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    STUDIA CHEMIA - Issue no. 1 / 2010  
         
  Article:   Zn-Ni ALLOY COATINGS FROM ALKALINE BATH CONTAINING TRIETHANOLAMINE. INFLUENCE OF ADDITIVES.

Authors:  LIANA MARIA MUREȘAN, JULIEN EYMARD, DIANA BLEJAN, EMIL INDREA. 		 
       
         
  Abstract:  The Zn-Ni alloys have been electrodeposited from an alkaline bath containing triethanolamine as complexing agent for Ni2+ ions. Polyethyleneglicol (PEG), in combination with either coumarin, piperonal or vanillin have been tested as brightening agents. Their effect on the codeposition process and on the corrosion resistance of the resulted coatings was investigated. Under the examined conditions, the electrodeposition was of anomalous type. The effect of plating bath conditions on the corrosion resistance was studied by Tafel polarization measurements. It was found that the tested compounds had a beneficial effect both on deposits quality and on their corrosion resistance.

Keywords: zinc - nickel alloys, electrodeposition, corrosion, triethanolamine
  
         
     
         
         
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