Izvorni znanstveni članak
https://doi.org/10.18048/2022.04.06
The Analyses of the Rate of Pitting Corrosion of a NiTi Rod in a Natural Marine Environment
Špiro Ivošević
orcid.org/0000-0001-6670-4770
; University of Montenegro, Maritime Faculty Kotor, Put I Bokeljske brigade 44, Kotor, Montenegro
Nataša Kovač
orcid.org/0000-0002-6671-2938
; University of Donja Gorica, Faculty of Applied Sciences, Oktoih 1, DonjaGorica, Podgorica, Montenegro
Gyöngyi Vastag
; University Novi Sad, Faculty of Sciences, Trg Dositeja Obradovića 3, 21 000 Novi Sad, Serbia
Peter Majerič
; University of Maribor, Faculty of Mechanical Engineering, Smetanova ulica 17, 2000 Maribor, Slovenia
Rebeka Rudolf
; University of Maribor, Faculty of Mechanical Engineering, Smetanova ulica 17, 2000 Maribor, Slovenia
Sažetak
The analysis of the behaviour of new materials in the natural environment is important for their
application and commercial use. In order to explore the application of Shape Memory Alloys in the
Maritime industry, this research focuses on the corrosive behaviour of the NiTi rod that was produced
by means of a continuous casting process. The experiment included three samples of NiTi rods that
were exposed to the marine environment for 6, 12 and 18 months at a depth of 3 metres below the
surface. The morphological and chemical changes were analysed separately during the experiment.
Ultrasonic thickness equipment and the Scanning Electron Microscope (SEM) technique were used
for the tests that determined the corrosion rates and detected pitting. The changes in the chemical
composition of the NiTi rod were investigated by means of an Energy Dispersive X-ray (EDX)
analysis, in order to define the pitting behaviour of the rod`s surfaces during its exposure to seawater.
The obtained research results prove that the rate of pitting corrosion follows a progressive curve –
the minimum value of corrosion rate equalled 0.04 mm/month, while the maximum value was 0.12
mm/month.
Ključne riječi
NiTi rod; seawater; pitting corrosion; chemical composition; SEM; EDX
Hrčak ID:
278663
URI
Datum izdavanja:
24.4.2022.
Posjeta: 474 *