ELECTRODEPOSITION OF ZINC-CHROME ALLOY
Rubrics: 2. CHEMICAL TECHNOLOGY
Authors:
1.
Yuri Gagarin State Technical University of Saratov
(the Department of «Technology and equipment of chemical, oil and gas, food production», Associate Professor)
employee from 01.01.2011 until now
Engel's, Saratov, Russian Federation
employee from 01.01.2011 until now
Engel's, Saratov, Russian Federation
2.
Engel'sskiy tehnol. in-t (filial) Saratovskiy gosud. tehnich. universitet im. Yu.A. Gagarina
Type:
Article
Pages:
from 60
to 64
Status:
Published
Received:
31.01.2026
Accepted:
31.01.2026
Published:
31.01.2026
Language:
Russian
Keywords:
ELECTRODEPOSITION, ALLOY, ZINC-CHROMIUM, STEEL 45, ELECTROLYTE, CURRENT DENSITY, PROPERTIES
Abstract:
This article describes the influence of electrolyte composition and cathode current density on the composition and properties of zinc-chromium coatings. The relevance of research into such electrodeposition processes is due to the fact that they have a number of advantages over existing methods: such as improved protective properties, since alloying zinc with chromium increases resistance to atmospheric corrosion, no need for additional processing (coatings do not require subsequent passivation, reducing production costs and environmental risks), expanded functionality (the ability to create coatings with special physicochemical characteristics). The objective of this study is to generalize and systematize the obtained experimental data on the process of combined electrodeposition of zinc and chromium from electrolytes of the studied compositions. The resulting coatings were examined using an AXIO Imager A2. M microscope. The composition of the electrodeposited alloy was analyzed by X-ray fluorescence using a Niton 3t (XRF Analyzer). The samples contain chromium from 0.14 to 0.42%. The adhesion of the electrodeposited coatings to the steel surface was measured in accordance with GOST 9.302-88; Comparative corrosion studies were conducted gravimetrically after soaking steel samples with an electrodeposited coating in 3% NaCl. It was found that all the obtained samples possessed a protective capacity higher than that of a chromated zinc coating (6.8 x 10-6 g/cm2 · h) with adhesion corresponding to GOST 9.302-88. The data obtained in this work can be used in electroplating for the development of processes and technologies for the electrodeposition of alloyed zinc coatings with chromium in order to eliminate the chromating operation.
This article describes the influence of electrolyte composition and cathode current density on the composition and properties of zinc-chromium coatings. The relevance of research into such electrodeposition processes is due to the fact that they have a number of advantages over existing methods: such as improved protective properties, since alloying zinc with chromium increases resistance to atmospheric corrosion, no need for additional processing (coatings do not require subsequent passivation, reducing production costs and environmental risks), expanded functionality (the ability to create coatings with special physicochemical characteristics). The objective of this study is to generalize and systematize the obtained experimental data on the process of combined electrodeposition of zinc and chromium from electrolytes of the studied compositions. The resulting coatings were examined using an AXIO Imager A2. M microscope. The composition of the electrodeposited alloy was analyzed by X-ray fluorescence using a Niton 3t (XRF Analyzer). The samples contain chromium from 0.14 to 0.42%. The adhesion of the electrodeposited coatings to the steel surface was measured in accordance with GOST 9.302-88; Comparative corrosion studies were conducted gravimetrically after soaking steel samples with an electrodeposited coating in 3% NaCl. It was found that all the obtained samples possessed a protective capacity higher than that of a chromated zinc coating (6.8 x 10-6 g/cm2 · h) with adhesion corresponding to GOST 9.302-88. The data obtained in this work can be used in electroplating for the development of processes and technologies for the electrodeposition of alloyed zinc coatings with chromium in order to eliminate the chromating operation.
Keywords:
ELECTRODEPOSITION, ALLOY, ZINC-CHROMIUM, STEEL 45, ELECTROLYTE, CURRENT DENSITY, PROPERTIES
ELECTRODEPOSITION, ALLOY, ZINC-CHROMIUM, STEEL 45, ELECTROLYTE, CURRENT DENSITY, PROPERTIES
