Abstract
This paper deals with the welding properties of semi-automatic arc welding for hot dip galvanizing rebar to discuss the applicability of hot dip galvanizing steel to concrete rebar. The concrete rebar has many projection points to assure its adhesive property with concrete. The influence of these projections at the flare groove joint arrangement on the weldability of semi-automatic arc welding has been mainly investigated. As a result, the suitable combination of shielding gas and electrode wire on flare groove joint which shows less cavity formation and high joint shear strength has been made clear.
