Effects of laser patterning and heat treatment on hydrophobicity, wear, and corrosion resistance of 316L stainless steel
摘要
Many methods have been proposed to enhance the surface wettability of stainless steel to improve its wear and corrosion-resistant properties. However, these methods are often expensive and time-consuming. Accordingly, this study presents a straightforward approach for improving the surface wettability of 316L stainless steel using UV laser patterning at a wavelength of 355 nm, followed by heat treatment. The effects of the laser power (0.3–1.0 W), scanning speed (100–900 mm/s), heat treatment temperature (100–200 °C), and heat treatment duration (0–12 h) on the surface roughness, wettability, wear resistance, and corrosion resistance are systematically explored. The experimental results show that laser treatment at a scanning speed of 500 mm/s followed by heat treatment at 150 °C for 6 h produced a hydrophobic surface with a contact angle of 138.0°. The wear resistance of the sample was significantly improved, with a reduction in the friction coefficient from 0.075 to 0.059. The electrochemical tests showed that the hydrophobic surface reduced the corrosion current from 7.89E − 8 to 5.11E − 8 A/cm2. Overall, the optimal laser modification (1 W- 500 mm/s) and post-heat treatment (150 °C) provide an effective approach for enhancing the hydrophobicity, wear resistance, and corrosion resistance of 316L stainless steel, thereby offering an efficient alternative to existing surface modification methods.