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- W2352672761 abstract "Nanocrystalline chromium coating was prepared by pulse electrodeposition from trivalent chromium bath containing carboxylate-urea as complexing agent. The effects of electrodeposition parameters such as current density,bath temperature and solution concentration on the thickness and electrodeposition velocity of Cr deposited films were investigated. The crystallographic structures,morphology and chemical composition of Cr deposited films were analyzed by means of XRD,SEM and EDS. The results indicate that the deposited films with thickness up to 11.2 μm possess a smooth and clean appearance,and the grain size is less than 100 nm. The coating is pure chromium and the Cr deposit has face-centered cubic(fcc) structure and exhibits a(210) growth preference. Both the electrodeposition velocity and thickness exist maximum under different concentration complex agents,ureas,acetates,different temperatures and current densities. Compared with direct current electrodeposition,the thicker coating and finer grains can be obtained at lower temperature and current density by pulse electrodeposition. The electrodepostion velocity is about 0.24 μm/min,which is faster than that by direct current electrodeposition. In 1 mol/L H2SO4,3.5% NaCl and 10% NaOH solution,corrosion potential of Cr pulse-deposited film is about 100 mV higher than that of direct current. Corrosion and passivation current densities are lower and the nanocrystalline exhibits better corrosion resistance." @default.
- W2352672761 created "2016-06-24" @default.
- W2352672761 creator A5083012578 @default.
- W2352672761 date "2007-01-01" @default.
- W2352672761 modified "2023-09-23" @default.
- W2352672761 title "Process of pulse electrodeposition nanocrystalline chromium from trivalent chromium bath" @default.
- W2352672761 hasPublicationYear "2007" @default.
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