Influence of laser colour marking on the corrosion properties of low alloyed Ti

Kosec, Tadeja (author), Legat, Andraž (author), Kovač, Janez (author), Klobčar, Damjan (author)

In the field of surface treatment, laser colour marking can be used to produce coloured marks on the surfaces of metals. Laser colour markings can be applied to various materials, but on titanium alloys a wide spectra of vivid colours can be achieved. This study presents an analysis of the corrosion properties of laser treated surfaces that were exposed to aggressive environments. Different samples were prepared with laser light of various power intensities and processing speeds. The samples were prepared on low alloyed Ti. Electrochemical, spectroscopic and microstructural analyses were conducted in order to study the properties of the laser treated surfaces. Corrosion testing showed different effects of laser power and production speed on the properties of the laser treated surfaces. It was shown that a high intensity and slow processing rate affect the surfaces by forming oxides that are relatively stable in a corrosive environment of 0.1 M NaCl. Spectroscopic investigations including scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) analyses showed the differences in chemical structure of the surface layer formed after laser treatment. Similarly, microstructural investigations showed different effects on the surface and sub-surface layer of the laser treated samples.

• Language: English
• Keywords: Ti alloy, laser treatment, corrosion, X-ray photoelectron spectroscopy (XPS), laser color creation, microstructure, passive film
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2019
• Number of pages: 14 str.
• Numbering: Vol. 9, iss. 6, art. 375
• PID: 20.500.12556/RUL-132236
• UDC: 54
• ISSN on article: 2079-6412
• DOI: 10.3390/coatings9060375
• COBISS.SI-ID: 2463591
• Publication date in RUL: 18.10.2021

Record is a part of a journal

• Title: Coatings
• Shortened title: Coatings
• Publisher: MDPI AG
• ISSN: 2079-6412
• COBISS.SI-ID: 523035673

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 09.06.2019

Secondary language

• Language: Slovenian
• Keywords: Ti zlitina, laserska obdelava, korozija, XPS