Effect of Water-jet on Laser Paint Removal Behaviour

A review of incorporating Nd:YAG laser cleaning principal in automotive industry

“…The current experimental results showed that laser cleaning can be a good alternative for the conventional chemical cleaning process in coating removal (Chen, Kwee, Tan, Choo, & Hong, 2010;Madhukar, Mullick, & Nath, 2013b, 2013aNaguy & Straw, 2010;Xiaoguang et al, 2017). Hence, a systematic and effective coating removal system is urgently needed for a thorough old coating removal in the car recoating process (Shu-Dong et al, 2012;Tsunemi et al, 1996).…”

“…The unique characteristics of laser cleaning include being versatile, precise, controllable, selective, and an environmentally friendly process. It is capable of removing the coatings from a substrate's surface, and it has been utilized in various industries (Lee & Watkins, 2000;Madhukar et al, 2013a).…”

“…Laser coating removal can occur through ablation and thermal decomposition mechanisms, either photothermally or photochemically, or both (Madhukar et al, 2013a;Sanjeevan & Klemm, 2005). Three possible types of interaction processes may occur during the ablation and thermal decomposition mechanisms in coating removal, which are photothermal, photochemical, and photomechanical interactions (Coutouly et al, 2009).…”

“…Two basic mechanisms have been considered in laser coating removal known as laser ablation and thermal decomposition processes (Mongelli, 2005). Both mechanisms offer advantages for coating removal, in terms of technical aspects, such as no direct mechanical or chemical contact to the substrate, in situ cleaning, less cleaning time, nonuse of toxic solvents and chemical products, no damages to the metal substrate, and controllable cleaning (Madhukar et al, 2013a;Morais et al, 2010). However, these advantages become the opposite if the mechanism is not properly controlled with the right operational laser parameter setup.…”

“…The ideal coating removal process in the automotive industry should have the following characteristics; a. reproducible clean surfaces, b. controllable and accurate removal area, and c. minimal detrimental effects on car's metal substrate. The laser based coating removal process was found to offer these advantages (Kumar et al, 2014;Madhukar, Mullick, Chakraborty, & Nath, 2013a;Zhang et al, 2018). The use of laser technology to remove coated layers from a surface has been studied for many years with a variety of lasers, coatings, and substrates (Schmidt, Li, & Spencer, 2003).…”