| Summary: | 碩士 === 國立臺灣科技大學 === 化學工程研究所 === 81 === The effects of various chelating agent, viz. EDTA, NTA, and
Citrate, hydrogen ion concentration,initial copper ion
concentration, and chelating agents concent ration on the
rate of copper cementration on pure aluminum disks have
been studied.The changein the structure and morphology of the
resultant copper deposits agrees with the changes in
kinetic results calculated from the rate data. The SEM
results show that theincrease in the mass transfer rate is due
to the copper dendrites protrude into the diffusion
boundary layer. When the initial copper ion concentration
is higher than 2.5x10-3 M the specific rate constants
increase with the order of EDTA, NTA, No Chelating
Agent, and Citrate. However when the initial copper ion
concentration is lower than 2.5x10-3 M the specific rate
constants increase with theorder of EDTA, No Chelating Agent,
NTA, and Citrate. The fine bulbous deposit corresponding
to lower rate, the coarse and small dendrites corresponding
to moderate rate, the sparse leafs corresponding to higher
rate, and the feather like den drites corresponding to
highest rate. Experimental data also suggests that
certain chelating agents concentration the specific rate
constants increasing with the order of EDTA, NTA, and Citrate.
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