Effect of Ultrasonic Shot Peening on the Corrosion Resistance and Antibacterial Properties of 304 Cu-Bearing Stainless Steel

IF 3.9 2区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Acta Metallurgica Sinica-English Letters Pub Date : 2025-04-16 DOI:10.1007/s40195-025-01855-9

Yuntian Lou, Shengyu He, Xudong Chen, Weiwei Chang, Hao Zhang, Jingzhi Yang, Hongchang Qian, Dawei Zhang

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Abstract

This study investigated the effects of ultrasonic shot peening (USSP) treatment at various durations on the corrosion resistance and antibacterial properties of 304 Cu-bearing stainless steel (304-Cu SS). The results showed that USSP treatment refined the surface microstructure, enhancing hardness, wear resistance, and dislocation density. With longer treatment time, grain size decreased, and martensitic phase formation was promoted, improving mechanical properties. However, extended USSP treatment induced internal stresses, negatively affecting corrosion resistance. Cu addition to 304 stainless steel resulted in large Cu-rich phases, leading to uneven elemental distribution and reduced corrosion resistance. USSP effectively fragmented these phases, promoting a uniform distribution and enhancing the formation of a dense passive film, with the 304-Cu-5 min coupon showing the best corrosion performance. Cu also significantly improved antibacterial properties, demonstrating strong activity against Eescherichia coli and Staphylococcus aureus after 72 h. Overall, USSP treatment optimized both corrosion resistance and antibacterial performance, with the 5 min treatment providing the best balance.

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超声波喷丸强化对304含铜不锈钢耐蚀性和抗菌性能的影响

研究了超声喷丸（USSP）处理不同时间对304含铜不锈钢（304- cu SS）耐蚀性和抗菌性能的影响。结果表明，USSP处理细化了表面组织，提高了硬度、耐磨性和位错密度。随着处理时间的延长，晶粒尺寸减小，促进了马氏体相的形成，力学性能得到改善。然而，延长USSP处理会引起内应力，对耐腐蚀性产生负面影响。在304不锈钢中加入Cu会导致大量富Cu相，导致元素分布不均匀，耐蚀性降低。USSP有效地破碎了这些相，促进了这些相的均匀分布，并促进了致密钝化膜的形成，其中304-Cu-5 min合金的腐蚀性能最好。铜也显著提高了抗菌性能，在72 h后对大肠杆菌和金黄色葡萄球菌表现出较强的抗菌活性。总体而言，USSP处理优化了抗腐蚀性能和抗菌性能，其中处理5 min达到最佳平衡。

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来源期刊

Acta Metallurgica Sinica-English Letters METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

6.60

自引率

14.30%

发文量

122

审稿时长

2 months

期刊介绍： This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.