Inhalt

•  
   Acknowledgement v
•  
   Abstract vi
•  
   1 State of research and motivation 1
•  
  2 Fundamentals 4
•  
  2.1 Corrosion of zinc and zinc alloy coated steel 4
•  
   2.1.1 General corrosion mechanism under atmospheric conditions 4
•  
   2.1.2 General corrosion mechanism under full immersion 9
•  
   2.1.3 In–situ Raman spectroscopic analysis of zinc corrosion products 13
•  
  2.2 Molecular adhesion on aluminum and zinc oxides 14
•  
   2.2.1 Adsorption of monolayers 15
•  
   2.2.2 Understanding of interfacial bond formation 18
•  
  2.3 Fundamentals of adhesion and de–adhesion of polymers on oxide covered metals 19
•  
   2.3.1 Wet de–adhesion 20
•  
   2.3.2 Corrosive de–adhesion of polymers on zinc substrates 21
•  
   2.4 Raman spectroscopic analysis of polymer/metal interface 22
•  
  3 Theoretical background of applied analytical techniques 25
•  
  3.1 Spectroscopic techniques 25
•  
   3.1.1 Raman spectroscopy 25
•  
   3.1.2 Infrared spectroscopy 27
•  
   3.1.3 X–ray photoelectron spectroscopy (XPS) 29
•  
  3.2 Electrochemical techniques 30
•  
   3.2.1 Scanning Kelvin probe (SKP) 31
•  
   3.2.2 Cyclic voltammetry (CV) 32
•  
   3.2.3 Scanning Kelvin probe force microscopy (SKPFM) 33
•  
  3.3 Microscopic techniques 35
•  
   3.3.1 Scanning electron microscopy (SEM) 35
•  
   3.3.2 Atomic force microscopy (AFM) 36
•  
   3.4 Contact angle measurement 37
•  
  4 In–situ corrosion analysis of zinc alloy coated steel 39
•  
  4.1 Experimental 39
•  
   4.1.1 Materials and sample preparation 39
•  
   4.1.2 Surface Analysis 40
•  
   4.1.3 In–situ Raman spectroscopy 40
•  
   4.2 Surface morphology and microstructure 41
•  
   4.3 Bulk composition of the alloy 44
•  
   4.4 Electronic surface properties 47
•  
   4.5 Corrosion processes and mechanisms at different pH 50
•  
   4.6 Conclusions 58
•  
  5 In–situ corrosion analysis of zinc magnesium alloy coated steel 59
•  
  5.1 Experimental 59
•  
   5.1.1 Materials and sample preparation 59
•  
   5.1.2 Surface Analysis 60
•  
   5.1.3 In–situ Raman spectroscopy 60
•  
   5.2 Surface morphology and bulk composition of the alloy 60
•  
   5.3 Corrosion process and mechanisms at different pH 63
•  
   5.4 Conclusions 70
•  
  6 In–situ corrosion analysis of oxide covered iron/ zinc alloy cut edges 72
•  
  6.1 Experimental 72
•  
   6.1.1 Materials and sample preparation 72
•  
   6.1.2 Surface Analysis 72
•  
   6.1.3 In–situ Raman spectroscopy 73
•  
   6.2 Cut edge morphology and chemistry 73
•  
   6.3 Corrosion process and mechanism 75
•  
   6.4 Conclusions 79
•  
  7 Adsorption and stability of self–assembled organophosphonic acid monolayers on plasma modified Zn–Mg–Al alloy surfaces 80
•  
  7.1 Experimental 80
•  
   7.1.1 Materials and Sample Preparation 80
•  
   7.1.2 Plasma Surface Chemistry 81
•  
   7.1.3 Adsorption and Self–Organization of Organic Acids 81
•  
   7.1.4 Surface Analysis 81
•  
   7.2 Plasma surface chemistry 83
•  
   7.3 Adsorption and self–organization of organic acids 91
•  
   7.4 Stability of organic acids on Zn–Mg–Al alloys 96
•  
   7.5 Blocking of surface sites oxide covered on Zn–Mg–Al alloys by ODPA SAMs 98
•  
   7.6 Conclusions 100
•  
  8 Surface chemistry and adhesive properties of plasma modified Zn–Mg–Al alloy coatings 101
•  
  8.1 Experimental 101
•  
   8.1.1 Modification of the surface by plasma treatment 101
•  
   8.1.2 Application of adhesion promoter and the model polymer coating 102
•  
   8.1.3 Characterization of the surface chemistry after plasma treatments and APPA adsorption 102
•  
   8.1.4 Peel–test measurements 103
•  
   8.2 Characterization of the plasma modified samples 103
•  
   8.3 Adsorption of APPA on the plasma modified sample surface 108
•  
   8.4 The effect of plasma treatments and APPA adsorption on the adhesion of epoxy amine coating on Zn–Mg–Al alloy surfaces 113
•  
   8.5 Conclusions 115
•  
   9 Overall conclusions and outlook 116
•  
   References 119
•  
   Abbreviations and symbols 127
•  
   List of Figures 129
•  
   List of Tables 134
•  
   List of Publications 135
•  
   Curriculum Vitae 137
•  
   Acknowledgement
•  
   Abstract
•  
   1 State of research and motivation
•  
  2 Fundamentals
•  
  2.1 Corrosion of zinc and zinc alloy coated steel
•  
   2.1.1 General corrosion mechanism under atmospheric conditions
•  
   2.1.2 General corrosion mechanism under full immersion
•  
   2.1.3 In–situ Raman spectroscopic analysis of zinc corrosion products
•  
   2.2 Molecular adhesion on aluminum and zinc oxides
•  
   2.2.1 Adsorption of monolayers
•  
   2.2.2 Understanding of interfacial bond formation
•  
   2.3 Fundamentals of adhesion and de–adhesion of polymers on oxide covered metals
•  
   2.3.1 Wet de–adhesion
•  
   2.3.2 Corrosive de–adhesion of polymers on zinc substrates
•  
   2.4 Raman spectroscopic analysis of polymer/metal interface
•  
  3 Theoretical background of applied analytical techniques
•  
  3.1 Spectroscopic techniques
•  
   3.1.1 Raman spectroscopy
•  
   3.1.2 Infrared spectroscopy
•  
   3.1.3 X–ray photoelectron spectroscopy (XPS)
•  
   3.2 Electrochemical techniques
•  
   3.2.1 Scanning Kelvin probe (SKP)
•  
   3.2.2 Cyclic voltammetry (CV)
•  
   3.2.3 Scanning Kelvin probe force microscopy (SKPFM)
•  
  3.3 Microscopic techniques
•  
   3.3.1 Scanning electron microscopy (SEM)
•  
   3.3.2 Atomic force microscopy (AFM)
•  
   3.4 Contact angle measurement
•  
  4 In–situ corrosion analysis of zinc alloy coated steel
•  
  4.1 Experimental
•  
   4.1.1 Materials and sample preparation
•  
   4.1.2 Surface Analysis
•  
   4.1.3 In–situ Raman spectroscopy
•  
   4.2 Surface morphology and microstructure
•  
   4.3 Bulk composition of the alloy
•  
   4.4 Electronic surface properties
•  
   4.5 Corrosion processes and mechanisms at different pH
•  
   4.6 Conclusions
•  
  5 In–situ corrosion analysis of zinc magnesium alloy coated steel
•  
  5.1 Experimental
•  
   5.1.1 Materials and sample preparation
•  
   5.1.2 Surface Analysis
•  
   5.1.3 In–situ Raman spectroscopy
•  
   5.2 Surface morphology and bulk composition of the alloy
•  
   5.3 Corrosion process and mechanisms at different pH
•  
   5.4 Conclusions
•  
  6 In–situ corrosion analysis of oxide covered iron/ zinc alloy cut edges
•  
  6.1 Experimental
•  
   6.1.1 Materials and sample preparation
•  
   6.1.2 Surface Analysis
•  
   6.1.3 In–situ Raman spectroscopy
•  
   6.2 Cut edge morphology and chemistry
•  
   6.3 Corrosion process and mechanism
•  
   6.4 Conclusions
•  
  7 Adsorption and stability of self–assembled organophosphonic acid monolayers on plasma modified Zn–Mg–Al alloy surfaces0F
•  
  7.1 Experimental
•  
   7.1.1 Materials and Sample Preparation
•  
   7.1.2 Plasma Surface Chemistry
•  
   7.1.3 Adsorption and Self–Organization of Organic Acids
•  
   7.1.4 Surface Analysis
•  
   7.2 Plasma surface chemistry
•  
   7.3 Adsorption and self–organization of organic acids
•  
   7.4 Stability of organic acids on Zn–Mg–Al alloys
•  
   7.5 Blocking of surface sites oxide covered on Zn–Mg–Al alloys by ODPA SAMs
•  
   7.6 Conclusions
•  
  8 Surface chemistry and adhesive properties of plasma modified Zn–Mg–Al alloy coatings1F
•  
  8.1 Experimental
•  
   8.1.1 Modification of the surface by plasma treatment
•  
   8.1.2 Application of adhesion promoter and the model polymer coating
•  
   8.1.3 Characterization of the surface chemistry after plasma treatments and APPA adsorption
•  
   8.1.4 Peel–test measurements
•  
   8.2 Characterization of the plasma modified samples
•  
   8.3 Adsorption of APPA on the plasma modified sample surface
•  
   8.4 The effect of plasma treatments and APPA adsorption on the adhesion of epoxy amine coating on Zn–Mg–Al alloy surfaces
•  
   8.5 Conclusions
•  
   9 Overall conclusions and outlook
•  
   References
•  
   Abbreviations and symbols
•  
   List of Figures
•  
   List of Tables
•  
   List of Publications
•  
   Curriculum Vitae