Aluminum alloy clad material and heat exchanger that includes tube obtained by forming the clad material

Abstract

An aluminum alloy clad material can produce a heat exchanger tube that exhibits excellent outer-side corrosion resistance when formed into a tube. The aluminum alloy clad material has a three-layer structure in which one side of a core material is clad with an inner cladding material, and the other side of the core material is clad with a sacrificial anode material, the core material being formed of an Al—Mn—Cu alloy that includes 0.6 to 2.0% of Mn and 0.03 to 1.0% of Cu, with the balance being aluminum and unavoidable impurities, the inner cladding material being formed of an Al—Mn—Cu alloy that includes 0.6 to 2.0% of Mn and 0.2 to 1.5% of Cu, with the balance being aluminum and unavoidable impurities, the sacrificial anode material being formed of an Al—Zn—Cu alloy that includes 0.5 to 6.0% of Zn and 0.03 to 0.3% of Cu, with the balance being aluminum and unavoidable impurities, and the relationship “Cu content (%) in sacrificial anode material≦Cu content (%) in core material≦Cu content (%) in inner cladding material” being satisfied. The aluminum alloy clad material may have a two-layer structure that includes the core material and the sacrificial anode material.

1 .- 10 . (canceled) 
     
     
         11 . An aluminum alloy clad material comprising a core material and a sacrificial anode material, one side of the core material being clad with the sacrificial anode material, the core material being formed of an Al—Mn—Cu alloy that comprises 0.6 to 2.0 mass % of Mn and 0.03 to 1.0 mass % of Cu, with the balance being aluminum and unavoidable impurities, the sacrificial anode material being formed of an Al—Zn—Cu alloy that comprises 0.5 to 6.0 mass % of Zn and 0.03 to 0.3 mass % of Cu, with the balance being aluminum and unavoidable impurities, and a relationship of Cu content (mass %) in sacrificial anode material≦Cu content (mass %) in core material being satisfied. 
     
     
         12 . The aluminum alloy clad material according to  claim 11 , wherein the core material further comprises one or more of 0.01 to 0.3 mass % of Ti, 1.5 mass % or less of Si and 0.7 mass % or less of Fe. 
     
     
         13 . The aluminum alloy clad material according to  claim 11 , wherein the sacrificial anode material further comprises one or more of 1.5 mass % or less of Si, 0.7 mass % or less of Fe, and 1.5 mass % or less of Mn. 
     
     
         14 . The aluminum alloy clad material according to  claim 12 , wherein the sacrificial anode material further comprises one or more of 1.5 mass % or less of Si, 0.7 mass % or less of Fe, and 1.5 mass % or less of Mn. 
     
     
         15 . An aluminum alloy clad material comprising a core material, an inner cladding material, and a sacrificial anode material, one side of the core material being clad with the inner cladding material, the other side of the core material being clad with the sacrificial anode material, the core material being formed of an Al—Mn—Cu alloy that comprises 0.6 to 2.0 mass % of Mn and 0.03 to 1.0 mass % of Cu, with the balance being aluminum and unavoidable impurities, the inner cladding material being formed of an Al—Mn—Cu alloy that comprises 0.6 to 2.0 mass % of Mn and 0.2 to 1.5 mass % of Cu, with the balance being aluminum and unavoidable impurities, the sacrificial anode material being formed of an Al—Zn—Cu alloy that comprises 0.5 to 6.0 mass % of Zn and 0.03 to 0.3 mass % of Cu, with the balance being aluminum and unavoidable impurities, and a relationship of Cu content (mass %) in sacrificial anode material≦Cu content (mass %) in core material≦Cu content (mass %) in inner cladding material being satisfied. 
     
     
         16 . The aluminum alloy clad material according to  claim 15 , wherein the core material further comprises one or more of 0.01 to 0.3 mass % of Ti, 1.5 mass % or less of Si and 0.7 mass % or less of Fe. 
     
     
         17 . The aluminum alloy clad material according to  claim 15 , wherein the inner cladding material further comprises one or more of 0.01 to 0.3 mass % of Ti, 1.5 mass % or less of Si and 0.7 mass % or less of Fe. 
     
     
         18 . The aluminum alloy clad material according to  claim 16 , wherein the inner cladding material further comprises one or more of 0.01 to 0.3 mass % of Ti, 1.5 mass % or less of Si and 0.7 mass % or less of Fe. 
     
     
         19 . The aluminum alloy clad material according to  claim 15 , wherein the sacrificial anode material further comprises one or more of 1.5 mass % or less of Si, 0.7 mass % or less of Fe, and 1.5 mass % or less of Mn. 
     
     
         20 . The aluminum alloy clad material according to  claim 16 , wherein the sacrificial anode material further comprises one or more of 1.5 mass % or less of Si, 0.7 mass % or less of Fe, and 1.5 mass % or less of Mn. 
     
     
         21 . The aluminum alloy clad material according to  claim 17 , wherein the sacrificial anode material further comprises one or more of 1.5 mass % or less of Si, 0.7 mass % or less of Fe, and 1.5 mass % or less of Mn. 
     
     
         22 . The aluminum alloy clad material according to  claim 18 , wherein the sacrificial anode material further comprises one or more of 1.5 mass % or less of Si, 0.7 mass % or less of Fe, and 1.5 mass % or less of Mn. 
     
     
         23 . A heat exchanger produced by forming the aluminum alloy clad material according to  claim 11  into a tube so that the inner cladding material defines a refrigerant passage, and the sacrificial anode material comes in contact with the atmosphere, assembling an aluminum fin with the tube, and brazing the aluminum fin and the tube. 
     
     
         24 . A heat exchanger produced by forming the aluminum alloy clad material according to  claim 13  into a tube so that the inner cladding material defines a refrigerant passage, and the sacrificial anode material comes in contact with the atmosphere, assembling an aluminum fin with the tube, and brazing the aluminum fin and the tube. 
     
     
         25 . A heat exchanger produced by forming the aluminum alloy clad material according to  claim 14  into a tube so that the inner cladding material defines a refrigerant passage, and the sacrificial anode material comes in contact with the atmosphere, assembling an aluminum fin with the tube, and brazing the aluminum fin and the tube. 
     
     
         26 . A heat exchanger produced by forming the aluminum alloy clad material according to  claim 15  into a tube so that the inner cladding material defines a refrigerant passage, and the sacrificial anode material comes in contact with the atmosphere, assembling an aluminum fin with the tube, and brazing the aluminum fin and the tube. 
     
     
         27 . A heat exchanger produced by forming the aluminum alloy clad material according to  claim 21  into a tube so that the inner cladding material defines a refrigerant passage, and the sacrificial anode material comes in contact with the atmosphere, assembling an aluminum fin with the tube, and brazing the aluminum fin and the tube. 
     
     
         28 . A heat exchanger produced by forming the aluminum alloy clad material according to  claim 22  into a tube so that the inner cladding material defines a refrigerant passage, and the sacrificial anode material comes in contact with the atmosphere, assembling an aluminum fin with the tube, and brazing the aluminum fin and the tube.