Abstract: An aluminum alloy-made connector capable of preventing corrosion in a desired region even when being caulking-jointed to a piping member, a piping member for connecting a heat exchanger including the connector, and methods for manufacturing these are provided. The aluminum alloy-made connector is configured by an aluminum alloy extrusion material containing 0.2% to 0.8% (mass %, the same shall apply hereinafter) of Si, 0.45% to 0.9% of Mg, xZn% of Zn, and 0.001% to 0.2% of Ti, with the balance being Al and inevitable impurities. Herein, xZn satisfies {(X2+2r2)1/2+34}/38?xZn?2.0 (when the piping member is made of an Al—Mg—Si based aluminum alloy) or {(X2+2r2)1/2+16}/24?xZn?2.0 (when the piping member is made of an Al—Mn based aluminum alloy). Provided that, in the formula, X is the distance (mm) from the caulking jointed connector to the length-direction end portion of the region requiring corrosion prevention, and r is the radius (mm) corresponding to the external diameter of the piping member.

Abstract: An aluminum alloy connector which is excellent in extrusion property and sacrificial anode property, the connector being extruded in a hollow shape from an aluminum alloy extrusion material consisting of 0.2 to 0.8% (hereinafter, “%” means “mass %”) of Si, 0.45 to 0.9% of Mg, 1.0 to 3.5% of Zn, 0.001 to 0.2% of Ti and the balance of Al plus unavoidable impurities. An electric potential of said aluminum alloy extrusion connector is lower than an electric potential of a pipe member made of an Al—Mg—Si series alloy or an Al—Mn series alloy which is to be swaged to the connector, by 100 mV or more.

Abstract: An aluminum alloy connector which is excellent in extrusion property and sacrificial anode property, the connector being extruded in a hollow shape from an aluminum alloy extrusion material consisting of 0.2 to 0.8% (hereinafter, “%” means “mass %”) of Si, 0.45 to 0.9% of Mg, 1.0 to 3.5% of Zn, 0.001 to 0.2% of Ti and the balance of Al plus unavoidable impurities. An electric potential of said aluminum alloy extrusion connector is lower than an electric potential of a pipe member made of an Al—Mg—Si series alloy or an Al—Mn series alloy which is to be swaged to the connector, by 100 mV or more.

Abstract: An aluminum alloy extrusion material for a connector which is excellent in extrusion property and sacrificial anode property consists of 0.2 to 0.8% (hereinafter, “%” means “mass %”) of Si, 0.45 to 0.9% of Mg, 1.0 to 3.5% of Zn, 0.001 to 0.2% of Ti and the balance of Al plus unavoidable impurities.