The results showed the surfacecontamination produced in sample preparation and treatment can be eliminated if the sample was sputtered for enough time.
Adopting optimized machining parameters of Laser-Microjet, higher cutting speed, higher surface quality, no surfacecontamination, and no oxidation is visible.
采用优化的水导引激光加工参数，对材料去除效率高，加工质量好，不产生污染空气的加工产物。
3
A three layer of aluminum exposed to atmosphere is identified: the aluminum and its native oxide, the corrosion layer atop oxide aluminum, and a surfacecontamination layer.