While NaOH concentration of the lye is 2M or more, the surface diffusion rate don't vary with the concentration increasing, It's in accordance with Fick diffusion principle. This can be used to explain some phenomena in chemical decortication. 当碱液中氢氧化钠浓度为2M或更高时,其表面扩散速率与浓度的增加无关,这种现象与菲克(Fick)扩散原理是一致的,该原理可用于解释化学去皮过程中所产生的一些现象。