Self-healing coatings

Hybrid sol-gel/conducting polymer coatings self-healing coatings for the corrosion protection of aerospace alloys... 

The wide range of soHd lubricants can generally be classified as either inorganic compounds or organic polymers, both commonly used in a bonded coating on a matching substrate, plus chemical conversion coatings and metal films. Since solid-film lubricants often suffer from poor wear resistance and inabihty to self-heal any breaks in the film, search continues for improved compositions. 

Titanium as a carrier metal Titanium (or a similar metal such as tantalum, etc.) cannot work directly as anode because a semiconducting oxide layer inhibits any electron transport in anodic direction ( valve metal ). But coated with an electrocatalytic layer, for example, of platinum or of metal oxides (see below), it is an interesting carrier metal due to the excellent corrosion stability in aqueous media, caused by the self-healing passivation layer (e.g. stability against chlorine in the large scale industrial application of Dimension Stable Anodes DSA , see below). 

Emerging Concepts in Interfacial Chemistry of Hybrid Materials Nanocontainer-Based Self-Healing Coatings... 

Another approach for hybrid self-healing coatings is based on the use of chemical inhibitors that can be released from the coating system. However, the direct introduction of inhibitor components to the protective coatings very often leads to deactivation of a corrosion inhibitor and degradation of the polymer matrix.6 To avoid this drawback, research activities have been shifted to the development of containers that can... 

SELF-HEALING MULTICOMPONENT COATINGS WITH pH-TRIGGERED INHIBITOR RELEASE... 

Self-Healing Multicomponent Coatings with pH-Triggered Inhibitor Release 643... 

An additional experiment was performed for the two films that stayed intact during the experiments described in the previous paragraph in order to provide evidence of the self-healing effect of nanoreservoirs added to the coating. The nondoped and the nanocontainer-doped sol-gel films were removed from the NaCl bath after the above indicated storage period, defects were made artificially into the films in order to... 

Self-Healing Multicomponent Coatings with Light-Induced Inhibitor Release 649... 

A simple cell, termed the simulated scratch cell, has been devised that can check for the key elements in the self-healing of CCCs (59). This cell, shown in Fig. 19, consists of two metal surfaces, normally several square centimeters in area, opposing one another and separated by several millimeters. One metal surface is conversion coated, while the other is left bare to simulate a defect or... 

Evidence for self-healing is not detected in identical experiments with lanthanum sealed hydrotalcite coatings. La does not have a soluble tetravalent oxide... 

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