Title: Monitoring the effect of amino acid on the corrosion process of metal based on comprehensive micro- and nanospectroscopy investigations

Abstract

Corrosion is a very serious global problem in the various branches of industry. Metals are constantly exposed to the natural environment and aggressive media, thus there is a need to protect them from corrosion. One of the most effective strategies for improving corrosion resistivity of metallic materials is surface modification. The main goal of our research is to study the influence of surface modifications of metal materials using potential inhibitors such as amino acids and nanoparticles (NPs) on the corrosion resistance of these materials and to investigate phenomena that occur at the metal/potential inhibitor interface. The use of organic inhibitors, such as amino acids, has many advantages. Amino acids have been used in various applications for many years. Modification of metallic surfaces, such as the interposition of nanoparticles into metal materials, is one of the methods which can provide corrosion resistance. In thestudies of the corrosion inhibition process by the above-mentioned compounds, we applied mainly: spectroscopic methods such as Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy (RS), and techniques based on the surface-enhanced effects such as surface enhanced infrared absorption spectroscopy (SEIRA), surface-enhanced Raman spectroscopy (SERS). Moreover, the technique which combined conventional IR with atomic force microscopy resulted in a nano-SEIRA technique was used. These methods are great tools for studying corrosion products structure, their distribution on the corroded surface, as well as adsorption processes of potential bio-inhibitors. The application of SERS and SEIRA techniques gives a detailed description of the adsorption of threonine onto the iron surface. Threonine influenced the process of corrosion of the investigated surface due to the existing strong interaction between the protonated amine and carboxylate groups and CuNPs deposited onto the iron surface. The obtained results confirmed that there is a good correlation between the spectra recorded by the SERS, SEIRA, and nano-SEIRA techniques.

Biography

Dominika Święch is an Assistant Professor at the AGH University of Science and Technology in Krakow (Poland). She obtained her PhD degree in chemistry (molecular spectroscopy) at the Faculty of Chemistry, Jagiellonian University in 2014. She was Research Fellow (2013) in the lab of Prof. Yukihiro Ozaki (School of Science and Technology, Kwansei-Gakuin University, Japan). In 2018, shewas working at the Institute of Nuclear Physics Polish Academy of Sciences in Krakow (Poland) during a research internship.Her present research topic is the study ofthe influence of surface modification of metallic materials by potential inhibitors (amino acids and nanoparticles) on the corrosion resistance of these materials and to investigate phenomena that occur at the metal/potential inhibitor interface (Principal Investigator, project titled “Spectroscopic studies in micro- and nanoscale of the corrosion process and its inhibition of the modified metallic surfaces applied in implantology” founded by National Science Centre, Poland, No. 2019/35/D/ST4/02703).