黄铜表面硅烷自组装膜在氯化钠溶液中的耐蚀性

采用自组装技术在黄铜表面分别制备γ-巯基丙基三甲氧基硅烷(PropS-SH)、十二烷基三甲氧基硅烷(DTMS)、氨基丙基三甲氧基硅烷(APS)和γ-氯丙基三甲氧基硅烷(CPTMS)自组装膜,并分别采用电化学极化法、接触角测试和傅里叶红外光谱研究硅烷膜的耐蚀性、疏水生和结构.结果表明:经PropS-SH、DTMS和CPT...

Corrosion resistance of brass modified with selfassembled silane films in NaCl solution

Self-assembled monolayers(SAMs) of 3-mercaptopropyltrimethoxysilane(PropS-SH),dodecyl-trimethoxysilane(DTMS),(3-aminopropyl)trimethoxysilane(APS) and chloropropyltrimethoxysilane(CPTMS) were formed on brass surface.The corrosion resistance,hydrophobicity and structure of silane films were studied by electrochemical polarization,contact angle measurement,and Fourier transform infrared reflection(FT-IR) spectroscopy.The results indicated that the corrosion resistance of brass is improved after PropS-SH,DTMS or CPTMS silanization treatment.The corrosion resistance of PropS-SH film is the best,which can be explained as follows:the PropS-SH is chemically adsorbed to the brass surface and a silane film is formed by Si─O─Si crosslinking,thus providing an excellent barrier against the diffusion of oxygen molecules from the solution to the brass surface.The corrosion current density and inhibiting efficiency of PropS-SH silane film on brass are 0.2 μA/cm2 and 97.4%,respectively.