The results show that the phosphating film formed under ultrasonic wave is granule and acicular crystal,it is even,smooth,dense.It has better corrosion resistance and binding force.

• 结果表明:在超声波条件下形成的磷化膜属于颗粒和针状(混合)型晶体,且分布均匀,平滑,细密,完整,并有较好的耐蚀性和结合力。