Epoxy-paint stripping using TEA CO2 laser: Determination of threshold fluence and the process parameters

Kumar, Manoj; Bhargava, Pankaj; Biswas, Abhik K.; Sahu, Shasikiran; Mandloi, V.; Ittoop, M.O.; Khattak, B. Q.; Tiwari, Mahavir Prasad; Kukreja, L. M.

doi:10.1016/j.optlastec.2012.04.021

Cited by 45 publications

(15 citation statements)

References 21 publications

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“…However, laser irradiation should reach the maximum layer thickness until all the coating system has been removed (Siggs, 2010). Partly, the level of laser fluence needed to ablate the coating layers depends on the threshold fluence (F T ) of the coated material, and the repetition rate of the laser pulse (Brygo et al, 2006;Han et al, 2017;Kumar et al, 2012;Razab, Jaafar, Rahman, & Saidi, 2014c, 2015.…”

Section: Laser Parametersmentioning

confidence: 99%

“…Despite the low optical absorption of the coating, laser fluence is required to reach the threshold fluence, which strongly depends on the pulse width parameter (Siggs, 2010). Threshold fluence is lower at shorter pulse width due to changes in the absorption coefficient (α) of the coating system at high intensity laser beams (Brygo et al, 2006;Kumar et al, 2012). However, Zhigilei and his team concluded that the pulse width did not have any significant effect on the threshold fluence (Zhigilei, Leveugle, Garrison, Yingling, & Zeifman, 2003).…”

Section: Laser Parametersmentioning

confidence: 99%

“…Coating removal mechanism begins after the absorption of laser intensity to the coating layers has exceeded the ablation threshold of the coated material (Metsios, Dai, Chard, McComb, & Kwon, 2018;Poprawe, 2011;Targowski et al, 2009). This can be described by the Beer -Lambert absorption law, as given in Equation ( 9) (Kumar et al, 2012;Lawrence, Minami, Li, Edwards, & Gale, 2002;Schmidt et al, 2003).…”

Section: Heat Affected Zonementioning

confidence: 99%

See 2 more Smart Citations

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

Razab

Noor

Jaafar

et al. 2018

Journal of Radiation Research and Applied Sciences

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Laser cleaning has been identified as an ideal technology to replace conventional chemical techniques in the motorcar coating removal process to maintain the sustainability of our environment. This is due to the unique characteristics of this cleaning technique, such as being versatile, precise, controllable, lack of waste generation, and environmental friendly process. This laser technique can remove the coating layers without using chemical products and prevents the metal substrate surfaces from defect. This paper reviews the potential of incorporating pulsed Nd:YAG laser and its principals in coating removal for automotive industry with respect to these characteristics.

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Section: Laser Parametersmentioning

confidence: 99%

Section: Laser Parametersmentioning

confidence: 99%

Section: Heat Affected Zonementioning

confidence: 99%

See 1 more Smart Citation

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

Razab

Noor

Jaafar

et al. 2018

Journal of Radiation Research and Applied Sciences

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show abstract

“…The laser radiation cleaning process has become a solid alternative to the more traditional methods of thermal, mechanical, and chemical nature in a wide range of materials and applications, such as removal of polymeric coatings [1,2,3,4,5]; cleaning of art works [6], antiquities, and buildings [7,8]; nuclear and biological decontamination [9]; mold cleaning [10]; and particle removal in the microelectronics and optics industries [11].…”

Section: Introductionmentioning

confidence: 99%

Stripping of PFA Fluoropolymer Coatings Using a Nd:YAG Laser (Q-Switch) and an Yb Fiber Laser (CW)

et al. 2019

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Fluoropolymers such as PFA are used as coatings for the protection of metal substrates due to their high chemical inertia and non-stick properties. These are “wear and tear” coatings and they degrade, at which point they should be removed for a new application. The removal of these types of coating by laser is of interest due to the process’s flexibility, precision, ease of automation, and environmental sustainability. The efficiency of the procedure was shown with the use of a source in a pulsed Nd:YAG and a source in continuous mode of fiber (Yb). The rates of stripping (cm2/min) and fluence (J/cm2) were analyzed and related to the power of the laser sources. Variations of the substrate after stripping were studied: roughness and hardness. The properties of the coating, thickness, roughness, water sliding angle, and microhardness were also evaluated. It was concluded that the laser in continuous mode was more efficient than the pulsed laser; laser removal of fluoropolymers has a strong relationship with reflectivity, and the mechanical and surface properties of the substrate after stripping remained virtually unchanged.

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“…Advances have been developed in the aeronautical sector mainly with epoxy resins, epoxy polyamide, and polyurethane. Thus, excimer Nd:YAG and CO 2 lasers [28], CO 2 laser [29,30], diode laser [31], and Yb fiber laser [32] have been applied for various stripping jobs on these materials.…”

Section: Introductionmentioning

confidence: 99%

Study on the Main Influencing Factors in the Removal Process of Non-Stick Fluoropolymer Coatings Using Nd:YAG Laser

et al. 2019

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The coatings with fluoropolymer resins rich in fluorinated ethylene propylene (FEP) and polytetrafluoroethylene (PTFE) are applied as anti-adherent coatings on aluminum–magnesium substrates for use in food containers. In many cases, due to wear, they must be stripped for the application of a new coating on the same substrate. There are several processes for this: blasting, plasma, pyrolysis, chemical processes, laser, high pressure water, and combinations of these. This work focuses on the characterization of the main factors that condition the FEP coating removal process by a continuous wave (CW) Nd:YAG laser, and on the determination of the efficiency of this type of technology used for this purpose. Stripping surface per unit of time and energy consumption per unit area has been determined among other efficiency indicators. Regarding the characterization of the coating object of study, its thickness, surface roughness, contact angle, microhardness and absorbance-reflectance responses have been determined, and the results have been compared with those obtained in the case of PTFE. In addition, to evaluate the mechanical damage caused in the substrate after coating removal by (CW) Nd:YAG laser, the tensile strength, Vickers hardness, Ra and Rz roughness, and the substrate thickness have been measured and analyzed.

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Epoxy-paint stripping using TEA CO2 laser: Determination of threshold fluence and the process parameters

Cited by 45 publications

References 21 publications

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

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

Stripping of PFA Fluoropolymer Coatings Using a Nd:YAG Laser (Q-Switch) and an Yb Fiber Laser (CW)

Study on the Main Influencing Factors in the Removal Process of Non-Stick Fluoropolymer Coatings Using Nd:YAG Laser

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