Corrosion behavior of AlSi7Mg0.6 produced by selective laser melting: A comparative approach

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-06-02 DOI:10.1016/j.jallcom.2025.181361

Rafael Emil Klumpp , Sajjad Akbarzadeh , Thomas Kairet , Védi Ölmez , Maurice Gonon , Alexandre Mégret , Fabienne Delaunois , Marie-Georges Olivier

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引用次数: 0

Abstract

Additive manufacturing (AM) has revolutionized metal manufacturing. Indeed, AM of lightweight, mechanically resistant aluminum alloys is becoming increasingly popular in manufacturing. However, corrosion is a threat to aluminum alloy parts. AM produces a different microstructure which could be correlated with its corrosion resistance. In this study, the global and localized corrosion behavior of additive-manufactured AlSi7Mg0.6 is investigated. The corrosion behavior was evaluated by immersion tests in sodium chloride solution (3.5 % NaCl) and monitored by global electrochemical techniques, such as electrochemical impedance spectroscopy (EIS), potentiodynamic anodic polarization, and local electrochemical techniques such as the scanning vibrating electrode technique (SVET). The microstructure was analyzed and characterized by Electron Backscatter Diffraction (EBSD) and X-Ray Diffraction (XRD). The results indicate that the additive manufactured AlSi7Mg0.6 alloy exhibits superior corrosion behavior compared to the as-cast AlSi7Mg0.7alloy, and this is attributed to the reinforcement of the passive alumina layer by a residual Mg/Si layer formed at the grain boundaries during corrosive environment exposition.

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选择性激光熔化制备AlSi7Mg0.6腐蚀行为的比较研究

增材制造（AM）已经彻底改变了金属制造业。事实上，轻质、耐机械的铝合金增材制造在制造业中越来越受欢迎。然而，腐蚀对铝合金零件是一个威胁。增材制造出不同的微观结构，这可能与它的耐腐蚀性有关。本文研究了增材制造AlSi7Mg0.6的整体和局部腐蚀行为。通过在氯化钠溶液（3.5% NaCl）中浸泡测试来评估腐蚀行为，并通过电化学阻抗谱（EIS）、动电位阳极极化和扫描振动电极技术（SVET）等局部电化学技术来监测腐蚀行为。采用电子背散射衍射（EBSD）和x射线衍射（XRD）对其微观结构进行了分析和表征。结果表明，与铸态alsi7mg0.7合金相比，添加剂制备的AlSi7Mg0.6合金表现出更好的腐蚀性能，这是由于在腐蚀环境中，在晶界处形成残留的Mg/Si层强化了被动氧化铝层。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.