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。
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.
晶粒细小，结构疏松，应变能大的氧化镁粉末具有较高的活性。
MgO powders, with small particle size, loose structure and high strain energy, have high activity.
本品为极细白色粉末，该产品主要在食品中作强化剂、疏松剂和钙的营养补充剂、既可以降低成本，又可作为基质材料。
This product is very fine white powder. It is mainly used as enhanced agent, loose agent, and calcium supplement in food. Not only can lower cost, but also can be basic material.
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