表面塗裝對A516壓力容器用鋼及304不銹鋼在400℃模擬海水環境下之抗腐蝕性質研究

Effect of surface coating on the corrosion behavior of A516 pressurized-vessel steel and 304 stainless steel at 400℃ in a simulated NaCl-containing atmosphere

本研究主要探討表面塗裝改質對A516壓力容器用鋼及304不銹鋼在400℃模擬海水環境之抗蝕性能。研究結果顯示，在模擬含NaCl之水汽環境下，兩式鋼材經表面塗裝之腐蝕動力學皆遵守拋物線定律，而A516鋼材之腐蝕速率較304不鋼略快。兩式鋼材經表面塗裝改質後之腐蝕生成物皆含有氧化矽（SiO2）及氧化鈦（TiO2），並含有微量的氧化鈦鐵（Fe2TiO5）。

The effect of surface coating on the corrosion behavior of A516 pressurized-vessel steel (A516) and 304 stainless steel (304SS) at 400℃ in a simulated NaCl-containing environment. was investigated. The results showed that the corrosion kinetics at 400℃ for both steels obeyed the parabolic rate law. The corrosion rate of A516 was slightly faster than that of 304SS. The scales formed on both A516 and 304SS consisted of SiO2 , TiO2 , and minor Fe2TiO5.