Single-layer inhibited films

Modifications of the method for the single-layer inhibited films are illustrated in Fig. 2.5 [3,59]. 

Single-layer inhibited films can neither present a insurmountable barrier to diffusive permeation of corrosion-active agents from the outside, nor they can avert infiltration and condensation of water vapor on the metal surface, but are able to hamper the removal of ion products from the zone of electrochemical reactions. The corrosion protection barrier factor is drastically improved in multilayered film materials. 

Fig. 2.5. Production diagrams of single-layer inhibited polymer films (a) joint extrusion of polymers and Cl (b) film saturation with Cl in a gaseous phase ...

In any case, single-layer inhibited pol mier films cannot substantially restrict the rate of corrosion processes by limiting their vapor or oxygen-penetrability. This becomes especially clear in comparison with the mean rate of steel corrosion in atmosphere (1.9g/(m days) [112]). The amounts of water and oxygen needed for the corrosion process to run at the indicated rate calculated by the equation... 

Water and oxygen penetrate through the majority of single-layer inhibited pol uner films in amounts sufficient for corrosion generation at a rate almost similar to unprotected metal surfaces. 

According to their structural parameters the inhibited films are subdivided into single-layer and multilayered, when a few layers of one or different polymers are formed, and combined films that contain other materials along with the polymer film layers. 

To protect metal ware from external effects and mechanical damages they undergo preservation by packing into inhibited film materials inside which an atmosphere is created that averts corrosion. The requirements imposed on the preservation material depend upon the product to be protected therefore to create a single-layer film meeting all the requirements is in fact impossible. 

Fig. 2.3. Structure of inhibited polymer films (a) single-layered filled with solid Cl particles (b) with a layer of glued particles (c) with a porous layer impregnated with inhibited liquid (d) with a liquid Cl in the glued layer (e) with a liquid Cl between film layers (f) with Cl in the gaseous phase sealed between layers (g) with a layer foamed by an inhibited gas. (1) polymer base (2) Cl particles (3) porous layer (4) glued inhibited layer (5) gaseous pellet of Cl vapors (6) jelly layer with inhibited liquid...

Extrusion by pol3Tner hose blowing may produce both single-layer and multilayered inhibited films. It is highly productive, quiet simple and facilitates regulation of dimensions, structure, physical-mechanical and other characteristics of the film materials within a wide range. 

The method of casting solutions and polymer latexes, as well as application of polymer plastisols containing Cl on the forming substrate is used for the manufacture of both single-layer and multilayered inhibited films [3,4,23,25,41,43,53,84] as well as films with an adhesive layer [57,58]. 

D diamond nuclei and single-crystal growth. The high solubility/mobility of C in/ on the metals (Fe, Co, Ni), or the formation of an intermediate layer (carbides or graphite) may inhibit the possible development of an orientational, epitaxial relationship between diamond films and the substrates. 

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