Abstract: Anode active materials comprising amalgamated zinc powder for use in cells, which may well achieve inhibition of corrosion of zinc with a smallest possible amount of mercury, may be produced by a process comprising atomizing a molten zinc added with mercury to obtain pre-amalgamated zinc powder and bringing thus obtained powder, which is dispersed in a liquid, into contact with mercury or an amalgam to further amalgamate said pre-amalgamated zinc powder.
Abstract: There is disclosed an alloy for use in a zinc galvanizing bath comprising zinc, aluminum and a rare earth-containing alloy such as mischmetal. According to the preferred embodiments, the alloy contains from about 85% to about 97% zinc, from about 3% to about 15% aluminum and from about 5 ppm to about 1.0% mischmetal. The alloy may also contain one or more of the elements Fe, Pb, Sb, Mg, Sn, Cu and Si.
Type:
Grant
Filed:
August 2, 1982
Date of Patent:
May 15, 1984
Assignee:
International Lead Zinc Research Organization, Inc.
Inventors:
Schrade F. Radtke, Dimitri Coutsouradis, Jacques Pelerin
Abstract: Process for adjusting the composition of a zinc alloy for the galvanization of steels, the alloy having a composition including the following components expressed in ppm (by weight): lead: 1,000 to 15,000, and as additives aluminium: 100 to 5,000, tin: 300 to 20,000, and magnesium: 10 to 1,000 and being deficient in at least one of said additives, said process comprising adding to the zinc alloy one or more metal compositions which are soluble in molten zinc and which contain a relatively high proportion of the additive in which the alloy is deficient, the amount of the or each metal composition being sufficient to compensate the deficit of the additive. The tin composition is virtually pure tin; the magnesium composition is a ternary alloy of zinc, magnesium (5,000 to 50,000 ppm) and aluminium (10 to 500 ppm); and the aluminium composition is a binary zinc/aluminium alloy containing about 5% of aluminium.
Abstract: An improved hot dip coating of the zinc aluminum type contains germanium (Ge). In Zn-10Al coatings the addition of 0.1-1.2 Ge weight percent increases the fluidity of the molten metal in the bath and thereby enables substantially thinner coatings having more refined phase structure. Silicon (Si) is found to exhibit an analogous effect, but it not as powerful as Ge. Improved coatings contain zinc, 7-17Al, and 0.1-3(Ge+Si), where Ge ranges from 0-1.2, all weight percent.
Abstract: Hot-dip galvanized steel sheet, wherein said coating layer is characterized by being highly resistant to flaking either in a high-temperature humid atmosphere or in long-term indoor aging. The coating comprises 0.1 to less than 0.2 wt % Al, 0.1-0.5 wt % Sb, the remainder being Zn and unavoidable impurities, the total of the unavoidable impurities other than Fe, namely Pb, Cd and Sn being less than 0.02 wt %, the ratio of Sb/Pb being 10-250, and the Al present in the coating layer being in the form of an Al-Sb eutectic.