Korozija ugljičnog čelika u različitim elektrolitima

master's thesis

• Title: Korozija ugljičnog čelika u različitim elektrolitima : diplomski rad
• Title (english): Corrosion of carbon steel in different electrolytes : master's thesis
• Author: Marijana Raguž
• Mentor: Gordana Bilić (mentor)
• Committee member: Gordana Bilić (predsjednik povjerenstva)
• Committee member: Frankica Kapor (član povjerenstva)
• Committee member: Anamarija Grbeš Babić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Chemistry); Zagreb
• Defense date and country: 2024-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering; Geological Engineering

Abstract

U diplomskom radu prikazani su rezultati ispitivanja utjecaja različitih elektrolita na korozijsko ponašanje ugljičnog čelika J55, koji se koristi za izradu cjevovoda u proizvodno transportnim sustavima naftne industrije. Objašnjen je pojam korozije, opisane su metode ispitivanja i zaštite od korozije, kao i parametri koji utječu na koroziju u vodenim sustavima. Navedene su i opisane najčešće korištene legure i metali za izradu transportnih cijevi. U radu je prikazana teorijska pozadina triju metoda korištenih u eksperimentalnom dijelu: linearna polarizacija u uskom području potencijala, potenciodinamička polarizacija s Tafelovom ekstrapolacijom i elektrokemijska impedancijska spektroskopija. Cilj rada je utvrditi i usporediti otpornost ugljičnog čelika J55 na koroziju s obzirom na različiti kemijski sastav elektrolita, što je u eksperimentalnom dijelu rada prikazano, te detaljno analizirano i diskutirano u završnom dijelu rada.

Abstract (english)

The thesis presents the results of testing the influence of different electrolytes on the corrosion behavior of carbon steel J55, which is used for the production of pipelines in the production and transportation systems of the oil industry. The concept of corrosion is explained, the methods of testing and protection against corrosion are described, as well as the parameters that affect corrosion in water systems. The most commonly used alloys and metals for the production of transport pipes are listed and described. The thesis presents the theoretical background of the three methods used in the experimental part: linear polarization in a narrow potential range, potentiodynamic polarization with Tafel extrapolation and electrochemical impedance spectroscopy. The aim of the thesis is to determine and compare the corrosion resistance of J55 carbon steel, concerning different chemical compositions of electrolytes, which is demonstrated in the experimental part of the thesis and thoroughly analyzed and discussed in the final part.

• Keywords: korozija; ugljični čelik; elektrolit; linearna polarizacija; Tafelova ekstrapolacija; elektrokemijska impedancijska spektroskopija; korozijska otpornost
• Keywords (english): corrosion; carbon steel; electrolyte; linear polarization; Tafel extrapolation; electrochemical impedance spectroscopy; corrosion resistance
• Language: croatian
• URN:NBN: urn:nbn:hr:169:571625
• Study programme: Title: Geological engineering; specializations in: Hydrogeology and engineering geology, Environmental geology; Course: Environmental geology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka geološkog inženjerstva (magistar/magistra inženjer/inženjerka geološkog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2025-04-22 07:21:32