镍材焊接时易形成气孔和裂纹等缺陷，严重地影响焊接接头的质量。
Defects such as blowholes, cracks can be easily formed during welding process of nickel materials, which will severely affect the quality of the welding joint.
其原理是把金属粉末作为添加剂混入到树脂结合剂中，在修整砂轮后进行电解处理，使其表层的金属成分溶解，形成气孔。
Its principle is adding the metal powder into the resin binder as addition, then electrolyzing after addressing the wheel, so that the metal content can be dissolved and the pinholes are formed.
肯德基门铝型材有其独特性，采用普通焊接方式焊接容易形成气孔，也容易在焊缝中生成杂物，不利于肯德基门的长期使用。
KFC has its unique aluminum door, using ordinary welding welding is easy to form pores, it is easy to generate debris in the weld is not conducive to long-term use KFC door.
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