION AGAINST CORROSION

用 3 巯基丙基三甲氧基硅烷 (MPS)在银电极表面制备了自组装单分子膜 ,研究了该组装膜在 0 1 mol·L-1 NaOH溶液中对银的防护作用 .通过极化曲线、接触角及俄歇电子能谱等方法对组装膜的极化电阻、腐蚀电流及表面状况进行了研究表征 ,得到了最佳MPS组装液浓度为 0 1 mmol·L-1 和最佳组装时间为 6 h下的腐蚀电位、腐蚀电流密度、极化电阻和缓蚀率等结果 .

Self-assembled monolayer of 3-mercaptopropyltrimethoxysilane (MPS) adsorbed on the surface of silver was constructed and protection ability of the monolayer against corrosion in 0.1 mol &middot L-1 NaOH solution was studied by polarization techniques, contact angle and Auger electron spectra (AES). Results of polarization curves show that the most effective MPS pretreatment concentration in ethanol is 0.1 mmol &middot L-1 for 6 h. The corrosion potential, corrosion current density, polarization resistance and efficiency were obtained. Assembly mechanism was shown by contact angle and AES.