| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
Co-deposition of metals and particles is used to create a hard surfaces. Although some mechanism of co-deposition had been proposed so far, they are not satisfactory explain how the co-deposition proceed. This study aimed at establishing a co-deposition mechanism and minimizing the use of particle concentration in the plating baths. For Zn - alumina, chromia, rutile co-depostion system, the following conclusion was drawn.
(1) Adsorption of Zn ion on these particles increased with the solution pH. (2) Adsorption of the particles onto cathode surface was enhanced with decreasing the solution pH. (3) The maximum content of the particles in co-deposition was achieved at their PZC (point of zero charge) in the solution. (4) The minimum concentration of the particles in co-deposition baths was achieved with low pH. (5) Co-depostion was well explained by Guglielmi's equation. Acid-base property of the particles and adsorption of metal ion on the particles is important.
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