Effective corrosion protection of aluminum alloy AA2024-T3 with novel thin nanostructured oxide coating

被引：33

作者：

Merisalu, Maido ^{[1
]}

Aarik, Lauri ^{[1
]}

Kozlova, Jekaterina ^{[1
]}

Mandar, Hugo ^{[1
]}

Tarre, Aivar ^{[1
]}

Sammelselg, Vaino ^{[1
]}

机构：

[1] Univ Tartu, Inst Phys, W Ostwald Str 1, EE-50411 Tartu, Estonia

来源：

SURFACE & COATINGS TECHNOLOGY | 2021年 / 411卷

关键词：

Aluminum alloy; Pitting corrosion; Nanostructured protective coating; Amorphous structure; Atomic layer deposition; Surface engineering; ATOMIC LAYER DEPOSITION; CHROMATE CONVERSION COATINGS; LOCALIZED CORROSION; AL; 2024-T3; S PHASE; FILMS; RESISTANCE; ACID; MICROSTRUCTURE; PARTICLES;

D O I：

10.1016/j.surfcoat.2021.126993

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Effective corrosion protection via a thin ceramic coating on an Al-alloy AA2024-T3 is demonstrated. The preparation of the coating consists of two steps. First, with a special anodizing process, a chemically homogeneous thin base layer is formed on the substrate. Then, the nanoscale pores in the base layer are sealed, and the entire surface is covered with a chemically resistant Al2O3/TiO2 nanolaminate using atomic layer deposition. The sample surface is thoroughly characterized, including linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) and testing by long-term immersion in a salt solution. The coating withstands LSV up to 10 V versus saturated calomel electrode (SCE) and salt solution immersion of 7152 h (298 days).

引用

页数：13

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