Computational and Experimental Insights into the Role of Acidic Molecules on the Corrosion Behavior on 7A46 Aluminum Alloy-Reference-Cited by-同舟云学术

Computational and Experimental Insights into the Role of Acidic Molecules on the Corrosion Behavior on 7A46 Aluminum Alloy

Published:2021-04-01 Issue:4 Volume:21 Page:2221-2233
ISSN:1533-4880
Container-title:Journal of Nanoscience and Nanotechnology
language:en
Short-container-title:j nanosci nanotechnol

Author:

Liu Yaru¹,Pan Qinglin¹,Wang Xiangdong²,Ji Ye¹,Liu Qicheng³,Huang Zhiqi⁴,Peng Zhuowei⁵,Wang andWeiyi¹

Affiliation:

1. School of Materials Science and Engineering, Central South University, Changsha 410083, China

2. Manufacturing Center, China Railway Rolling Stock Corporation (CRRC) Times Electric Co., Ltd., Zhuzhou 412001, China

3. Hunan Provincial Key Laboratory of Flexible Electronic Materials Genome Engineering, Changsha University of Science and Technology, Changsha 410114, China

4. Foshan Sanshui Feng Aluminum Co. Ltd., Foshan 528000, China

5. Guangdong Haomei New Material Co. Ltd., Guangdong 510000, China

Abstract

The corrosion mechanisms for different corrosive media on the aged 7A46 aluminum alloy were systematically investigated at nanoscale level. The combination of empirical intergranular and exfoliation corrosion behavior was employed, and coupled with first-principles calculations. Results revealed that the dispersed distribution of matrix precipitates (MPs) leads to the enhancement of the corrosion resistance pre-ageing (PA) followed by double-ageing (PA-DA) alloy. The deepest corrosion depth of PA-DA alloy was in hydrochloric acid, and the calculation result demonstrates that the passivation effect in combination with the accumulation of corrosion products in nitric acid protect the PA-DA alloy from further corrosion.

Publisher

American Scientific Publishers

Subject

Condensed Matter Physics,General Materials Science,Biomedical Engineering,General Chemistry,Bioengineering