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在不锈钢的电位低于稳态点蚀电位E_p时。其钝化膜可发生破裂和修复的交替现象。本工作研究了由于出现亚稳态点蚀导致的电荷转移,此时电位可低达-210 mV(SCE)。在亚稳态点蚀的生长期内,蚀孔外被多孔的残留钝化膜所覆盖,腐蚀电流密度近似为一常数。亚稳态点蚀的生长速度基本上为多孔的覆盖膜的欧姆电阻所控制。如果此残留的钝化膜破裂,就会导致蚀孔的重新钝化。在重新钝化过程中,钝化膜向二维方
When the potential of stainless steel is lower than the steady-state pitting potential E_p. The passivation film can occur rupture and repair of the alternating phenomenon. This work investigates the potential transfer as low as -210 mV (SCE) due to metastable pitting. In the metastable pitting growth period, the pits are covered by a porous residual passivation film, and the corrosion current density is approximately constant. The metastable pitting growth rate is essentially controlled by the ohmic resistance of the porous coverlay. If this residual passivation film ruptures, it will lead to re-pass hole erosion. In the re-passivation process, passivation film to two-dimensional side