Grey scale promoted through laser ablation onto phosphate coated zinc commercial plates

authors	Rey-Garcia, F; Costa, FM; Fernandes, AJS; Oliveira, FJ; Rino, L; Bao-Varela, C
nationality	International
journal	OPTICS AND LASERS IN ENGINEERING
author keywords	Zinc; Laser ablation; Surface processing; Decorative coatings; Grey scale
keywords	THIN-FILMS; CONVERSION COATINGS; STEEL; DEPOSITION; ALLOYS; PULSES; LAYERS; AL
abstract	Phosphate coated zinc commercial plates (Anthra-Zinc (R)) have been processed by laser ablation in the nanosecond pulsed regime varying the repetition rate at 10, 20 and 50 kHz. Phosphate coating was completely characterized. By monitoring the fluence it was possible to define three different processing regimes: phosphate ablation (up to 116 J/cm2), zinc ablation (up to 288 J/cm2) and zinc melting (at 375 J/cm2). 3D profilometry was used to assess both the roughness and depth parameters corresponding to each regime. The brightness was estimated from 450 to 800 nm by reflectance studies. Consequently, a long-lasting grey scale was attained envisaging in- and outdoor decorative uses.
publisher	ELSEVIER SCI LTD
issn	0143-8166
year published	2018
volume	108
beginning page	78
ending page	86
digital object identifier (doi)	10.1016/j.optlaseng.2018.04.018
web of science category	Optics
subject category	Optics
unique article identifier	WOS:000437068200009