Laser & Optoelectronics Progress, Volume. 61, Issue 5, 0500006(2024)
Research Progress of Laser Derusting Technology in Coating Pretreatment
Figures & Tables(12)
![Three adhesion forces between surface particles and substrate. (a) Van der Waals force; (b) capillary condensing force; (c) electrostatic double layer force [11]](/Images/icon/loading.gif){kind=icon}
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]
Fig. 4. Lapping effect diagram. (a) Schematic diagram of surface covering; (b) schematic diagram of spot lap rate
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
Table 1. Advantages and disadvantages of derusting technology
View tableTable 1. Advantages and disadvantages of derusting technology
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 2. Research history of laser derusting theory
View tableTable 2. Research history of laser derusting theory
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 3. Typical laser cleaning techniques
View tableTable 3. Typical laser cleaning techniques
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 4. Laser derusting equipment combined with related technologies
View tableTable 4. Laser derusting equipment combined with related technologies
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） Paint layer and thinner metal etching layer Closed cavity transmission of laser using energy transmitting fiber makes the incident light flexible and convenient for manual operation CCD machine vision rust removal system Laser wavelength：1064 nm Maximum average output power：100 W Rust layer of most substrates Combined with the vision system，the rust area can be intelligently identified and fixed-point removal can be realized
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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
Paper Information
Category: Reviews
Received: Jan. 4, 2023
Accepted: Feb. 22, 2023
Published Online: Feb. 26, 2024
The Author Email: Li Yin (liyin@shmtu.edu.cn)
CSTR:32186.14.LOP223299
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