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Effect of Electrodeposition Parameters on the Microstructure and Corrosion Behavior of DCPD Coatings on Biodegradable M g– C a– Z n Alloy
Author(s) -
BakhsheshiRad Hamid Reza,
Hamzah Esah,
Saud Safaa N.,
Medraj Mamoun
Publication year - 2014
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12301
Subject(s) - materials science , corrosion , alloy , microstructure , current density , coating , metallurgy , surface roughness , morphology (biology) , deposition (geology) , chemical engineering , nuclear chemistry , composite material , chemistry , paleontology , physics , quantum mechanics , genetics , sediment , biology , engineering
In this study, DCPD ( B rushite, C a HPO 4 .2 H 2 O ) coatings were prepared on the surface of a M g– C a– Z n alloy using different current density (0.15–1.2 mA/cm 2 ) and deposition time (5–90 min). The results revealed that DCPD with needle‐like morphology was observed for the current density between 0.15 and 0.4 mA/cm 2 , whereas plate‐like morphology was obtained at current density above 0.8 mA/cm 2 . The results showed that surface roughness increased with increasing current density. The lowest corrosion rate of 0.14 mm/year was obtained for the dense and uniform DCPD coating at 0.4 mA/cm 2 , while further increase has deleterious effect on the corrosion resistance.