12 September 2002 Parameters and mechanism of laser cleaning rust deposit on the steel surface
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Abstract
The mechanism of laser cleaning rust deposit on the steel surface was studied experimentally. Especially, the parameters and mechanism of cleaning rust deposit from steel surface with pulsed YAG laser was studied in detail. The practical application of laser cleaning in maintenance was discussed in this paper. A pulsed YAG laser and a continued CO2 laser was used to do some experiment comparatively. The results demonstrated that the effect of pulsed YAG laser is better than continued CO2 laser. The pulsed YAG laser can accomplish complete cleaning by regulating parameters of laser, however, the continued CO2 laser can not. There are cleaning threshold and damage threshold in laser cleaning. Between the initial cleaning threshold and complete cleaning threshold, cleaning percentage of the surface increases with the increasing of laser fluence and pulse number, but does not depend on repetition rate. The mechanism of laser cleaning rust deposit with pulsed YAG laser is suggested: the vibration of deep rust deposit and thermal shock action induced by laser-supported detonation (LSD) to make rust particles sputter is primary, however, the thermal effect of laser irradiation is secondary.
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Zhenyong Sun, Jun Xu, Wengming Zhou, "Parameters and mechanism of laser cleaning rust deposit on the steel surface", Proc. SPIE 4915, Lasers in Material Processing and Manufacturing, (12 September 2002); doi: 10.1117/12.482918; https://doi.org/10.1117/12.482918
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