Abstract
Paint removal is an important part of ship and marine engineering ship processing. Aluminum alloy is extremely vital in the field of shipbuilding, due to its high strength and strong corrosion resistance ability. Therefore, the cleaning quality of aluminum alloy is a key factor in the service life of the ship. In this paper, the research about continuous wave (CW) laser cleaning technique is employed to clean the paint on the substrate of aluminum alloy. The track width and depth of laser ablated craters are measured to study the removal rates. The analysis of CW laser cleaning is performed to explain the removal process that is theoretically based on the cleaning model, temperature, and the thermal stress profiles. The parametric and morphological studies indicate that the cleaned surface of aluminum alloy could be achieved at proper parameters. The performance of the laser cleaned surface at an intensity of 11.9 W/cm2 has better corrosion resistance and surface roughness. Therefore, the experimental results were considered to provide more completed and further understandings of interaction mechanism between the laser and paint on the aluminum alloy substrate, which could make some contributions to the development of laser manufacturing.
Highlights
Corrosion is a serious problem for ships and offshore structures operating in seawater
As a result of the continuous wave (CW) laser ablation the paint layer, it results in a significant dominance of the optical dissociation process during thermal dissociation [26]
Investigation regarding the CW laser cleaning the aluminum alloy substrate covered with the paints is carried out
Summary
Corrosion is a serious problem for ships and offshore structures operating in seawater. As the laser cleaned surface has good corrosion resistance [8,9,10], the performance and the durability of the ship can be enhanced by the laser cleaning the paint layer of the surface thoroughly. When a laser beam irradiates the surface of the paint layer, it can remove the coatings, and affect the performance of the cleaned surface, just like the surface roughness, hardness, and corrosion resistance. The performance of laser cleaned surface, especially the roughness, hardness, and corrosion resistance are discussed in detail through the experiments This method can promote environmentally friendly, cost-effective, and fast processing CW laser cleaning in industrial applications
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