Abstract Two types of diamond-like carbon (DLC) thin films, hydrogenated amorphous carbon (a-C:H) and super-hard tetrahedral amorphous carbon (ta-C), were irradiated with femtosecond laser pulses, and the corrosion resistance of the DLC films with laser-induced periodic surface structure (LIPSS) and modified to nanocrystalline graphite (nc-G) was electrochemically evaluated from anodic polarization measurements. The polarization curve for a glassy carbon (GC) plate, which is a type of nc-G, was measured for comparison. The polarization curve for stainless steel with LIPSS was also measured, and it was confirmed that LIPSS increased the surface area of the irradiated part, which resulted in an increased apparent corrosion current density. Polarization curve measurements for irradiated DLC indicated that the corrosion current density was reduced, despite the effect of an increased surface area by the formation of LIPSS, and the polarization curves tended to approach those for GC plates. Therefore, the irradiated surface layer of DLC is modified to nc-G, which results in excellent corrosion resistance similar to that of GC.

中文翻译：

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具有激光诱导石墨化周期性表面结构的 DLC 涂层的腐蚀性能

摘要 飞秒激光脉冲辐照氢化非晶碳(aC:H)和超硬四面体非晶碳(ta-C)两种类金刚石碳(DLC)薄膜，研究类金刚石薄膜的耐腐蚀性能。通过阳极极化测量对具有激光诱导周期性表面结构 (LIPSS) 并改性为纳米晶石墨 (nc-G) 的材料进行电化学评估。测量玻璃碳 (GC) 板（一种 nc-G）的极化曲线以进行比较。还测量了具有 LIPSS 的不锈钢的极化曲线，证实 LIPSS 增加了辐照部分的表面积，从而导致表观腐蚀电流密度增加。辐照 DLC 的极化曲线测量表明腐蚀电流密度降低，尽管 LIPSS 的形成会增加表面积的影响，但极化曲线趋于接近 GC 板的极化曲线。因此，DLC 的辐照表面层被改性为 nc-G，这导致了与 GC 类似的优异耐腐蚀性。