SOLDERING COMPOSITIONS, FLUXES AND METHODS OF USE

摘要

: A zinc-based composition comprising, by weight: from about 0.1 to about 4 percent copper; from about 0.1 to about 1 percent nickel; from about 0.01 to less than 0.5 percent aluminum; 0 to about 0.5 percent chromium; 0 to about 0.5 percent titanium; and the remainder being zinc is provided. The composition is useful for coating or joining metal surfaces, particularly metals formed of or containing copper. The above composition may be used with or without a flux. Particularly beneficial results are obtained when a flux having a composition comprising, by weight: from about 5 to about 70 percent ZnC12; from about 1 to about 28 percent NH4Cl; from about 0.1 to about 10 percent SnC12; from about 0 to about 10 percent HCl; from about 0 to about 10 percent Li2B4O7; from about 0 to about 5 percent MgBr2; from about 0 to about 5 percent ZnBr2; and about 0 to about 94 percent water is used.