Enhancement corrosion resistance of (3-glycidoxylpropyl)-silsesquioxane hybrid films and its validation by gas-molecule diffusion coefficients using MD simulation

摘要

Based on silsesquioxanes (SSO) derived from hydrolytic condensation of (γ-glycidoxylpropyl) trimethoxysilane (GPMS) and tetraethoxysilane (TEOS), two hybrid films, f-GPMS-TEOS-SSO (f-GTS) modified with 10 wt-% TEOS and f-GTS modified with 50 wt-% DGEBA (f-GTSD), were prepared. The anticorrosion properties (corrosion potential, E_(corr), and corrosion current density, I_(corr)) of the bare aluminum alloy (AA) and the two films on AA were tested by electrochemical measurements with typical potentiodynamic polarization curves. The I_(corr) values of three samples were significantly different with the order of f-GTSD