Improved Thermal Stability of Al-Si Alloy Coated Steel Sheet with Cr Thin Film Deposition

Author:

Kim Jae-Hyeon1,Lee Jung-Ha2,Lee Seung-Beop2,Kim Sung-Jin3ORCID,Oh Min-Suk1ORCID

Affiliation:

1. Jeonbuk National University, Division of Advanced Materials Engineering And Research Center For Advanced Materials Development, Jeonju, Republic of Korea

2. Jeonbuk National University, School of International Engineering And Science, Jeonju, Republic of Korea

3. Sunchon National University, Department of Advanced Materials Engineering, Sunchon, Republic of Korea

Abstract

We investigated the effect of Cr thin film deposition on the thermal stability and corrosion resistance of hot-dip aluminized steel. A high-quality Cr thin film was deposited on the surface of the Al-9 wt. % Si-coated steel sheets by physical vapor deposition. When the Al-Si coated steel sheets were exposed to a high temperature of 500℃, Fe from the steel substrate diffused into the Al-Si coating layer resulting in discoloration. However, the highly heat-resistant Cr thin film deposited on the Al-Si coating prevented diffusion and surface exposure of Fe, improving the heat and corrosion resistances of the Al-Si alloy coated steel sheet.

Publisher

Polish Academy of Sciences Chancellery

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