Aluminum deposition

Fig. 7. Alloy composition versus (a) the shift in the aluminum deposition potential, AEai and (b) the shift in the copper/zinc deposition potential Ai cu,Zn, for the deposition of fee Cu-Al and hep Zn-Al alloys, calculated by using Eq. (12) and Eq. (13) and the free energy curves from Figure 6. Reproduced from Stafford et al. [104] by permission of The Electrochemical Society.

As shown in Figure 8, the calculated deposition potential for both hep Zn-Al and bet Sn-Al is negative of the aluminum deposition potential, which is consistent with the experimental data [84], The co-deposition potential observed for fee Ag-Al is significantly more positive than that predicted by this free energy analysis [88]. In this... 

Figure 22 shows two sets of polarization curves for aluminum deposition as a... 

The electrochemistry of Ti2+ in 66.7 m/o AlCl3-NaCl has been investigated wherein the electroactive Ti2+ was prepared by the oxidation of Ti metal with liquid A1C13 [176, 185] and by the electrochemical dissolution of titanium metal [120, 177], The authors of both studies concluded that Ti2+ may be oxidized stepwise to Ti3+ and Ti4+ and that both processes are reversible at platinum and tungsten electrodes. However, anomalous voltammetric behavior at high Ti2+ concentrations (greater than 50 mmol L ) suggests the formation of polymeric Ti2+ species in the melt. The reduction of Ti2+ to the metal was not observed at potentials more positive than that required for aluminum deposition. 

Sum and Skyllas-Kazacos [44] studied the deposition and dissolution of aluminum in an acidic cryolite melt. The graphite electrode was preconditioned (immersed in cryolite melt) to saturate the surface of the electrode in sodium before aluminum deposition could be observed. Current reversal chronoamperometry was used to measure the rate of aluminum dissolution in the acidic melt. Dissolution rate was mass transport controlled [45] and in the order of 0.8 10 7 and 1.8 10 7 molcm 2s 1 at 1030 °C and 980 °C respectively [44]. 

TFI) 1x/d hyperkeratosis, acanthosis, microabscesses aluminum deposition in keratin) AICI3... 

Eastwood JB, Levin GE, Pazianas M, et al. 1990. Aluminum deposition in bone after contamination of drinking water supply. Lancet 336 462-464. 

McNall AD, Fosmire GJ. 1996. Zinc status does not affect aluminum deposition in tissues of rats. Biol Trace Elem Res 53 7-18. 

Santos F, Chan JCM, Yang MS, et al. 1987. Aluminum deposition in the central nervous system. Preferential accumulation in the hippocampus in weanling rats. Med Biol 65 53-55. 

Yasui M, Yase Y, Ota K, et al. 1991. Aluminum deposition in the central nervous system of patients with amyotrophic lateral sclerosis from the Kii peninsula of Japan. Neurotoxicology 12 615-620. 

The aluminum deposition also induces dramatic changes in the... 

---