| In Europe, for zinc-coated plates, mostly in car industry, it is used either MIG pulse with CuSi3 wire or even very expensive CMT (I guess with zinc based wire). Both CuSi3 and zinc based are non-corrosive and there is no need for re-coating with zinc. But, for other application it is used ER70S-3 (as said above) in Ar+18%CO2, but they apply zinc later over weld seam, either zinc itself or some paint containing zinc. It is a matter of cost analyse, to sum all costs and to find the best solution. |
