Adhesive zinc foil

Thermally sprayed soluble coatings of zinc or aluminium (or their aUoys) are also used. Practical experience exists in the USA, among others, on bridges. Another sacrificial system is based on a zinc foil attached to the concrete surface via an ion-conducting gel adhesive [52-54]. Sacrificial CP systems have obvious advantages of simplicity and ease of application the main questions concern their effective service life. 

Ziac foil coated with a conductive, pressure-sensitive adhesive is used for repair of other ziac coatings or for imparting corrosion resistance at field sites. The 0.08-mm ziac tape or sheet has a 0.025-mm coaductive adhesive. The laminate is cut to size and pressed tightly to activate the adhesive. Conductive tape can be wrapped around pipe, especially around welds or connections. The corrosion resistance of this material is iatermediate between galvanized or thermally sprayed coatings and zinc-filled paints (21,50). 

In the processes under consideration, the adhesive forces of the developer powder have been increased principally by charging the contiguous bodies, i.e., as a result of electrical forces. The same sort of effect can be achieved by adjusting the wettability of the surface (see Chapter II). For this purpose, panchromat-ically sensitized zinc oxide deposited on aluminum foil is used as the photocon-... 

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