Elektropoliranje čelika za primjenu u farmaceutskoj industriji

master's thesis

• Title (english): Electropolishing of steel for application in pharmaceutical industry
• Author: Predrag Prodanović
• Mentor: Marijana Kraljić Roković (mentor)
• Committee member: Marijana Kraljić Roković (predsjednik povjerenstva)
• Committee member: Helena Otmačić Ćurković (član povjerenstva)
• Committee member: Domagoj Vrsaljko (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2017-10-30, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Chemical Engineering in Material Development

Abstract

Svrha ovog rada bila je odrediti optimalne uvijete za proces elektropoliranja austenitnog nehrđajućeg čelika X2CrNiMo17-12-2 (AISI 316L) za primjenu u farmaceutskoj industriji. Ispitivani su utjecaji vremena elektropoliranja, temperature elektrolita, udaljenosti između elektroda i prethodne mehaničke obrade. Uspješnost procesa procjenjivala se mjerenjem korozijske otpornosti tretiranih uzoraka elektrokemijskim metodama Tafelova ekstrapolacija, elektrokemijska impedancijska spektroskopija i linearna polarizacija u otopini NaCl masene koncetracije 3 % te mjerenjem površinske hrapavosti tretiranih uzoraka. Najbolji rezultati dobiveni su pri trajanju procesa od 15 minuta na sobnoj temperaturi za međusobne udaljenosti elektroda od 2 i 4 cm, dok prethodna mehanička obrada nema utjecaja na korozijsku otpornost tretiranog uzorka.

Abstract (english)

The purpose of this paper was to determine the optimal conditions for the electropolishing process of austenitic stainless steel X2CrNiMo17-12-2 (AISI 316L) for application in the pharmaceutical industry. The effects of electropolishing time, electrolyte temperature, distance between electrodes and previous mechanical processing were studied. The success of the process was evaluated by measuring the corrosion resistance of the treated samples by electrochemical methods of Tafel's extrapolation, electrochemical impedance spectroscopy, linear polarization in a 3 % NaCl solution and by measuring the surface roughness of the treated samples. The best results were obtained during the 15-minute process at room temperature for the distance between the electrodes of 2 and 4 cm, whereas the previous mechanical processing did not influence the corrosion resistance of the treated sample.

• Keywords: AISI 316L; elektrokemijska impendancijska spektroskopija; elektropoliranje; farmaceutska industrija; linearna polarizacija; nehrđajući čelik; površinska hrapavost; Tafelova ekstrapolacija; X2CrNiMo17-12-2
• Keywords (english): AISI 316L; electrochemical impendence spectroscopy; electropolishing; pharmaceutical industry; linear polarization; stainless steel; surface finish; Tafel extrapolation; X2CrNiMo17-12-2
• Language: croatian
• URN:NBN: urn:nbn:hr:149:100646
• Study programme: Title: Chemical Engineering - Graduate study; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-05-07 09:52:00