表面粗度 및 形狀에 따른 에폭시 塗膜의 防錆性能 評價

Abstract

Mechanical surface preparation has been the traditional approach to preparing metal substrates for subsequent coating systems. Surface preparation methods vary from the most rudimentary hand scraper to laser beams. The broad spectrum of tools available suggests that surface preparation is in fact a complex process and therefore requires a good understanding of the mechanical surface preparation process and job parameters that dictate the process. As an aid in selecting the proper mechanical surface preparation process, the following brief discussion of job parameters and associated techniques is provided. in this study, several abrasives were evaluated regarding their effectiveness. Total of 5 different surface preparation process (3 different blast cleaning, 1 power tooling, no treatment) were selected and each was evaluated in them of resultant surface profile, subsequent coating qualities including long term corrosion resistance, and other pros asnd cons. The effects of surface profile on corrosion protection were examined by hygrothermal cyclic immersion test and salt spray test. pull-off adhesion test, creepage from scribe test, electrochemical impedance spectroscopy(EIS) test were carried out to evaluate the effects of surface profile the results indicated that grit blast cleaning was the best performance.