Effects of Cu-content and passivation treatment on the corrosion resistance of Al0.3CuxCoCrFeNi high-entropy alloys

被引：37

作者：

Chen, Xudong ^{[1
,2
]}

Qian, Hongchang ^{[1
,2
]}

Lou, Yuntian ^{[1
,2
]}

Yang, Bin ^{[3
]}

Cui, Tianyu ^{[1
]}

Zhang, Dawei ^{[1
,2
]}

机构：

[1] Univ Sci & Technol Beijing, Natl Mat Corros & Protect Data Ctr, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, BRI Southeast Asia Network Corros & Protect MOE, Shunde Grad Sch, Foshan 528000, Guangdong, Peoples R China

[3] Univ Sci & Technol Beijing, Collaborat Innovat Ctr Steel Technol, Beijing 100083, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 920卷

基金：

中国博士后科学基金;

关键词：

High entropy alloys; Passivation process; Passive film; Corrosion resistance; DUPLEX STAINLESS-STEEL; MECHANICAL-PROPERTIES; BEHAVIOR; MICROSTRUCTURE; EIS; ZN; AL;

D O I：

10.1016/j.jallcom.2022.165956

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This work investigated the effects of Cu-content and passivation treatment on the corrosion resistance of Al0.3CuxCoCrFeNi (x = 0.3, 0.4, 0.5, 0.6) high entropy alloys. With increased Cu content, the Al, Cu-riched precipitates in the Al0.3CuxCoCrFeNi alloys emerged gradually, resulting in the decreased corrosion re-sistance and the weakening of the passive film. The passivation treatment in 30 wt% HNO3 and 1 wt% NaOH aqueous solutions promotes the Cr3+ content in the passive film of Al0.3Cu0.3CoCrFeNi and reduces the probability of pitting initiation, which substantially increased the corrosion resistance of the alloy. However, this treatment became less effective as the continuously intensified Al, Cu-riched precipitates which damaged the formation of homogeneous passive film and caused more serious galvanic corrosion. (C) 2022 Elsevier B.V. All rights reserved.

引用

页数：11

共 44 条

[1] Corrosion mechanisms of steel concrete moulds in contact with a demoulding agent studied by EIS and XPS [J].