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Title of Journal: Int J Miner Metall Mater

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Abbravation: International Journal of Minerals, Metallurgy, and Materials

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Springer Berlin Heidelberg

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DOI

10.1016/0014-4827(81)90245-7

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1869-103X

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Modulation of active CrIII complexes by bath pre

Authors: Lei Li Zhi Wang Mingyong Wang Yi Zhang
Publish Date: 2013/09/06
Volume: 20, Issue: 9, Pages: 902-908
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Abstract

The preparation process of the CrIII bath was studied based on a perspective of accelerating the formation of active CrIII complexes The results of ultravioletvisible absorption spectroscopy UVVis and electrodeposition showed that active CrIII complexes in the bath prepared at room temperature in several days were rare for depositing chromium The increase of heating temperature time and pH value during the bath preparation promoted the formation of active CrIII complexes The chromium deposition rate increased with the concentration of active CrIII complexes increasing Increasing the heating temperature from 60 to 96°C the chromium deposition rate increased from 040 to 071 μm/min When the concentration of active CrIII complexes increased the grain size of Cr coatings increased and the carbon content of the coating decreased It is deduced that CrH2O4OHL2+ L is an organic ligand and its valence is omitted is a primary active CrIII complex

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