数字农科院2.0

In-depth analysis of superhydrophobicity and corrosion resistance enhancing mechanism by laser-textured brass surface

文献类型： 外文期刊

作者： Ji Qi;Wei Zhang;Mingyou Wang;Chao Jiang;Kai Zhao;Huaqiang Zhang;Hongyu Zheng

作者机构：

关键词： Electrochemical testing;Hierarchical micro/nano structures;Picosecond laser ablating;Superhydrophobicity

期刊名称： Surfaces and Interfaces

ISSN： 2468-0230

年卷期： 2025 年 72 卷

页码：

收录情况： SCIE（2025版）

摘要： Brass corrosion causes equipment failure and environmental pollution and remains a technical challenge. A superhydrophobic surface reduces liquid-surface contact area and thus enhances corrosion resistance. However, the long-term durability of laser-induced superhydrophobic surfaces on brass, as well as the lack of understanding on their structure–function relationships, remains a technical challenge that limits their real-world corrosion protection applications, particularly in marine or dynamically corrosive environments. In this study, a novel surface treatment combining picosecond laser ablation and subsequent heating at 150 °C for 12 h was presented to fabricate micro/nano structures on brass. This process yielded a maximum water contact (CA) angle of 154°, achieving a stable superhydrophobic state. Furthermore, Lower scanning speeds and smaller intervals during laser processing were found to reduce brass reflectivity and improve laser energy absorption, contributing to more efficient structure formation. Laser confocal microscopy was utilized to assess the surface morphology and its influence on the superhydrophobicity. Potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS) and neutral salt spray (NSS) tests verified that the laser-textured brass with the post-heating treatment exhibited significantly improved corrosion resistance. Analytical results showed that the air film on the laser-textured post-heating acts as a barrier to electrolyte penetration, and creates additional resistance for enhancing the corrosion resistance. The combined approach of laser-texturing and post-heating provides an efficient and novel strategy for the corrosion protection of brass surfaces.

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