Inhibition mechanism of NaF on WE43 Mg alloy in NaCl solution

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-02-01 DOI:10.1016/S1003-6326(24)66692-6

Yun-tian YANG , Yu-xin ZHOU , Xiao-peng LU , Ji-rui MA , Jun-jie YANG , Fu-hui WANG

引用次数: 0

Abstract

The influence of NaF on the microstructure, composition and corrosion performance of WE43 Mg alloy in 3.5 wt.% NaCl solution was systematically investigated by means of SEM, TEM, EPMA, XRD, XPS and electrochemical measurements. It was proved that NaF is an effective inhibitor for WE43 Mg alloy and the highest inhibition efficiency is 92.6% at its concentration of 40 mmol/L in neutral NaCl solution. The dissolution of WE43 alloy is inhibited by formation and deposition of a dense and protective double-layered corrosion film by chemical reaction between corrosion inhibitor and dissolved Mg²⁺. The microstructure and composition of this double-layered corrosion film were investigated by FIB and TEM. The outer layer of the corrosion film is found to be composed of NaMgF₃, MgF₂ and MgO, while the inner layer mainly consists of MgO and MgF₂.

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.