surface polarization current density 表面极化电流密度
With the decrease of film thickness, the cathodic polarization current density of 7B04 Al-alloy increases, and the anode reaction is suppressed.
液膜厚度减小，7B04铝合金阴极极化电流密度增加，阳极反应受到抑制；
When the current density is too low, the cathode polarization effect, smaller coating, not even orange crystal bulky coating.
当电流密度过低时﹐阴极极化作用较小﹐镀层桔晶粗大﹐甚至没有镀层。
When coating surface resistivity test on a longer pipeline is conducted, the pipeline can be divided into several sections to calculate it with polarization potential and current density.
在对长管道的涂层面进行电阻率测量时，可将管道分成若干段，通过极化电位和电流密度对涂层电阻车进行计算。
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