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undergraduate thesis
Utjecaj pH-vrijednosti na koroziju nehrđajućeg čelika za ortopedske pločice
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. urn:nbn:hr:235:129741
Kordić, Nikola
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

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Kordić, N. (2021). Utjecaj pH-vrijednosti na koroziju nehrđajućeg čelika za ortopedske pločice (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:129741

Kordić, Nikola. "Utjecaj pH-vrijednosti na koroziju nehrđajućeg čelika za ortopedske pločice." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:129741

Kordić, Nikola. "Utjecaj pH-vrijednosti na koroziju nehrđajućeg čelika za ortopedske pločice." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:129741

Kordić, N. (2021). 'Utjecaj pH-vrijednosti na koroziju nehrđajućeg čelika za ortopedske pločice', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 20 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:129741

Kordić N. Utjecaj pH-vrijednosti na koroziju nehrđajućeg čelika za ortopedske pločice [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2021 [cited 2024 December 20] Available at: https://urn.nsk.hr/urn:nbn:hr:235:129741

N. Kordić, "Utjecaj pH-vrijednosti na koroziju nehrđajućeg čelika za ortopedske pločice", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:235:129741

Metadata
TitleUtjecaj pH-vrijednosti na koroziju nehrđajućeg čelika za ortopedske pločice
Title (english)The effect of pH value on stainless steel corrosion for orthopedic plates
AuthorNikola Kordić
MentorVera Rede (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2021-09-29, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
Cilj ovog završnog rada bio je analizirati utjecaj pH-vrijednosti na koroziju nehrđajućeg čelika za ortopedske pločice. U teorijskom dijelu rada opisani su biomaterijali s posebnim naglaskom na materijale koji se koriste za izradu ortopedskih implantata. U eksperimentalnom dijelu rada provedena je analiza kemijskog sastava i analiza mikrostrukture ortopedske pločice od nehrđajućeg čelika. Ispitan je utjecaj pH-vrijednosti 0,9% otopine natrijevog klorida (NaCl) na promjenu mase i na korozijsku postojanost analiziranog čelika. Analizirana pločica napravljena je od austenitnog nehrđajućeg čelika oznake X2CrNiMo17-12-2, koji u mikrostrukturi sadrži i malu količinu d-ferita. Na rubu poprečnog presjeka pločice izmjerena je mikrotvrdoća od 188 HV0,1, a u sredini 172 HV0,1. Promjena mase pri 60-dnevnom tretiranju uzoraka u otopinama jako varira s promjenom pH-vrijednosti, od prirasta mase kod viših pH-vrijednosti, do gubitka mase kod nižih pH-vrijednosti. Metodom spektrometrije masa uz induktivno spregnutu plazmu (ICP-MS) utvrđeno je da promjena pH-vrijednosti otopine utječe na koncentraciju iona otpuštenih iz čelika. Izmjerena je najveća koncentracija iona željeza, nikla, kroma i molibdena, a nešto manja koncentracija bakra i sumpora. Nije bilo otpuštanja iona Si, P i V.
Abstract (english)
The main aim of the study was to investigate the influence of the pH value on the corrosion of stainless steel for orthopedic plates. The theoretical part describes biomaterials with special emphasis on the material used to make orthopedic implants. In the experiment the analysis of the chemical composition and the analysis of the microstructure of the stainless steel orthopedic plate was performed. The influence of the pH value of the 0.9% NaCl solution on the change in mass and on the corrosion resistance of the analyzed steel was explored. The analyzed plate is made of austenitic stainless steel marked X2CrNiMo17-12-2, which contains a small amount of d-ferrite in the microstructure. The microhardness of 188 HV0,1 was measured at the edge of the cross section of the plate, and 172 HV0,1 in the middle. The change in mass during the 60-day treatment of samples in solution varies greatly with the change in pH from weight gain at higher pH values to weight loss at lower pH values. Inductively coupled plasma mass spectrometry (ICP-MS) showed that the change in pH of the solution affects the concentration of ions released from the steel. The highest concentration of iron, nickel, chromium, and molybdenum ions, and the slightly lower concentration of copper and sulfur were measured. There was no release of Si, P, and V ions.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:129741
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2021-09-27 10:08:46