Substrate Cleaning Threshold for Various Coated Al Alloys Using a Continuous-Wave Laser
Xudong Sun,
Qiansong Yu,
Xiaoyu Bai,
Guangyong Jin,
Jixing Cai,
Boshi Yuan
Affiliations
Xudong Sun
Provincial and Ministerial Collaborative Innovation Center of Advanced Optoelectronic Technology, Changchun University of Science and Technology, Changchun 130022, China
Qiansong Yu
Provincial and Ministerial Collaborative Innovation Center of Advanced Optoelectronic Technology, Changchun University of Science and Technology, Changchun 130022, China
Xiaoyu Bai
Provincial and Ministerial Collaborative Innovation Center of Advanced Optoelectronic Technology, Changchun University of Science and Technology, Changchun 130022, China
Guangyong Jin
Provincial and Ministerial Collaborative Innovation Center of Advanced Optoelectronic Technology, Changchun University of Science and Technology, Changchun 130022, China
Jixing Cai
Provincial and Ministerial Collaborative Innovation Center of Advanced Optoelectronic Technology, Changchun University of Science and Technology, Changchun 130022, China
Boshi Yuan
Provincial and Ministerial Collaborative Innovation Center of Advanced Optoelectronic Technology, Changchun University of Science and Technology, Changchun 130022, China
In this study, different coatings (gray epoxy primer, white epoxy varnish and red alkyd paint) of 7075 aluminum alloy are cleaned with a 500 W continuous-wave (CW) fiber laser. We analyzed the influence of the laser power density on the temperature evolution and target surface morphology. Under the condition of continuous laser irradiation for 1 s, the experimental results indicated that the suitable cleaning thresholds of epoxy primer, epoxy primer and epoxy varnish, as well as epoxy primer, epoxy varnish and alkyd paint were 177.74, 192.89 and 147.44 W/mm2. The results show that the cleaning threshold of thicker three-layer paint target was smaller than the single-layer paint layer, and we analyze the mechanism of this phenomenon.
