Utjecaj ekstrakata ružmarina na koroziju aluminija i aluminijske legure AlMg3 u 3% NaCl

master's thesis

• Title (english): Influence of rosemary extracts on aluminium and aluminium alloy AlMg3 corrosion in 3% NaCl
• Author: Andreja Čunčić
• Mentor: Katarina Berković (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Chemistry and Biochemistry); (Laboratory for Physical Chemistry and Corrosion); Zagreb
• Defense date and country: 2008-03-05, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology

Abstract

U ovom radu istraženo je djelovanje ekstrakata ružmarina na proces korozije aluminija i aluminijske legure AlMg3 u 3%-tnoj otopini natrijeva klorida. Određivanja su provedena gravimetrijskom metodom promjene mase i elektrokemijskom metodom potenciostatske polarizacije. Gravimetrijska određivanja brzina korozije su provedena sa tri paralelna uzorka aluminija i legure AlMg3, koji su bili izloženi djelovanju slijedećih otopina: 3% NaCl, 3% NaCl sa dodatkom otopina ružmarina pripremljenih sa vodom temperature 298,15 K i 373,15 K te 3% NaCl sa dodatkom otopina ružmarina pripremljenih s etanolom pri temperaturi 298,15 K. Određivanja struja korozije su provedena potenciostatskom metodom polarizacije legura AlMg3 u 3% NaCl i u 3% NaCl sa dodatkom otopina inhibitora. Na osnovu vrijednosti brzina korozije i struja korozije, određene su pokrivenosti površina i stupnjevi zaštite od korozije. Pripravljeni ekstrakti ružmarina su pokazali dobru zaštitu od korozije aluminija i aluminijske legure u 3%-tnoj otopini NaCl.

Abstract (english)

The inhibition effect of rosemary extracts on corrosion process of aluminium and AlMg3 alloy in 3% NaCl solution has been investigated in this work. Measurements were carried out using gravimetric weight change and electrochemical potentiostatic polarization methods. Gravimetric measurements to determine corrosion rates were performed using three parallel samples of aluminium and aluminium alloy which have been immersed in following solutions: 3% NaCl, 3% NaCl containing rosemary extracts prepared with water at temperatures 298,15 K and 373,15 K and 3% NaCl containing rosemary extracts prepared with ethanol at temperature 298,15 K. Corrosion current measurements by potentiostatic polarization method were carried out on aluminium alloy AlMg3 in 3% NaCl and in 3% NaCl containing inhibitor solutions. Surface coverages and inhibition efficiensis were calculated using corrosion rate and corrosion current values. Prepared rosemary extracts have shown good protection of aluminium and AlMg3 alloy corrosion in 3% NaCl solution.

• Keywords: ambalaža; korozija; inhibitori; aluminij; ružmarin
• Keywords (english): packing; corrosion; inhibitors; aluminium; rosemary
• Language: croatian
• URN:NBN: urn:nbn:hr:159:877015
• Study programme: Title: Biotechnology; specializations in: Biochemical Engineering; Course: Biochemical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: diplomirani inženjer biotehnologije; smjer biokemijsko inženjerstvo (diplomirani inženjer biotehnologije; smjer biokemijsko inženjerstvo)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-09-04 12:19:58