The passivated film is gradually formed and improved during the process of desalination, and the process agrees well with the positive shift of steel potential and the increase of RC value.

• 脱盐处理改变了钢样表面的微观结构组成，脱盐后钢样表面再钝化膜的形成是一个不断完善的过程且该过程与电位正移以及RC值的提高具有一致性。