Abstract
Corrosion and wear characteristics of pulse-plated chromium deposits, obtained from a self-regulating highspeed (SRHS) bath have been studied as a function of pulse current parameters such as duty cycle, average current density and pulse period. The chromium deposits obtained at duty cycles of 100 (direct current) to 60% were composed of a hemispherical nodular growth with a body centred cubic (b c c) lattice while those obtained at 20% duty cycle were composed of a needle-like structure containing a mixture of b c c lattice and hexagonal hydride. Corrosion rate, wear loss of chromium deposits and occluded hydrogen content in the deposits decreased up to 60% duty cycle, and then increased with further decrease in duty cycle to 20%. A two-stage variation of corrosion and wear properties with decreasing duty cycle is discussed in terms of crack density and the crystal structure of chromium deposits.
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Kim, JS., Song, RH., Pyun, SI. et al. Corrosion and wear characteristics of pulse-plated chromium deposits. J Mater Sci 24, 2704–2710 (1989). https://doi.org/10.1007/BF02385614
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DOI: https://doi.org/10.1007/BF02385614