Determination of Aluminum and Magnesium in Zinc-Base Die-Casting Alloys

The Mercury Cathode and its Applications.

“…Beakers of 150-1000 ml. capacity, containing as much as 200 g. of mercury, were used (2, 20,35,38,105,108,128,162) and batteries of them have been installed in some laboratories (74,121). The electrolyte is agitated either by rotation of the anode or by use of separate stirrers.…”

“…Smith and his students were the first to propose the rotating anode, with which increased efficiency of deposition was claimed (79, 80, 81). Its use became rather general (1, 5, 38, 83, 84, 105, 155) and where a stationary anode was used, agitation was accomplished by other mechanical means (24,35,66,111,135,148,170). Benner investigated the difference in rate of deposition with rotating and stationary anodes; he found that more rapid deposition is achieved by the former but he considered the gain more than offset by the simplicity and lower cost of the latter (12, 13).…”

“…Group I IB (Zn, Cd, Hg): Deposition of zinc as an amalgam was suggested by Gibbs (56) and by both Luckow (99) and Vortmann (166). The mercury cathode method is particularly suited for deposition of this metal (155, 170)-Sand considered the Paweck amalgam electrode to be the best means of deposition (144)-and considerable work has been done on both the quantitative determination of zinc (13,15,19,78,79,153,161) and in the field of separation (35,119,145,152). Bóttger recommends the addition of a small quantity of nickel amalgam before electrolysis, and of sodium acetate before breaking the current (18).…”

“…Group III A (B, Al, Ga, In, Tl): Of the four metals in this group, only aluminum is not deposited in the mercury cathode, and this has long served as the basis of a method for the separation of interfering elements from aluminum, both when the latter is present in large amounts or in micro-amounts (2,20,24,27,35,37,54,67,99,113,116,120,128,129,138,148,150,151,160,169).…”

Determination of Aluminum in Manganese and Aluminum Bronzes Using Mercury Cathode Cell

“…This paper describes a procedure that fills the above requirements. After a thorough search of the literature, it was decided that the mercury cathode cell (3,6, S, 9) would be best suited for the rapid and complete separation of iron, manganese, lead, zinc, nickel, and copper from aluminum.…”