60 Years' marine corrosion of aluminium alloy 24S (2024) from an historic aircraft wreck site: implications for conservation

被引：0

作者：

Rocca, E. ^{[1
]}

Tardelli, J. ^{[1
]}

Mirambet, F. ^{[2
,3
]}

机构：

[1] Univ Lorraine, Inst Jean Lamour, BP 50840,Campus Artem,2 Allee Andre Guinier, F-54000 Nancy, France

[2] Ctr Rech & Restaurat Musees France C2RMF, Paris, France

[3] PSL Res Univ, CNRS, Inst Rech Chim Paris IRCP, Chimie ParisTech, Paris, France

来源：

CORROSION ENGINEERING SCIENCE AND TECHNOLOGY | 2021年 / 56卷 / 03期

关键词：

Aluminium artefact; dealloying; EIS; intermetallic phase; ACID; LEAD;

D O I：

10.1080/1478422X.2020.1859708

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Aluminium alloys forming the remnants of Lockheed P38 of Antoine de Saint-Exupery was identified as the 24S aluminium alloy developed in 1930s. After 60 years in sea water, thick corrosion layers composed of aluminium hydroxide, copper salts and nanometre pure copper particles. In addition, the ancient aluminium alloy has undergone a very important intergranular corrosion. After the synthesis of Al2Cu, Al7Cu2Fe and Al2CuMg intermetallic phases, the study of their electrochemical behaviour in NaCl medium explains the significant presence of pure copper, because all the phases undergo a dealloying process. Electrochemical impedance spectroscopy measurements show that the kinetic of dealloying is constant versus immersion time, and is not limited by diffusion which explains the complete formation of copper sponge in NaCl medium in the conditions of long-term corrosion on aluminium artefacts.

引用

页码：279 / 288

页数：10