Manufacturing Technology 2019, 19(4):624-631 | DOI: 10.21062/ujep/345.2019/a/1213-2489/MT/19/4/624

Influence of Heat Treatment Regime on Corrosion Resistance of Clad Aluminium Alloy

Sylvia Kusmierczak1, Frantiska Peslova2, Natasa Naprstkova1
1 Faculty of Mechanical Engineering, J. E. Purkyne University in Usti nad Labem. Pasteurova 3334/7, 400 01 Usti nad Labem. Czech Republic
2 Faculty of Industrial Technologies, Alexander Dubček University of Trenčín. Ivana Krasku 491/30 020 01 Púchov

Al-Cu-Mg based alloys are often used in the automotive industry. There are characterized by high strength characteristics but poor corrosion resistance, which appears to be problematic in this sector. The manufactured blanks of these alloys may be protected by some of the barrier protection methods, including cladding. Semi-finished products made of these methods can be protected against corrosion by a thin layer of aluminium oxides - called clad Durals. The surface layer creates a stable and durable Al2O3 layer, which provides corrosion resistance, which leads to an extended service life of the piece.
However, this type of protection is adversely affected by the effect of copper diffusion, which is dependent on the heat treatment mode of the alloy. Temperature and temperature hold are the main factors influencing the diffusion process. In the solution annealing of aluminium alloys, the temperature is in the range of (470-500) ° C, resulting in intense diffusion processes at the inter phases interfacial.
The paper deals with the analysis of the influence of the heat treatment regime on the corrosion resistance of Al2024 alloy sheets (AlCu4Mg1 type alloy) provided with an Al1050 alloy clad coating on both sides in a corrosive salt mist environment in accordance with EN ISO 9227, which is supposed to have a positive effect on extending the service life of a car component.

Keywords: aluminium alloys, cladding, heat treatment, corrosion resistance, REM
Grants and funding:

SG 48207 15 2023-48 01 at UJEP.
Slovak Grant Agency KEGA 007TnUAD - 4/2017, VEGA grant No. 1/0649/17, VEGA grant No. 1/0589/17.

Published: August 1, 2019  Show citation

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Kusmierczak S, Peslova F, Naprstkova N. Influence of Heat Treatment Regime on Corrosion Resistance of Clad Aluminium Alloy. Manufacturing Technology. 2019;19(4):624-631. doi: 10.21062/ujep/345.2019/a/1213-2489/MT/19/4/624.
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