Analysis of the Corrosion Resistance of Different Metal Materials Exposed to Varied Conditions of the Environment in the
Different parts of the coastal infrastructure that are made of metal are exposed to the varied conditions of the environment, which accelerates the corrosion of the materials and could, thus, increase pollution. Literature examines the degree of degradati
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nts 1 Introduction 2 Different Metal Structures and Potential Pollutants 3 The Corrosion of Metal Materials in Seawater 3.1 The Influence of Seawater and the Atmosphere 3.2 The Specific Influences of Seawater and the Atmosphere in the Bay of Kotor 4 Materials and Methods 4.1 Materials 4.2 Methods 5 Results and Discussion 5.1 The Results of the Analysis of the NiTi Samples 5.2 Results from the Sample of a Steel Fence 6 Conclusions References
Abstract Different parts of the coastal infrastructure that are made of metal are exposed to the varied conditions of the environment, which accelerates the corrosion of the materials and could, thus, increase pollution. Literature examines the degree of
Š. Ivošević (*) and D. Kovač Faculty of Maritime Studies Kotor, University of Montenegro, Kotor, Montenegro e-mail: [email protected]; [email protected] G. Vastag Faculty of Sciences, University Novi Sad, Novi Sad, Serbia e-mail: [email protected] P. Majerič and R. Rudolf Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia e-mail: [email protected]; [email protected] Danijela Joksimović, Mirko Đurović, Igor S. Zonn, Andrey G. Kostianoy, and Aleksander V. Semenov (eds.), The Montenegrin Adriatic Coast: Marine Chemistry Pollution, Hdb Env Chem, DOI 10.1007/698_2020_644, © Springer Nature Switzerland AG 2020
Š. Ivošević et al.
degradation of metal materials caused by corrosion and the resistance to the influences of the environment the materials are exposed to. The scientific discussion is based on the historical data regarding the key parameters of the sea and atmosphere and the changeable conditions caused by the sequences of ebb and flood tides that are typical for the Bay of Kotor. The paper presents the process of corrosion based on samples of a disc-like alloy of nickel and titanium (NiTi) and a steel fence, depending on the varied conditions of the environment and the length of exposure. The NiTi alloy was exposed to different influences of the sea and atmosphere for 6 months, while the steel fence was exposed continuously to the influences of the coastal atmosphere over a longer period of time. The chemical analysis of the particular parts of the materials and their corrosion phases was conducted by means of Energy Dispersive X-ray (EDX) semi-quantitative analysis. The results obtained from the EDX analysis were further revised by the method of linear regression and a multivariate method, principal component analysis (PCA), in order to define precisely the influences of a corrosive environment on the corrosion of the analysed NiTi alloy. The results acquired from the linear regression analysis prove that the NiTi alloy in every type of environment in coastal conditions corrodes by forming additional oxides. As expected, the corrosion caused by the air is the slowest and the most uniform, while the most intensive dissolution of nickel and titanium is in the sea, where the most heterogenous corrosive surface was registered as well. In relation to the linear regression analysis, the multivaria
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