Enhanced corrosion resistance of aluminum 6061 alloy using Ti-based thin films and plasma nitriding

Q3 Materials Science

JCIS open Pub Date : 2025-04-28 DOI:10.1016/j.jciso.2025.100139

Margono , Djarot B. Darmadi , Femiana Gapsari , Teguh Dwi Widodo , Bayu Mahdi Kartika

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Abstract

The corrosion resistance of aluminum alloys is a critical factor limiting their application in aggressive environments, particularly those containing chloride ions. Aluminum 6061, despite its high strength-to-weight ratio, suffers from localized corrosion in such conditions. In this study, Ti, Ti-Ni, and Ti-Ni-N thin films were deposited on aluminum 6061 alloy using the DC sputtering method, followed by plasma nitriding for the Ti-Ni-N film. The results showed that the Ti-Ni film exhibited the best corrosion resistance of 3.64 × 10⁻⁴ mm/year, with the lowest i_corr of 2.80 × 10⁻⁴ A/cm² and the highest protection efficiency, due to the formation of a stable passive layer. The Ti-Ni-N film also demonstrated enhanced hardness of 392.4 HV, though with slightly higher surface roughness of 5.76 μm. This research contributes to the development of more durable coatings for aluminum alloys, providing improved corrosion resistance in chloride-rich environments.

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采用ti基薄膜和等离子渗氮增强6061铝合金的耐蚀性

铝合金的耐腐蚀性是限制其在腐蚀性环境中应用的关键因素，特别是在含有氯离子的环境中。尽管铝6061的强度重量比很高，但在这种条件下会受到局部腐蚀。本研究采用直流溅射法在6061铝合金上沉积Ti、Ti- ni和Ti- ni - n薄膜，然后对Ti- ni - n薄膜进行等离子渗氮处理。结果表明，Ti-Ni膜的耐蚀性能最佳，为3.64 × 10−4 mm/年，icorr最低，为2.80 × 10−4 A/cm2，由于形成了稳定的钝化层，其防护效率最高。Ti-Ni-N膜的硬度达到392.4 HV，但表面粗糙度略高，为5.76 μm。这项研究有助于开发更耐用的铝合金涂层，在富含氯化物的环境中提供更好的耐腐蚀性。

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