Addition product, production and use thereof as corrosion inhibitor

Abstract

The invention relates to an addition product that can be produced from hexafluorosilicic acid, hexafluorotitanic acid, and/or hexafluorozirconic acid by an acid-base reaction with one or several organic bases and a method for production and use thereof. The addition products according to the invention guarantee a rapid and lasting inhibition of corrosion processes; they are in particular suitable for inhibiting the corrosion of light metals.

1 . Addition product that can be produced from hexafluorosilicic acid and/or hexafluorotitanic acid and/or hexafluorozirconic acid by an acid-base reaction with one or several organic bases.  
     
     
         2 . Addition product according to  claim 1 , characterized in that the organic base is a heterocyclic compound.  
     
     
         3 . Addition product according to  claim 2 , characterized in that the organic base is selected from the group comprising 1,2,4-triazole, 1H-benzotriazole, benzothiazole, benzimidazole, benzoxazole, 2,2′-biquinoline, nitrone, 2,5-dimercapto-1,3,4-thiadiazole, and 2,9-dimethylphenanthroline, as well as derivatives of these parent substances.  
     
     
         4 . Addition product according to  claim 3 , characterized in that the organic base is selected from the group comprising 1H-benzotriazole, 5-methylbenzotriazole, 5-carboxybenzotriazole, benzothiazole, 2-alkylbenzothiazole, 2-mercaptobenzothiazole, 2-mercaptobenzothiazolesuccinic acid, benzimidazole, 2-alkylbenzimidazole, 2-(5-aminopentyl)benzimidazole,. benzoxazole, and 2-mercaptobenzoxazole.  
     
     
         5 . Addition product according to  claim 2 , characterized in that the organic base is selected from the group comprising phthalocyanine, chlorine, and porphyrin, as well as derivatives of these parent substances.  
     
     
         6 . Addition product according to claims  1  through  5 , characterized in that the organic base is a polymer with one or several basic groups.  
     
     
         7 . Composition containing one or several addition products according to one or several of claims  1  through  6  as well as one or several metal salts with the anions SiF 6   2− , TiF 6   2− , and/or ZrF 6   2− .  
     
     
         8 . Composition containing one or several addition products according to one or several of claims  1  through  6  as well as phosphates, borates, vanadates, molybdates, wolframates, and/or phosphonates.  
     
     
         9 . Method for the production of the addition product according to claims  1  through  6 , characterized in that hexafluorosilicic acid and/or hexafluorotitanic acid and/or hexafluorozirconic acid as well as one or several organic bases undergo an acid-base reaction.  
     
     
         10 . Use of an addition product according to claims  1  through  6  as a corrosion inhibitor.  
     
     
         11 . Use according to  claim 10 , characterized in that the. addition product is incorporated into one or several polymers.  
     
     
         12 . Use according to  claim 10  in conversion baths.  
     
     
         13 . Use according to  claim 11 , characterized in that the polymer is a lacquer, an adhesive, a primer, an embedding compound, a sealant, a paint, and/or an anti-corrosive primer.  
     
     
         14 . Use according to claims  10  through  13  for the protection of components made of copper-containing light metal alloys.  
     
     
         15 . Use according to claims  10  through  14  for the protection of components made of aluminum, magnesium, zinc, and/or alloys of these elements.  
     
     
         16 . Use according to  claim 15  in aircraft construction.  
     
     
         17 . Use according to claims  10  through  16  for the protection of components that are exposed to weathering.  
     
     
         18 . Component comprising a light metal and/or a light metal alloy as well as corrosion-inhibiting constituents, characterized in that the corrosion-inhibiting constituents comprise one or several bases, in particular according to claims  2  through  6 , that inhibit the cathodic partial reaction of corrosion processes on this component, whereby components that have been adhered with a composition containing a corrosion inhibitor are not claimed.