A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Obtaining decorative chromium plating from trivalent chromium solutions
The present work was aimed at a qualitative evaluation, in the laboratory, of different alternatives for assembling and operating a trivalent chromium bath for decorative chromium plating. Different chromium concentration solutions and different complexing agents were used. The initial result of this analysis was that chloride, formate and acetate solutions produced the best results. Solution preparation conditions were evaluated: temperature, chromium III complex formation time and also operation during the plating process: pH and temperature. The experimental work was done in the Alfacrom Ltda company; the parameters evaluated consisted of the appearance of chromium deposit and the minimum current density at which it appeared. Resistance to corrosion was tested in a saline-spray chamber, taking conventional hexavalent chromium plating as reference. This assay was done in the Universidad Nacional de Colombia’s Chemical Engineering Laboratory. It was concluded that trivalent chromium plating may represent a technical and economic alternative to conventional hexavalent chromium plating, this being a highly toxic and contaminant process. However, research should be continued into finding optimal process conditions.
Obtaining decorative chromium plating from trivalent chromium solutions
The present work was aimed at a qualitative evaluation, in the laboratory, of different alternatives for assembling and operating a trivalent chromium bath for decorative chromium plating. Different chromium concentration solutions and different complexing agents were used. The initial result of this analysis was that chloride, formate and acetate solutions produced the best results. Solution preparation conditions were evaluated: temperature, chromium III complex formation time and also operation during the plating process: pH and temperature. The experimental work was done in the Alfacrom Ltda company; the parameters evaluated consisted of the appearance of chromium deposit and the minimum current density at which it appeared. Resistance to corrosion was tested in a saline-spray chamber, taking conventional hexavalent chromium plating as reference. This assay was done in the Universidad Nacional de Colombia’s Chemical Engineering Laboratory. It was concluded that trivalent chromium plating may represent a technical and economic alternative to conventional hexavalent chromium plating, this being a highly toxic and contaminant process. However, research should be continued into finding optimal process conditions.
Obtaining decorative chromium plating from trivalent chromium solutions
Óscar Javier Suárez García (author)
2006
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Role of Complexant in Trivalent Chromium Plating Baths
| British Library Online Contents | 2005
Potassium Chloride Zinc Plating and Trivalent Chromium Passivation Technology
| British Library Online Contents | 2008
Process for Electroplating of Trivalent Chromium Decorative Coating and Its Characteristics
| British Library Online Contents | 2008
Current Status of Research and Development of Trivalent Chromium Plating
| British Library Online Contents | 2010
Blue - Bright Passivation with Trivalent Chromium Solution for Zincate Plating
| British Library Online Contents | 2007