Antirust agent

Abstract

The present invention provides a corrosion inhibitor for preventing rusting of metallic members during long-term storage thereof while maintaining cleanness of surfaces of the metallic members, as well as a corrosion inhibiting method. The invention provides a corrosion inhibitor containing a hydroxylamine compound represented by formula (1): (wherein each of R 1 , R 2 , and R 3 represents a hydrogen atom, a C1 to C6 alkyl group, or a C2 to C4 alkenyl group, and each of these groups may have a substituent), or a hydrazine compound represented by formula (2): (wherein each of R 1 , R 2 , R 3 , and R 4 represents a hydrogen atom, a C1 to C6 alkyl group, or a C2 to C4 alkenyl group, and each of these groups may have a substituent) and a water-absorbable resin; the corrosion inhibitor wrapped in a gas-permeable material; and a method of inhibiting corrosion characterized by including maintaining a metallic member in a gas barrier container in the presence of the wrapped corrosion inhibitor.

1 . A corrosion inhibitor comprising a hydroxylamine compound represented by formula (1): 
       
         
           
           
               
               
           
         
       
       (wherein each of R 1 , R 2 , and R 3  represents a hydrogen atom, a C1 to C6 alkyl group, or a C2 to C4 alkenyl group, and each of these groups may have a substituent), or a hydrazine compound represented by formula (2): 
       
         
           
           
               
               
           
         
       
       (wherein each of R 1 , R 2 , R 3 , and R 4  represents a hydrogen atom, a C1 to C6 alkyl group, or a C2 to C4 alkenyl group, and each of these groups may have a substituent) and a water-absorbable resin. 
     
     
         2 . The corrosion inhibitor as described in  claim 1 , wherein the compound represented by formula (1) is hydroxylamine or N,N-diethylhydroxylamine. 
     
     
         3 . The corrosion inhibitor as described in  claim 1 , wherein the compound represented by formula (2) is at least one species selected from among hydrazine, methylhydrazine, ethylhydrazine, 1,1- or 1,2-dimethylhydrazine, and 1,1- or 1,2-diethylhydrazine. 
     
     
         4 . The corrosion inhibitor as described in  claim 1 , which further contains a C3 to C10 acetylene alcohol. 
     
     
         5 . The corrosion inhibitor as described in  claim 4 , wherein the acetylene alcohol is at least one species selected from among 3-methyl-1-pentyn-3-ol, 3-methyl-1-butyn-3-ol, 3,5-dimethyl-1-hexyn-3-ol, and 1-ethynylcyclohexanol. 
     
     
         6 . The corrosion inhibitor as described in  claim 1 , wherein the water-absorbable resin is a hardened resin obtained through reaction between a hydrophilic epoxy resin (a) having two or more epoxy groups in a molecule thereof and an amine compound (b) having two or more primary or secondary amine groups in a molecule thereof. 
     
     
         7 . The corrosion inhibitor as described in  claim 6 , wherein the epoxy resin (a) is at least one species selected from the group consisting of polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, glycerol polyglycidyl ether, and polyglycerol polyglycidyl ether. 
     
     
         8 . The corrosion inhibitor as described in  claim 6 , wherein the amine compound (b) is at least one species selected from the group consisting of polyethylenediamine, polyether-diamine, xylylenediamine, bis(aminomethyl)cyclohexane, and isophoronediamine. 
     
     
         9 . A package product comprising a corrosion inhibitor as recited in  claim 1  and a gas-permeable material which wraps the corrosion inhibitor. 
     
     
         10 . A method of inhibiting corrosion, comprising maintaining a metallic member in a gas barrier container in the presence of the corrosion inhibitor as described in  claim 1 . 
     
     
         11 . The corrosion inhibitor as described in  claim 2 , wherein the compound represented by formula (2) is at least one species selected from among hydrazine, methylhydrazine, ethylhydrazine, 1,1- or 1,2-dimethylhydrazine, and 1,1- or 1,2-diethylhydrazine. 
     
     
         12 . The corrosion inhibitor as described in  claim 11 , which further contains a C3 to C10 acetylene alcohol. 
     
     
         13 . The corrosion inhibitor as described in  claim 12 , wherein the acetylene alcohol is at least one species selected from among 3-methyl-1-pentyn-3-ol, 3-methyl-1-butyn-3-ol, 3,5-dimethyl-1-hexyn-3-ol, and 1-ethynylcyclohexanol. 
     
     
         14 . The corrosion inhibitor as described in  claim 7 , wherein the amine compound (b) is at least one species selected from the group consisting of polyethylenediamine, polyether-diamine, xylylenediamine, bis(aminomethyl)cyclohexane, and isophoronediamine. 
     
     
         15 . A package product comprising a corrosion inhibitor as recited in  claim 11  and a gas-permeable material which wraps the corrosion inhibitor. 
     
     
         16 . A package product comprising a corrosion inhibitor as recited in  claim 4  and a gas-permeable material which wraps the corrosion inhibitor. 
     
     
         17 . A method of inhibiting corrosion, comprising maintaining a metallic member in a gas barrier container in the presence of the corrosion inhibitor as described in  claim 11 . 
     
     
         18 . A method of inhibiting corrosion, comprising maintaining a metallic member in a gas barrier container in the presence of the corrosion inhibitor as described in  claim 4 .