Aluminum alloy material and hydrogen embrittlement inhibitor for aluminum alloy materials

Abstract

An aluminum alloy material having an aluminum alloy composition of the aluminum alloy compositions (1) below.Aluminum alloy composition (1)0.30 mass% or less of Si, more than 0.35 mass% of Fe, 0.20 mass% or less of Cu, 0.20 to 0.70 mass% of Mn, 1.0 to 2.0 mass% of Mg, 0.30 mass% or less of Cr, 4.0 to 5.0 mass% of Zn, 0.10 mass% or less of V, 0.25 mass% or less of Zr, and 0.20 mass% or less of Ti, while additionally containing Al.

1 . An aluminum alloy material which has an aluminum alloy composition of any one of aluminum alloy compositions (1) to (7) below.
 Aluminum alloy composition (1) 
 0.30 mass% or less of Si, more than 0.35 mass% of Fe, 0.20 mass% or less of Cu, 0.20 to 0.70 mass% of Mn, 1.0 to 2.0 mass% of Mg, 0.30 mass% or less of Cr, 4.0 to 5.0 mass% of Zn, 0.10 mass% or less of V, 0.25 mass% or less of Zr, and 0.20 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (2)
 0.12 mass% or less of Si, more than 0.15 mass% of Fe, 1.5 to 2.0 mass% of Cu, 0.10 mass% or less of Mn, 2.1 to 2.6 mass% of Mg, 0.05 mass% or less of Cr, 5.7 to 6.7 mass% of Zn, 0.05 mass% or less of Ni, 0.10 to 0.16 mass% of Zr, and 0.06 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (3)
 0.12 mass% or less of Si, more than 0.25 mass% of Fe, 2.0 to 2.6 mass% of Cu, 0.10 mass% or less of Mn, 1.9 to 2.6 mass% of Mg, 0.04 mass% or less of Cr, 5.7 to 6.7 mass% of Zn, 0.08 to 0.15 mass% of Zr, and 0.06 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (4)
 0.40 mass% or less of Si, more than 0.50 mass% of Fe, 1.2 to 2.0 mass% of Cu, 0.30 mass% or less of Mn, 2.1 to 2.9 mass% of Mg, 0.18 to 0.26 mass% of Cr, 5.1 to 6.1 mass% of Zn, and 0.20 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (5)
 More than 0.7 mass% of Si+Fe, 0.10 mass% or less of Cu, 0.10 mass% or less of Mn, 0.10 mass% or less of Mg, and 0.8 to 1.3 mass% of Zn, while additionally containing Al. 
   Aluminum alloy composition (6)
 0.12 mass% or less of Si, more than 0.12 mass% of Fe, 2.0 to 2.6 mass% of Cu, 0.06 mass% or less of Mn, 1.9 to 2.6 mass% of Mg, 0.04 mass% or less of Cr, 5.7 to 6.7 mass% of Zn, 0.08 to 0.15 mass% of Zr, and 0.05 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (7)
 0.40 mass% or less of Si, more than 0.50 mass% of Fe, 1.6 to 2.4 mass% of Cu, 0.30 mass% or less of Mn, 2.4 to 3.1 mass% of Mg, 0.18 to 0.28 mass% of Cr, 6.3 to 7.3 mass% of Zn, and 0.20 mass% or less of Ti, while additionally containing Al. 
   
     
     
         2 . The aluminum alloy material set forth in  claim 1  in which the aluminum alloy composition is aluminum alloy composition (3). 
     
     
         3 . The aluminum alloy material set forth in  claim 1 , which includes second phase particles having a higher hydrogen trapping energy than that of a semi-coherent precipitate interface. 
     
     
         4 . The aluminum alloy material set forth in  claim 3 , wherein the second phase particles are Al 7 Cu 2 Fe particles. 
     
     
         5 . A hydrogen embrittlement inhibitor for aluminum alloy materials, which comprises Al 7 Cu 2 Fe particles and can prevent hydrogen embrittlement of aluminum alloy materials. 
     
     
         6 . The hydrogen embrittlement inhibitor set forth in  claim 5 , which can prevent hydrogen embrittlement of an aluminum alloy material having aluminum alloy composition (A) below. 
 Aluminum alloy composition (A)
 0.40 mass% or less of Si, 2.6 mass% or less of Cu, 0.70 mass% or less of Mn, 3.1 mass% or less of Mg, 0.30 mass% or less of Cr, 7.3 mass% or less of Zn, and 0.20 mass% or less of Ti, while additionally containing Fe and Al. 
   
     
     
         7 . The hydrogen embrittlement inhibitor set forth in  claim 5 , which can prevent hydrogen embrittlement of an aluminum alloy material having any one of aluminum alloy compositions (1) to (7) below.
 Aluminum alloy composition (1)
 0.30 mass% or less of Si, more than 0.35 mass% of Fe, 0.20 mass% or less of Cu, 0.20 to 0.70 mass% of Mn, 1.0 to 2.0 mass% of Mg, 0.30 mass% or less of Cr, 4.0 to 5.0 mass% of Zn, 0.10 mass% or less of V, 0.25 mass% or less of Zr, and 0.20 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (2)
 0.12 mass% or less of Si, more than 0.15 mass% of Fe, 1.5 to 2.0 mass% of Cu, 0.10 mass% or less of Mn, 2.1 to 2.6 mass% of Mg, 0.05 mass% or less of Cr, 5.7 to 6.7 mass% of Zn, 0.05 mass% or less of Ni, 0.10 to 0.16 mass% of Zr, and 0.06 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (3)
 0.12 mass% or less of Si, more than 0.25 mass% of Fe, 2.0 to 2.6 mass% of Cu, 0.10 mass% or less of Mn, 1.9 to 2.6 mass% of Mg, 0.04 mass% or less of Cr, 5.7 to 6.7 mass% of Zn, 0.08 to 0.15 mass% of Zr, and 0.06 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (4)
 0.40 mass% or less of Si, more than 0.50 mass% of Fe, 1.2 to 2.0 mass% of Cu, 0.30 mass% or less of Mn, 2.1 to 2.9 mass% of Mg, 0.18 to 0.26 mass% of Cr, 5.1 to 6.1 mass% of Zn, and 0.20 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (5)
 More than 0.7 mass% of Si+Fe, 0.10 mass% or less of Cu, 0.10 mass% or less of Mn, 0.10 mass% or less of Mg, and 0.8 to 1.3 mass% of Zn, while additionally containing Al. 
   Aluminum alloy composition (6)
 0.12 mass% or less of Si, more than 0.12 mass% of Fe, 2.0 to 2.6 mass% of Cu, 0.06 mass% or less of Mn, 1.9 to 2.6 mass% of Mg, 0.04 mass% or less of Cr, 5.7 to 6.7 mass% of Zn, 0.08 to 0.15 mass% of Zr, and 0.05 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (7)
 0.40 mass% or less of Si, more than 0.50 mass% of Fe, 1.6 to 2.4 mass% of Cu, 0.30 mass% or less of Mn, 2.4 to 3.1 mass% of Mg, 0.18 to 0.28 mass% of Cr, 6.3 to 7.3 mass% of Zn, and 0.20 mass% or less of Ti, while additionally containing Al. 
   
     
     
         8 . The hydrogen embrittlement inhibitor set forth in  claim 5 , which can prevent hydrogen embrittlement of an aluminum alloy material having any one of aluminum alloy compositions (A1) to (A7) below.
 Aluminum alloy composition (A1)
 0.30 mass% or less of Si, 0.35 mass% or less of Fe, 0.20 mass% or less of Cu, 0.20 to 0.70 mass% of Mn, 1.0 to 2.0 mass% of Mg, 0.30 mass% or less of Cr, 4.0 to 5.0 mass% of Zn, 0.10 mass% or less of V, 0.25 mass% or less of Zr, and 0.20 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (A2)
 0.12 mass% or less of Si, 0.15 mass% or less of Fe, 1.5 to 2.0 mass% of Cu, 0.10 mass% or less of Mn, 2.1 to 2.6 mass% of Mg, 0.05 mass% or less of Cr, 5.7 to 6.7 mass% of Zn, 0.05 mass% or less of Ni, 0.10 to 0.16 mass% of Zr, and 0.06 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (A3)
 0.12 mass% or less of Si, 0.15 mass% or less of Fe, 2.0 to 2.6 mass% of Cu, 0.10 mass% or less of Mn, 1.9 to 2.6 mass% of Mg, 0.04 mass% or less of Cr, 5.7 to 6.7 mass% of Zn, 0.08 to 0.15 mass% of Zr, and 0.06 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (A4)
 0.40 mass% or less of Si, 0.50 mass% or less of Fe, 1.2 to 2.0 mass% of Cu, 0.30 mass% or less of Mn, 2.1 to 2.9 mass% of Mg, 0.18 to 0.26 mass% of Cr, 5.1 to 6.1 mass% of Zn, and 0.20 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (A5)
 0.7 mass% or less of Si+Fe, 0.10 mass% or less of Cu, 0.10 mass% or less of Mn, 0.10 mass% or less of Mg, and 0.8 to 1.3 mass% of Zn, while additionally containing Al. 
   Aluminum alloy composition (A6)
 0.12 mass% or less of Si, 0.12 mass% or less of Fe, 2.0 to 2.6 mass% of Cu, 0.06 mass% or less of Mn, 1.9 to 2.6 mass% of Mg, 0.04 mass% or less of Cr, 5.7 to 6.7 mass% of Zn, 0.08 to 0.15 mass% of Zr, and 0.05 mass% or less of Ti, while additionally containing Al. 
   Aluminum alloy composition (A7)
 0.40 mass% or less of Si, 0.50 mass% or less of Fe, 1.6 to 2.4 mass% of Cu, 0.30 mass% or less of Mn, 2.4 to 3.1 mass% of Mg, 0.18 to 0.28 mass% of Cr, 6.3 to 7.3 mass% of Zn, and 0.20 mass% or less of Ti, while additionally containing Al.