Utjecaj sastava metalne podloge na formiranje zaštitnog filma dugolančane fosfonske kiseline

master's thesis

• Title (english): The influence of the composition of metallic substrate on the formation of protective film of long-chain organic acid
• Author: Magdalena Osrečak
• Mentor: Helena Otmačić Ćurković (mentor)
• Committee member: Helena Otmačić Ćurković (predsjednik povjerenstva)
• Committee member: Marijana Kraljić Roković (član povjerenstva)
• Committee member: Mirela Leskovac (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2020-09-15, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Samoorganizirajući monoslojevi (SAM) dugolančanih organskih kiselina nastaju adsorpcijom kiseline na površini oksida metala što dovodi do kiselinsko- bazne reakcije između oksida metala kiseline. Samoorganizacijom alkilnih lanaca stvara se tanak i kompaktni film za površini. Samoorganizirajući monoslojevi su jednostavna i novija metoda zaštite materijala, imaju široku primjenu u biologiji, elektronici, nanoelektromehaničkim i mikroelektromehaničkim sustavima i u elektrokemiji. Pokazali su se kao dobri inhibitori korozije na raznim metalnim podlogama U ovom radu istraživan je utjecaj sastava metalne podloge na formiranje zaštitnog filma dugolančane fosfonske kiseline. Na taj način nastojalo se poboljšati korozijsku stabilnost uzoraka CuSn6 i PbCu bronci i čistog bakra u umjetnoj kiseloj kiši. Metodom elektrokemijske impedancijske spektroskopije praćeno je korozijsko ponašanje ispitivanih bronci i bakra sa i bez filma16-fosfonoheksadekanoične kiseline.

Abstract (english)

Self-assembled monolayers (SAM) of long-chain organic acids are formed by the adsorption of acid on the surface of oxide-covered metal, resulting in acid-base reaction between metal oxide and acid. Self-organization of alkyl chains creates a very thin and compact film. Self-assembled monolayers are a simple and new method of material protection, used in many fields such as application in biology, electronics, nanoelectromechanical and microelectromechanical systems and in electrochemistry. They have proven to be good corrosion inhibitors on various metal substrates In this paper, the influence of the composition of the metal substrate on the formation of a protective film of long-chain phosphonic acid is investigated. In this way, efforts were made to improve the corrosion stability of CuSn6 and PbCu bronze samples and pure copper in artificial acid rain. The electrochemical impedance spectroscopy is used to examine the corrosion behaviour of studied bronzes and copper with and without the 16-phosphonohexadecanoic acid film.

• Keywords: SAM; fosfonska kiselina; elektrokemijska impedancijska spektroskopija
• Keywords (english): SAM; phosphonic acid; electrochemical impedance spectroscopy
• Language: croatian
• URN:NBN: urn:nbn:hr:149:046384
• Project: Number: IP-2019-04-5030; Title: Razvoj novih rješenja za karakterizaciju i zaštitu brončane kulturne baštine izložene vanjskom okolišu; Title: Development of New Solutions for Characterization and Protection of Bronze Cultural Heritage Exposed to Outdoor Environment; Acronym: BroCH; Leader: Helena Otmačić Ćurković; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• 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: 2022-03-06 17:00:36