NDLI: Electrodeposition of nanocrystalline chromium coatings from Cr(III)-based electrolyte using pulsed current

Content Provider	Springer Nature Link
Author	Danilov, F. I. Protsenko, V. S. Butyrina, T. E. Krasinskii, V. A. Baskevich, A. S. Kwon, S. C. Lee, J. Y.
Copyright Year	2011
Abstract	The effect of the pulse ratio on the current efficiency of the chromium electrodeposition reaction and the properties of coatings obtained from sulfate-formate electrolyte based on Cr(III) salts is studied. It is shown that the dependences of the current efficiency on the relative pulse duration feature a maximum that corresponds to a relative pulse duration of 2 (at τ$_{pulse}$ = τ$_{p}$ = 1 s). Light chromium coatings with good adhesion to the substrate are formed under pulsed electrolysis and their thickness is several tens of μm. In order to prevent pitting formation, it is expedient to introduce a special wetting surfactant additive into the electrolyte. As follows from the data of small-angle X-ray scattering, the deposited coatings are nanocrystalline. An increase in the relative pulse duration promotes a decrease in the nanocrystal size. The application of pulsed electrolysis leads to a decrease in the anodic dissolution rate of coatings in an acidic medium. Chromium electrodeposition decrease under pulsed current results in a decrease in internal stresses and in an increase in microhardness of coating.
Starting Page	598
Ending Page	605
Page Count	8
File Format	PDF
ISSN	20702051
Journal	Protection of Metals
Volume Number	47
Issue Number	5
e-ISSN	2070206X
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2011-09-17
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Tribology, Corrosion and Coatings Metallic Materials Materials Science Characterization and Evaluation of Materials Industrial Chemistry/Chemical Engineering Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Surfaces, Coatings and Films Materials Chemistry Metals and Alloys

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