... 总颗粒面 total grain surface 颗粒橡胶面 studded rubber 若这个颗粒发射面 injection surface ...
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The total quantity of corrosion surface defect is decreased due to the decrease of grain boundary energy with the increase of grain size and the atmospheric corrosion resistance is increased.
但是晶粒尺寸增大后晶界处因局部腐蚀电流密度增大将会在局部造成更深的腐蚀坑槽并降低耐候性；
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