Laser cleaning of rusted surfaces has broad applications in marine ship industrial manufacturing. An ultraviolet nanosecond laser cleaning method was proposed to strip the rust layer from the surface of the AH36 steel to reduce surface roughness and increase corrosion resistance. Multi-pulse laser ablation was established to determine the single-pulse threshold fluence and pulse incubation coefficient of the substrate. Based on the experimental results, the surface cleaned at a fluence of 3.17 J/cm2 has the best combination of corrosion resistance and roughness. The chemical composition and microstructure of the sample surface were measured via x-ray photoelectron spectroscopy and scanning electron microscopy. Moreover, the corrosion resistance of the samples was evaluated with electrochemical measuring. The results showed that the laser-cleaned surface has approximately five times greater corrosion resistance than the rusted surface. The proposed method is an environmentally friendly approach that effectively increases corrosion resistance, which may subsequently extend the service lifetime of a ship. Hence, this study may contribute to the development of laser manufacturing.

中文翻译：

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AH36钢除锈用紫外激光清洗及表面表征

生锈表面的激光清洁在船舶工业制造中具有广泛的应用。提出了一种紫外纳秒激光清洗方法，去除AH36钢表面的锈层，降低表面粗糙度，提高抗腐蚀性能。建立了多脉冲激光烧蚀法来确定基底的单脉冲阈值通量和脉冲孵化系数。根据实验结果，以 3.17 J/cm2 的能量密度清洁的表面具有最佳的耐腐蚀性和粗糙度组合。通过X射线光电子能谱和扫描电子显微镜测量样品表面的化学成分和微观结构。此外，通过电化学测量评估样品的耐腐蚀性。结果表明，激光清洗过的表面比生锈的表面具有大约五倍的耐腐蚀性。所提出的方法是一种环境友好的方法，可有效提高耐腐蚀性，从而可以延长船舶的使用寿命。因此，这项研究可能有助于激光制造的发展。