Mehod for the Removal of a Coating from a Metal Substrate by Laser Ablation

Hasib Mustafa (Inventor), David Thomas Allan Matthews (Inventor), Gerardus Richardus, Bernardus, Engelina Römer (Inventor), Ellen van der Aa (Inventor)

Research output: Patent

Abstract

The invention relates to a method for removal of a zinc-based coating from a metal substrate provided with a zinc based coating by means of laser ablation, wherein the method include the steps of: - providing a metal substrate with a zinc-based coating, - defining a surface area from which the zinc-based coating is to be removed, - controlling a laser device to provide a laser beam for ablation of the zinc based coating, wherein the laser device provides a pulsed laser beam with a wavelength in a range of 680 – 1500 nm and a pulse duration in a range of 1 – 900 ps, - determining the thickness of the zinc based coating layer, - setting the fluence of the laser beam to a value above a threshold value for the ablation of the zinc based layer and determining the number of pulses per laser spot area required for the ablation of the zinc based coating over the complete thickness thereof, - positioning and moving the laser device and the metal substrate relative to each other, and removing the zinc based coating from the metal substrate over the defined surface area.
Original languageEnglish
Patent numberWO/2021/013939
IPCB23K 26/40 2014.01,B23K 26/362 2014.01
Priority date25/07/19
Filing date23/07/20
Publication statusPublished - 28 Jan 2021

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