Seam surface defect after grinding or thickness is lower than base material after mechanical treatment.
打磨焊缝表面缺陷或机械损伤后的厚度小于母材的厚度。
It is found that the surface defect like black stripes appeared in certain surface regions of die-casting wheel hub AM60B magnesium alloy after acid pickling in the anti-corrosion treatment.
在对AM 60 B镁合金轮毂压铸件进行表面耐蚀处理时，发现在前处理酸洗后，表面某些区域会产生黑色条纹状缺陷。
The experiment results show that four kinds of carbon-oxide and the tiny surface defect can be formed on the surface of carbon fibers by anod surface treatment.
实验结果表明，阳极氧化能较大地增加碳纤维表面的化学活性和物理活性。
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