Inventors:
James E. McNutt - Wilmington DE
Robert J. Scott - Newark DE
Charles W. Welch - New Castle DE
Assignee:
E. I. Du Pont de Nemours and Company - Wilmington DE
International Classification:
B05D 304, B23K 3534
Abstract:
A flux bath and its use in treating ferrous articles prior to their being dipped in a molten aluminum-zinc alloy is disclosed. The flux may be molten bath or used as an aqueous solution which contains from 200 to 750 g/l dissolved solids. The dissolved solids are 91 to 98. 5 wt. % zinc chloride, 1. 5 to 9 wt. % ammonium chloride and, based on zinc chloride and ammonium chloride, from 0. 6 to 3 wt. % fluoride ions.