The Formation of Contrasting Nanofilms on a Metal Surface for Bar Coding

Abstract:

Laser marking is a universal method of applying information to the products surface. Colored oxide films form on metal surface during a thermal exposure. The degree of steel heating influences the film thickness. Corrosion-resistant steel AISI 304 samples were laser-marked with a MiniMarker 2-20A4 precision laser complex. The contrast of the barcodes on a metal area depends on the surface roughness and the chemical composition of the steel. Fe₂O₃, Fe₃O₄ oxides forms the greatest contrast. RGB indicators are used to assess contrast. Study results may be applicable to increase the QR code contrast thereby contributing to the improvement of laser marking technology while preserving economic efficiency.

• Periodical: Key Engineering Materials (Volume 854)
• Pages: 97-102
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.854.97
• Online since: July 2020
• Authors: Darina A. Konchus*, Aleksei V. Sivenkov
• Keywords: Contrast Assessment, Laser Marking, Oxide Nanofilms

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