The impact of coated and non-coated to the different materials surfaces

Harun, Muhammad Amin and Abdul Majid, Zafri Azran and Zakaria, Zairul Azrul (2025) The impact of coated and non-coated to the different materials surfaces. In: SMART TECHNOLOGY AND SUSTAINABILITY INTERNATIONAL CONFERENCE, 6-7 October 2025, UNIVERSITI KEBANGSAAN MALAYSIA.

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Abstract

The thermal radiation properties of metals play a crucial role in industrial and scientific applications, where surface characteristics such as reflectivity and emissivity significantly influence performance. This study investigates the effect of a flat black coating on the thermal behavior of three widely used metals which is copper, aluminum, and stainless steel through a comparative analysis of coated and uncoated specimens. Experiments were conducted under controlled indoor conditions using a flat plate solar collector exposed to artificial solar radiation (450 W/m²). Temperature measurements were recorded using an 8-channel data logger, and thermal responses were analyzed during both charging (300 s) and discharging (300 s) phases. Results indicate that the flat black coating significantly enhances thermal radiation efficiency across all metals, with aluminum exhibiting the most substantial improvement due to its high native reflectivity. Copper, while maintaining superior thermal conductivity, showed notable gains in emissivity, whereas stainless steel demonstrated more modest improvements due to its alloy composition. The findings highlight the potential of surface treatments in optimizing thermal management for applications such as solar energy systems, aerospace engineering, and construction. This study provides empirical insights into material selection for scenarios requiring enhanced radiative heat transfer and suggests further research into long-term coating durability under operational conditions.

Item Type:	Proceeding Paper (Invited Papers)
Uncontrolled Keywords:	thermal radiation, flat black coating, emissivity enhancement, copper, aluminum, stainless steel.
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ807 Renewable energy sources
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Allied Health Sciences > Department of Diagnostic Imaging and Radiotherapy Kulliyyah of Allied Health Sciences
Depositing User:	Dr. Zafri Azran Abdul Majid
Date Deposited:	10 Dec 2025 09:51
Last Modified:	10 Dec 2025 09:51
Queue Number:	2025-12-Q484
URI:	http://irep.iium.edu.my/id/eprint/125104

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