Carboxylate complexes corrosion inhibitors

There is an increasing number of ab initio PBC works devoted to the adsorption of inhibitor molecules on metal or oxidized metal surfaces. They are summarized in Table 5.3 for different metals, Al, Cu, Fe, Zn, and their oxides. This hst is not exhaustive, but provides a good view of the emerging possibilities of ab initio modeling. The molecules considered as potential corrosion inhibitors are azoles, carboxylates, and amines. For each metal, the studies are presented in the order of increasing complexity of the interface works presenting adsorption at low coverage are presented, then results on fiiU layer formation. Finally, the sohd/liquid interface and adsorption at this interface is presented. 

Rare earth corrosion inhibitors carboxylate complexes... 

This section is devoted solely to rare earth caiboxylates, as they are potential (or actual) dual function corrosion inhibitors. The largest class of rare earth polymeric complexes is that which contains carboxylate ligands. These oxophihc metals are well suited to forming complexes with carboxylate ligands. Many examples of... 

The presence of the free acid or carboxylate salt combined with the sulfonate group has suggested the use of such materials as corrosion inhibitors when applied to metal surfaces, which can form strong salts or complexes with carboxylic acid groups. Related applications would be in ore flotation. The materials have also found some utility as viscosity reducers in liquid detergent formulations. 

The utilisation of organic anions as components of a multifunctional inhibitor complex has largely been successful because of their ability to form barrier layers on the metal surface. For example, carboxylic acids have long been known to impart some degree of protection to metal surfaces [156]. Deposited films of polypyrrole [157] and organosilane [158] films on aluminium alloys have improved the resistance to corrosion, while adsorbed surfactants have also been successful by impeding the diffusion of corrosive agents into the matrix [159]. 

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