Searched for: contributor:"De Wit, J.H.W. (promotor)"
(1 - 20 of 52)

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Cerezo Palacios, J.M. (author)
In this PhD work, a new surface treatment based on the application of Zr-based conversion coatings by immersion in a Cu containing Zr-based conversion solution was investigated as a replacement of the traditional phosphating process for the automotive industry. Nowadays most of the cars are made of a combination of different metals, therefore,...
doctoral thesis 2015
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Homborg, A.M. (author)
The interpretation of electrochemical noise (EN) data has long been under discussion. Throughout the years, many data analysis techniques have been proposed for this purpose. As a starting point, procedures and parameters that enable identification of, or discrimination between, general and localized corrosion processes through EN are critically...
doctoral thesis 2014
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Farias Moreno, D.E. (author)
Weight reduction of car bodies can be achieved by application of steel components with a lower thickness; however mechanical properties (for constructive and safety reasons) must be maintained, which can be achieved by using (U)HSS steels. These steels have been designed and optimized for improved mechanical behavior and therefore normally have...
doctoral thesis 2014
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Norouzi Afshar, F. (author)
Aluminium brazing sheet is a sandwich material made out of two aluminium alloys (AA4xxx/AA3xxx) and is widely used in automotive heat exchangers. One of the main performance criteria for heat exchanger units is the lifetime of the product. The lifetime of the heat exchanger units is determined by their corrosion resistance. The most common way...
doctoral thesis 2013
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Heyer, A. (author)
Microbiologically influenced corrosion (MIC) is known to be a dangerous process in ship tanks due to its rapid and yet unpredictable occurrence, leading to extremely fast local corrosion, possibly jeopardizing the structural integrity, in a relatively short time. This project focuses on a fundamental understanding of MIC processes in ship...
doctoral thesis 2013
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Özkanat, Ö. (author)
doctoral thesis 2013
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Taheri, P. (author)
The aim of this Ph.D. work is to investigate the adhesion and de-adhesion of organic coatings on galvanized steel substrate. Chapter 1 introduces the project aim and research outline. Chapter 2 investigates Zn oxide semiconductor properties as the major compound formed on galvanized steel. The results showed a clear effect of surface treatment...
doctoral thesis 2012
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Boelen, B. (author)
Recent developments in various countries have led to the development of new types of polymer coated packaging steel. These materials behave differently in production and end use and are therefore subject of extensive studies. The aim of this research is to understand the influence of deformation of pre-coated packaging steel sheet on real can...
doctoral thesis 2009
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Bos, W.M. (author)
Corrosion of metals has an enormous economic impact. Fortunately, the rate at which corrosion processes take place can be reduced, often to a point where, at least temporarily, corrosion is virtually non-existent. One of these, corrosion-control methods is barrier protection. The concept of barrier rotection is to separate the metal substrate...
doctoral thesis 2008
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The presence of a heavily deformed surface layer (a few microns thick) on rolled aluminium alloy is understood to be one of the main reasons contributing to the Filiform Corrosion (FFC) susceptibility of the alloy. The surface layer is formed during the thermo-mechanical processing of the sheet metal, in the rolling mills. The surface layer...
doctoral thesis 2007
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Flores Ramirez, J.R. (author)
An investigation concerning the effects of magnesium on the intergranular corrosion susceptibility of AA5XXX aluminium alloys was carried out. In the present work, magnesium is found to be highly mobile in the bulk metal as well as in the aluminium oxide. This mobility is also found to be dependent on the temperature and bulk magnesium...
doctoral thesis 2006
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Hamer, W.J. (author)
Chromate compounds have been widely used to improve the corrosion protection of galvanised steel and aluminium objects in the past decades. The hexavalent chromium in chromate enhances the adherence of coatings to galvanised steel and aluminium. Additionally, if the passive layers on these materials should become damaged, hexavalent chromium...
doctoral thesis 2005
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de Vries, S.M. (author)
doctoral thesis 2005
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Zhang, X. (author)
With the aims of understanding the protective mechanism of chromate conversion coatings and developing alternatives to chromate treatments, the physical natures and corrosion properties of Cr(VI) and Cr(III) treated zinc have been investigated in this work. The Cr(VI) treatments were carried out in dichromate and sulfuric acid solution with...
doctoral thesis 2005
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Van den Brand, J. (author)
The aim of this PhD work was to obtain knowledge on the adhesion between polymers and aluminium and the influence of water on this. In the thesis, first a fundamental approach is followed to study adhesion and delamination. A given polymer is simplified to a molecule, having the same, for adhesion relevant, functional groups. This molecule is...
doctoral thesis 2004
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Beentjes, P.C.J. (author)
doctoral thesis 2004
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Andreatta, F. (author)
Aluminium alloys of the 7xxx series (Al-Zn-Mg-Cu) are susceptible to localized types of corrosion like pitting, intergranular corrosion and exfoliation corrosion. This represents a limitation for the application of these alloys in the aerospace components because localized corrosion might have a negative effect on safety and costs. This PhD...
doctoral thesis 2004
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Au, Siu Fai (author)
The world's energy consumption is growing extremely rapidly. Fuel cell systems are of interest by researchers and industry as the more efficient alternative to conventional thermal systems for power generation. The principle of fuel cell conversion does not involve thermal combustion and hence in theory fuel cell systems can be far more...
doctoral thesis 2003
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Meijers, S.D. (author)
doctoral thesis 2002
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Campestrini, P. (author)
doctoral thesis 2002
Searched for: contributor:"De Wit, J.H.W. (promotor)"
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