Research Progress of Laser Derusting Technology in Coating Pretreatment

Zhonghan Yu; Li Yin; Yanlong Xu; Yuantao Zhao; Tao Jiang; Jianmin Ling; Wenge Li

doi:10.3788/LOP223299

Journals >Laser & Optoelectronics Progress >Volume 61 >Issue 5 >Page 0500006 > Article

Laser & Optoelectronics Progress
Vol. 61, Issue 5, 0500006 (2024)

Research Progress of Laser Derusting Technology in Coating Pretreatment

Zhonghan Yu¹, Li Yin^1,*, Yanlong Xu², Yuantao Zhao²..., Tao Jiang², Jianmin Ling³ and Wenge Li²|Show fewer author(s)

Author Affiliations

¹School of Logistics Engineering, Shanghai Maritime University, Shanghai 201306, China

²Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China

³Shanghai Liangshi Intelligent Technology Co., Ltd., Shanghai 201413, China

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DOI: 10.3788/LOP223299 Cite this Article Set citation alerts

Zhonghan Yu, Li Yin, Yanlong Xu, Yuantao Zhao, Tao Jiang, Jianmin Ling, Wenge Li. Research Progress of Laser Derusting Technology in Coating Pretreatment[J]. Laser & Optoelectronics Progress, 2024, 61(5): 0500006 Copy Citation Text

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Three adhesion forces between surface particles and substrate. (a) Van der Waals force; (b) capillary condensing force; (c) electrostatic double layer force [11]

Fig. 1. Three adhesion forces between surface particles and substrate. (a) Van der Waals force; (b) capillary condensing force; (c) electrostatic double layer force^[11]

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Fig. 2. Structure diagram of corroded layer on steel surface

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Fig. 3. Bright spot characteristics. (a) Bright spot morphology^[32]; (b) pulse laser spot energy distribution^[4]

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Fig. 4. Lapping effect diagram. (a) Schematic diagram of surface covering; (b) schematic diagram of spot lap rate

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Fig. 5. Actual rendering of laser derusting under different defocus quantities^[45]. (a) +3 mm; (b) +2 mm; (c) 0 mm; (d)－2 mm; (e)－3 mm

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Fig. 6. Diagram of laser intelligent rust removal equipment^[46]

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Fig. 7. Working flow chart^[46]

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Fig. 8. Schematic diagram of laser cleaning monitoring structure^[55]

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Rust removal technology	Classification	Advantage and disadvantage
Traditional derusting	Manual and mechanical grinding	Low efficiency，difficult to reach the cleaning standard
	Chemical dissolution	Large amount of solvent required，low cleaning efficiency，easy to cause environmental problems
	Ultrasonic cleaning	Rust removal efficiency is fast，but the cost is high，secondary treatment is required，and the noise is loud
	High pressure water gun	Environmentally friendly and clean，but it will cause waste of water resources and noise pollution
	Sandblasting	Derusting effect is excellent，but it will affect the health of workers
Advanced technique	Laser derusting	Greatly reduce the cost of rust removal process，and it is green and environmentally friendly with high cleaning efficiency

Table 1. Advantages and disadvantages of derusting technology

Research Method（Mechanism）	Model	Effect
Combined adhesive force and surface wave generated clearance force	Mathematical models of three kinds of adhesion forces between particles and matrix	Interaction between submicron particles and matrix was investigated for the first time，which provided the basis for the subsequent research
From a one-dimensional model to a three-dimensional model	Unsteady three-dimensional model of particles	Forces between particles are considered，providing an accurate model for smaller particle diameters
Errors are considered on the basis of the existing model	Double layer thermoelastic vibration model	Cleaning and damage thresholds of the matrix were calculated
Comparative study of experimental data and theoretical results	Nano laser dry cleaning model	Nano-dry laser cleaning cannot be explained purely on the basis of an expansion model
Comparative study of experimental data and theoretical results	One-dimensional model considering temperature-dependent absorption coefficient and multi-pulse damage based on plastic deformation accumulation	Experimental damage threshold is consistent with the theory

Table 2. Research history of laser derusting theory

Laser cleaning technology	Instruction	Schematic diagram
Dry laser cleaning	Advantages：no need to pretreat the matrix，more convenientDisadvantages：the impact is small，and the removal effect of the stain is not ideal
Steam laser cleaning	Advantages：the impact force is much stronger than dry cleaningDisadvantages：liquid film composition ratio is not accurate resulting in poor cleaning effect
Laser shock wave cleaning	Advantages：high cleaning accuracy Disadvantages：cleaning conditions are difficult to control，affecting the cleaning effect

Table 3. Typical laser cleaning techniques

Model

Performance（power）

Application

Advantages

Nankai University electro-opticalQ-switching

Input power：3500 W

Input voltage：AC 220 V

Paint layer and thinner metal etching layer

Cleaning efficiency is improved by using a seven-joint mechanical arm combined with the platform

Nankai University acousto-opticQ-modulated

Laser wavelength：1064 nm Laser output power：CW 100 W（QCW 40W）