Studies of Li depletion in sections of a Li 2 CO 3 -primer comprising a polyurethane binder, MgO, TiO 2 , BaSO 4 in addition to Li 2 CO 3, were performed using a combination of particle induced γ-ray and X-ray emission spectroscopies along with SEM/EDS analysis. A mixture of depletion behaviours was observed. At the earliest stages (to around 48 h)initial release was confined to the surface. At longer times (168 h)voids developed deeper into the primer and after 500 h Li 2 CO 3 dissolution was observed at places throughout the thickness of the primer to the metal/primer interface. Microscopic transport pathways formed which involved all large inorganic particles. SEM showed that rupture of the polyurethane matrix contributed to network formation. Finite element analysis indicated that rupture may be due to internal stresses around particles isolated in the polyurethane matrix and associated with water uptake. Thus the transport network seemed to be generated by chemical dissolution at the particle/polymer interface and may be enhanced by mechanical degradation due to internal mechanical stresses. The release kinetics of the Li 2 CO 3 inhibitor from the primer was followed as a function of time and the data analysed according to a release behaviour of t n . There was very rapid initial release of Li followed by a slower release of Mg and to a lesser extent Ba. The value of n varied significant with time, but showed a mixture of Fickian release and direct dissolution for Mg and Ba at intermediate times, but transport through a pore network at longer times. The leaching data was interpreted in terms of local transport networks that developed in the primer with time. @en

Rare earths have been studied extensively as corrosion inhibitors for a range of metals. However, there is little information about the viability of the rare earths as inhibitors from the perspective of price and availability. This chapter reveals that from a price perspective, Ce and La are competitive with V and cheaper than Mo, but more expensive than Ti and Zr compounds. In terms of availability La, Ce, Nd and Pr are relatively plentiful, but production volumes fall far short of that required to replace chromium inhibitors. Nd and Pr are nearly ten times more expensive than either Ce or La.@en

The role of constituent intermetallic particles in the pitting corrosion of aluminium (Al) alloys is well recognised. A definitive quantification of the role of unique constituent particles has contributed towards an enhanced understanding of Al-alloy corrosion, however the complexity of Al-alloy microstructures warrants further attention. In the present work we identify a unique intermetallic type in contemporary versions of AA2024-T3, which has a two-phase structure, defined by two distinct crystal types, and distinct compositions. Detailed characterisation is used to unambiguously define this constituent, along with its role in localised corrosion.@en

The role of constituent intermetallic particles in the pitting corrosion of aluminium (Al) alloys is well recognised. A definitive quantification of the role of unique constituent particles has contributed towards an enhanced understanding of Al-alloy corrosion, however the complexity of Al-alloy microstructures warrants further attention. In the present work we identify a unique intermetallic type in contemporary versions of AA2024-T3, which has a two-phase structure, defined by two distinct crystal types, and distinct compositions. Detailed characterisation is used to unambiguously define this constituent, along with its role in localised corrosion.@en

The role of constituent intermetallic particles in the pitting corrosion of aluminium (Al) alloys is well recognised. A definitive quantification of the role of unique constituent particles has contributed towards an enhanced understanding of Al-alloy corrosion, however the complexity of Al-alloy microstructures warrants further attention. In the present work we identify a unique intermetallic type in contemporary versions of AA2024-T3, which has a two-phase structure, defined by two distinct crystal types, and distinct compositions. Detailed characterisation is used to unambiguously define this constituent, along with its role in localised corrosion.@en

This book is about reviewing and exploring the opportunities for introducing increased functionality into coating systems. The intention is to not only provide an account of recent developments, such as other books of this genre, but to also review, in detail, the nature of the problems that we are trying to address in advancing the materials science of coating systems. To this end we examine the fundamentals of corrosion science, the materials science of coatings, and developments in characterisation methods that all help to give an overview of the field. Importantly, we also look at the needs of industry with respect to developments in the coatings field.@en