Iron Corrosion Inhibition by Silicate Coating

• Main Authors: Yu-Feng Yang, 楊育峰
• Other Authors: Huey-Chuen I. Kao
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/06895141729224171892

碩士 === 淡江大學 === 化學學系碩士班 === 95 === In this research, sol−gel method is employed for making organic−inorganic composite films to cover the iron surface and prevents the corrosion of Fe by the atmosphere. Hydrolysis and condensation reactions of the alkoxysiliane, such as TEOS (tetraethoxysilane), phTrEOS (phenytriethoxysilane), apTrEOS (3-aminopropyltriethoxysilane) or TMOS (tetramethylsilane), silicate structure was formed. Addition of PMMA (polymethylmethacrylate), PANI (polyaniline) or nano mica, the organic−inorganic composite liquid is coated on the surface of iron plates, which is heat treated at 120°C for 24 h. The sol−gel reactions were followed y the FT-IR and NMR spectra. Nano particles, about 100−200 nm, were observed on the films under an SEM. The solutions prepared by aniline, NMP, TEOS and PMMA show the best anticorrosion effect. Most of the films under the salt spray test (SST) for more than 200 h, the corroded area was ≦ 15%. Their hardness was ≧ 8H and ≦ 15% areas were removed by the adhesion test. Electrochemical analyses also prove the anticorrosion effect caused by the coated films.