This paper reports on the corrosion behavior of Titanium Grade 2 when subjected to non-contact laser functionalization. Direct Laser Interference Lithography (DLIL) was used to create periodic topography with two different surface patterns on pre-modified titanium. Corrosion resistance was measured in physiological saline at 37 °C. Electrochemical Impedance Spectroscopy data (EIS) and potentiodynamic polarization curves were correlated with the characteristics of the passive films through analysis of the topography, chemical composition, and thickness of oxides formed on the titanium after surface modifications. The corrosion tests showed that laser-textured surfaces have a beneficial impact on titanium corrosion resistance in a physiological saline solution 0.9% NaCl. Moreover, the passive layer on DLIL-modified samples is more stable and less susceptible to growth in the corrosive environment. The results highlight the local interaction of DLIL treatment of the titanium surface after it had been shot-peened and acid-etched. The improved corrosion resistance in DLIL samples derives mainly from changes in the surface topography, chemical composition, and thickness of oxide films obtained after laser processing.

本文报道了2级钛合金在进行非接触式激光功能化处理时的腐蚀行为。直接激光干涉平版印刷术（DLIL）用于在预改性钛上创建具有两种不同表面图案的周期性形貌。在37°C的生理盐水中测量了耐腐蚀性。通过分析表面修饰后在钛上形成的氧化物的形貌，化学组成和厚度，将电化学阻抗谱数据（EIS）和电位动力学极化曲线与钝化膜的特性相关联。腐蚀测试表明，在0.9％NaCl的生理盐水溶液中，具有激光纹理的表面对钛的耐蚀性具有有益的影响。而且，DLIL改性样品上的钝化层更稳定，在腐蚀环境下不易生长。结果突出了DLIL处理的钛表面在喷丸和酸蚀后的局部相互作用。DLIL样品中改善的耐蚀性主要来自激光加工后获得的表面形貌，化学成分和氧化膜厚度的变化。