dissociated hydrogen 中文意思是什麼
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If the quantity of sr is over some value ( 0. 02 % - 0. 04 % ), the melt will absorb hydrogen, and result in the formation of cavities. we think the reason is that the dissociated sr destroyed the compact oxide film of the melt
Sr的加入量過多（ 0 . 02 0 . 04 ）后，反而出現吸氣現象，導致形成孔洞缺陷，我們認為這是游離態sr破壞了al - si合金的緻密氧化膜所致。
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