Cathode polarization degrees vary with rare earth content.
镀液的阴极极化程度随稀土含量的不同而改变。
But can't think that the larger the cathode polarization effect the better.
但是不能认为阴极极化作用愈大愈好。
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。
The cathode polarization: dc through electrode, the cathode potential deviating from the balance to the negative potential moves in the direction of the phenomenon.
阴极极化：直流电通过电极时，阴极电位偏离平衡电位向负的方向移动的现象。
Because the cathode polarization effect more than a range, will lead to a large number of hydrogen, and separation coating becomes porous, rough, loose, scorched, even the powder, quality just drop.
因为阴极极化作用超过一定范围，会导致氢气的大量析出，从而使镀层变得多孔、粗糙、疏松、烧焦，甚至是粉末状的，质量反而下降。
Practice shows that improve the metal electrical crystallization in the cathode polarization effect, can improve the generation of the nucleation rate, easy to get crystallization meticulous coating.
实践表明：提高金属电结晶时的阴极极化作用，可以提高晶核的生成速度，便于获得结晶细致的镀层。
Experiment results indicated that rare earth could improve the hardness of bright nickel plating, the cathode polarization ability, the substrate bond strength and the grinding ratios of diamond tool.
研究结果表明，在镀液中添加稀土可以提高亮镍镀层的硬度和镀液的阴极极化能力，提高镀层与基体的结合强度和金刚石工具的磨削比。
Experiment results indicated that rare earth could improve the hardness of bright nickel plating, the cathode polarization ability, the substrate bond strength and the grinding ratios of diamond tool.
研究结果表明，在镀液中添加稀土可以提高亮镍镀层的硬度和镀液的阴极极化能力，提高镀层与基体的结合强度和金刚石工具的磨削比。
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