Possessing special wetting properties, superhydrophobic surfaces on 304 SS substrates have great application prospects in various fields. However, due to the excellent corrosion resistance of 304 SS, currently, only strong oxidants can directly process stainless steel to obtain desired structures, which poses great threats to human health and the environment. In addition, other methods, such as electrical discharge machining and coating, are relatively expensive, and the prepared surfaces tend to be fragile. Therefore, it is of great significance to find an environmentally friendly and highly efficient method to fabricate superhydrophobic surfaces on 304 SS substrates. Electrochemical etching can generate microstructures on metals with neutral electrolytes; nevertheless, there has been no report on fabricating superhydrophobic 304 SS surfaces by electrochemical etching with neutral electrolytes owing to the excellent corrosion resistance of 304 SS. In this paper, wire electrochemical etching with neutral sodium nitrate is adopted for the first time to fabricate superhydrophobic surfaces on 304 SS substrates. Based on theoretical analysis, superhydrophobic 304 SS surfaces with contact angles of ∼ 166° and roll-off angles of ∼ 10° are successfully fabricated. The prepared superhydrophobic 304 SS surfaces show excellent anti-icing performance and self-cleaning properties, which may greatly facilitate the application of 304 SS in extreme conditions.

304 SS 基材上的超疏水表面具有特殊的润湿性能，在各个领域都有很大的应用前景。然而，由于304 SS优异的耐腐蚀性能，目前只有强氧化剂才能直接加工不锈钢以获得所需的结构，这对人类健康和环境构成了极大的威胁。此外，其他方法，例如放电加工和涂层，相对昂贵，并且制备的表面往往易碎。因此，寻找一种环保高效的方法在 304 SS 基底上制备超疏水表面具有重要意义。电化学蚀刻可以在具有中性电解质的金属上产生微结构；尽管如此，由于 304 SS 具有优异的耐腐蚀性，因此没有关于通过中性电解质电化学蚀刻制造超疏水 304 SS 表面的报道。在本文中，首次采用中性硝酸钠导线电化学蚀刻在 304 SS 基材上制备超疏水表面。基于理论分析，成功制造了接触角为~166°和滚降角为~10°的超疏水304 SS表面。制备的超疏水 304 SS 表面显示出优异的防冰性能和自清洁性能，这可能极大地促进 304 SS 在极端条件下的应用。首次采用中性硝酸钠金属丝电化学蚀刻在 304 SS 基材上制备超疏水表面。基于理论分析，成功制造了接触角为~166°和滚降角为~10°的超疏水304 SS表面。制备的超疏水 304 SS 表面显示出优异的防冰性能和自清洁性能，这可能极大地促进 304 SS 在极端条件下的应用。首次采用中性硝酸钠金属丝电化学蚀刻在 304 SS 基材上制备超疏水表面。基于理论分析，成功制造了接触角为~166°和滚降角为~10°的超疏水304 SS表面。制备的超疏水 304 SS 表面显示出优异的防冰性能和自清洁性能，这可能极大地促进 304 SS 在极端条件下的应用。