Teck Cominco Metals Ltd.

Cominco, Ltd.

Victor M Duarte

John Zervoudis

Graham W Poag

Michael Gilles

Richard Sokolowski

Gary R Adams

A process and an alloy for galvanizing non-reactive steel and mixed or moderately reactive steel for providing a decorative spangle to the galvanized coating. The alloy contains 0.1 to less than 0.8 wt % tin, 0.05 to 0.2 wt % bismuth, 0.001 to 0.008 wt % aluminum, and optionally 0 to 0.1 wt % nickel, the balance zinc of commercial purity.

Process and alloy for decorative galvanizing of steel

An alloy for galvanizing steel comprises, by weight, aluminum in the amount of at least 0.001% to 0.007%, preferably 0.002 to 0.004%, tin in the amount of at least 0.5% to a maximum of 2%, preferably at least 0.8%, and one of an element selected from the group consisting of vanadium in the amount of at least 0.02%, preferably 0.05% to 0.12%, titanium in the amount of at least 0.03%, preferably 0.06% to 0.10%, and both vanadium and titanium together in the amount of at least 0.02% vanadium and at least 0.01% titanium for a total of at least 0.03%, preferably 0.05% to 0.15%, the balance zinc containing up to 1.3 wt. % lead. In another embodiment, the alloy comprises, by weight, aluminum in the amount of at least 0.001%, tin in the amount of 0.5% to 2%, and vanadium and nickel together in the amount of at least 0.02% vanadium and at least 0.02% nickel to a maximum of 0.15% vanadium and nickel collectively. Titanium may be added in an amount, by weight, of at least 0.01% titanium to a collective maximum of 0.2% vanadium, nickel and titanium. In a further embodiment, the alloy comprises, by weight, aluminum in the amount of at least 0.001%, tin in the amount of about 0.5% to about 2%, vanadium in the amount of 0.02 to 0.12%, and bismuth in the amount of 0.05% to 0.1%, the balance zinc containing up to 1.3 wt. % lead.

Galvanizing of reactive steels

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Hamilton, Canada

Victor M Duarte