Highly malleable, ductile zinc strip

Abstract

The present invention refers to a zinc strip comprising zinc as main component, wherein titanium and aluminium are alloyed together with the zinc. The obtained zinc strip is highly malleable and at the same time ductile. The zinc strip is free of lead.

1 . Zinc strip comprising zinc as main component titanium, and aluminum, wherein an amount of titanium is 500 ppm or less, and the amount of aluminium is 100 ppm or less. 
     
     
         2 . Zinc strip according to  claim 1 , wherein the amount of titanium is at least 10 ppm, and the amount of aluminum is at least 10 ppm. 
     
     
         3 . Zinc strip according to  claim 2 , further comprising copper in an amount of 500 ppm or less. 
     
     
         4 . Zinc strip according to  claim 1 , wherein the zinc comprises impurities that include Pb, Cd, Fe, and/or Sn, wherein the total amount of impurities amount to 0.05% by weight or less based on the total weight of the zinc strip. 
     
     
         5 . Zinc strip according to  claim 1 , wherein the zinc is a high purity zinc according to classification Z1 of DIN EN 1179:2003. 
     
     
         6 . Zinc strip according to  claim 1 , wherein the amount of titanium is 300 ppm or less. 
     
     
         7 . Zinc strip according to  claim 1 , wherein the amount of aluminum is 50 ppm or less. 
     
     
         8 . Zinc strip according to  claim 3 , wherein the amount of copper is 300 ppm or less. 
     
     
         9 . Zinc strip according to  claim 1 , having a thickness of 0.1 mm to 2.5 mm. 
     
     
         10 . Zinc strip according to  claim 1 , said strip being coated with a colour. 
     
     
         11 . Zinc strip according to  claim 1 , said strip comprising an adhesive on one outer surface. 
     
     
         12 . A method of roofing comprising use of a zinc strip according to  claim 1  for sealing a dormer of a roof, transitions in a roof area, roof ridges, eaves, chimney or wall connection, skylights, or to connect roof gutters. 
     
     
         13 . Method to produce a zinc strip according to  claim 1  comprising:
 a) providing zinc plates based on zinc and further comprising titanium, and aluminum, wherein the amount of titanium is 500 ppm or less, the amount of aluminum is 100 ppm or less, 
 b) warming the plates to a temperature of about 100° C. or more and 
 c) rolling the plates. 
 
     
     
         14 . Method according to  claim 13 , wherein a number of rolling passes in step c) amounts to 10 or more. 
     
     
         15 . Method according to  claim 14 , wherein a discontinuous per pass reduction rate is obtained during the rolling process. 
     
     
         16 . Method according to  claim 13 , wherein the final temperature of the rolling process is about 50° C. or more.