Metal schema

Figure 1 Schema of an electrochemical cell. The polymer is a film deposited on the metal working electrode.

Palladium + 2. Platinmetall Pt (Rh, Ru, Os. Ir) /Pd/C (Pt-Metall Pd = 2 98) 1-3 20-70 alle mit Pd durchfuhrbaren Hydrierungen u. Hydrogen-olysen bei erhohter Substrat- und Reaktionsspczifitat in Abhangig-keit vom beigemischten Metall, kein erkennbarcs Schema... 

Just as the atom takes on a significance in learning about chemistry which is not justified in terms of the (lack of) role that discrete atoms play in chemical processes, once learners have been taught about molecules there is a tendency to apply the molecule schema to all structures. The role of valency in limiting, if not exactly determining, molecular formulae, may be extended to metals and to ionic materials. Metals may be seen by students to consist of discrete molecules of similar atoms, in a similar way to iodine or phosphoms. In the ionic case, valency is seen by many students to indicate the number of ionic bonds that can be formed, and not just the charge on the ions. 

Fig. 1.15. Anticorrosion schema of metal articles based on plastics containing volatile (a) and contact (b) CL (1) metal article, (2) corrosive medinm, (3) plastics, (4) inhibitor, (5) inhibitor s adsorption layer, (6) vapor flow of the inhibitor desorbed from the article surface...

Corrosion protection of metal ware by plastics containing contact inhibitors can be exercised according to the schema in Fig. 1.15, b. An anticorrosion plastic element 3 contains an inhibitor in the polymer matrix micropores. Element 3 contacts the protected metal surface 1. Corrosive medium 2 penetrates into the contact gaps and wets the article surface. Corrosion inhibitor 4 either spontaneously or under some effect, e.g. of mechanical forces, releases from the micropores of the polymer matrix into the contact gaps and adsorbs on the metal article surface. In case of mutual displacement of the contacting article 1 and element 3, spreading of the adsorption layer over the article surface is accelerated. 

Schema 8.1 Electrochemical fabrication of nanosized transition metal colloids (the stabilizer is usually a tetraalkylammonium salt) [25],...

Metallfreie polymere Phthalocyanine werden auf verschiedenen We-gen erhalten. So fuhrt das Erhitzen des NH3- oder Methanol-Anlage-rungsproduktes an TCB auf 300 C zum Ziel (179). Bd dem NH3-Anlagerungsprodukt wird es sich wahrschdnlich um das Bis(Amino-iminoisoindolenin) (69) handeln. Weiter kann man durch Umfallen der Ca- und Mg-haltigen polymeren Phthalocyanine aus H2SO4 das metall-freie polymere Phthalocyanin darstellen (Schema XXXII) (197,194,201). 

It is seen that adhesion increases from 1 (very poor) up to 5 relative units (good), value 3 corresponds to a valid level. The similar outcomes manage to be received, skipping a film of polymer between two metal electrodes, to what the alternating current by power 8-20 kV is brought. The schema of installation for treatment by electric discharge is given at a fig. 12. 

Fig. I. Schema of the d-band structure for (a) pure metals and (b) R-Co intermetallics.

Figure 3-3 Schema of low temperature type thick film metallization of alumina substrates (1) Frit bond type and (2) chemical bond type.

Reactive schemas on contact between metal and plasma... 

The reactive schema chosen in section 7.1 is not imique. If we again accept the adsorption-desorption metal-interface reaction e S eS and the reaction A A +e in the gaseous phase, we can also consider in the sheath of potential the other reactive schemas 2) to 4) in Table 7.1, to which, in each case, we need to add the reaction of adsorption of the electrons e+S eS [PRUSla] (see Figure 7.4). 

---