Novel and self-healing anticorrosion coatings using rare earth compounds

Novel and self-healing anticorrosion coatings using rare earth compounds 

Key words self-healing coating, active corrosion protection, sol-gel coating, 

The design of self-healing coatings for corrosion protection of metals is of particular interest. Ideally, self-healing here implies the total recovery of the functions that the coating possessed prior to damage, that is it implies total recovery of protection against corrosion for the metal. In practice, however, a 

The first successful approach to non-active healing, in which the integrity and barrier protection of the film are (partially) recovered, was proposed by White et al. (2001), and consisted of encapsulated reactive systems in polymeric matrices. This approach has always involved two-agent systems (i.e. resin and crossliner or catalyst) where the two agents are encapsulated  

However, the need to have a two-component healing agent constitutes a drawback of this approach, as there is uncertainty over whether both components will be present at the same time and in the required ratio at the damage sites to ensure complete and/or multiple healings. 

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