Electrolyte for the galvanic deposition of aluminium from aprotic solvents in a plating barrel

An electrolyte and aprotic technology, which is applied in the fields of compounds containing group 3/13 elements of the periodic table, chemical instruments and methods, organic chemistry, etc., can solve problems such as deficiencies, and achieve high plating ability and uniform corrosion resistance.

Inactive Publication Date: 2009-11-04
ALUMINAL OBERFLACHENTECHN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This conductivity is insufficient for coating in coating drums

Method used

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  • Electrolyte for the galvanic deposition of aluminium from aprotic solvents in a plating barrel
  • Electrolyte for the galvanic deposition of aluminium from aprotic solvents in a plating barrel

Examples

Experimental program
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Embodiment

[0054] 1. Electrolyte Preparation

[0055] Tetraethylammonium chloride, which is commercially available as the monohydrate, was dried under vacuum. 1 mol of dried tetraethylammonium chloride was mixed with toluene so as to obtain a suspension. 2 mol (used neat or as a solution in toluene) of triethylaluminum were added dropwise to the suspension during cooling. The reaction mixture was stirred. Get N(C 2 h 5 ) 4 Cl 2Al(C 2 h 5 ) 3 • 2 Clear solutions in toluene. 2 mol of toluene was used as a solvent relative to the amount of tetraethylammonium chloride used. The resulting product was used as an electrolyte.

[0056] 2. The conductivity of the electrolyte of the present invention is compared to the conductivity of the prior art electrolyte

[0057] Sufficient conductivity of the electrolyte is an essential requirement for adequate coating, especially of small parts in coating drums. The conductivity of the electrolytes of the present invention is significantly high...

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Abstract

The invention relates to an electrolyte for the galvanic deposition of al uminium from aprotic solvents, said electrolyte containing a compound of for mula N(R1)4X.(m-n-o)AI (C2H5)3-n AIR2 3-o AIR3 3 (I), wherein R1 is a C1 to C4 alkyl group, X is equal to F, Cl or Br, m is equal to between 1 and 3, pr eferably between 1.7 and 2.3, n is equal to between 0.0 and 1.5, preferably 0.0 and 0.6, o is equal to between 0.0 and 1.5, preferably between 0.0 and 0 .6, and R2 and R3 are a C1 or C3 to C6 alkyl group, R2 differing from R3in a n organic solvent. The invention also relates to a method for producing the electrolyte, a coating method and the coated material parts.

Description

technical field [0001] The subject of the present invention is an electrolyte for the electrodeposition of aluminum from aprotic solvents, preferably for roller coating of the material. Further subjects of the invention are the method for producing the electrolyte, the use of the electrolyte, the coating method and the components coated with the method. Background technique [0002] It is known that the electrodeposition of aluminum is only possible from non-aqueous electrolytes, since this metal has a very low electrode potential. [0003] In principle, electrodeposition of aluminum is carried out in non-aqueous systems by using electrolytes containing organoalkylaluminum complexes dissolved in organic aprotic solvents. Coating is carried out in such a way that the material to be coated operates as a cathode in the electrolyte solution. In addition, the electrolyte solution contains an aluminum anode to provide the aluminum necessary for coating. When an electric current...

Claims

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Application Information

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IPC IPC(8): C25D3/44C07F5/06
CPCC07F5/062C25D3/44
Inventor H·德弗里斯M·黑特尔
Owner ALUMINAL OBERFLACHENTECHN
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