A study on electrophoretic deposition of Ni nanoparticles on pitted Ni alloy 600 with surface fractality

Lee, Jun Young; Pyun, Su‐Il; Rhee, Chang Kyu

doi:10.1016/j.jcis.2006.12.043

Cited by 4 publications

(3 citation statements)

References 31 publications

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“…-0.1 V (vs. SCE) and 0.1 V (vs. SCE) for unmodified SS and CDS SS, respectively. The increase in current density above E pit implies that the overvoltage for the anodic dissolution of a pit becomes lower, i.e., the formation and growth of the stable pits on the surface occurs more easily [6,7].…”

Section: Resultsmentioning

confidence: 99%

Corrosion Behavior of Ceramic Dispersion Strengthened High-Cr Stainless Steel

Lee

Hong

et al. 2008

SSP

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In the present work, corrosion characteristics of ceramic dispersion strengthened (CDS) high-Cr stainless steel (SS) has been investigated. For the preparation of CDS SS with uniformly distributed reinforcements, TiC particles were mechanically activated with Cu powder by using high-energy ball mill machine, and then Cu-coated TiC particles were mixed with molten SS. Potentiodynamic polarization curves were experimentally measured on unmodified SS and CDS SS in 0.05 M NaCl solution. The values of corrosion potential Ecorr, corrosion current io, pitting potential Epit and polarization resistance Rp were quantitatively determined from the measured potentiodynamic polarization curves. From the result, it is concluded that CDS SS exhibits higher corrosion resistivity than unmodified SS.

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Section: Resultsmentioning

confidence: 99%

Corrosion Behavior of Ceramic Dispersion Strengthened High-Cr Stainless Steel

Lee

Hong

et al. 2008

SSP

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“…In addition to the coating of conducting substrates, EPD also has been used to fabricate monolithic, laminated, and functionally graded freestanding objects as well as to infiltrate porous materials and woven fibre performs used in composite production. Most of the applications and studies of EPD have used ceramic particles but there are a few publications on the EPD of particulate non-noble metals [4][5][6][7][8][9][10][11][12][13][14][15]. It is clear that one of the reasons for the lack of availability of such colloidal metal particles is the tendency for most of the metallic particles to oxidise, thereby forming a passivating oxide layer of a high volume ratio relative to the remaining metal core, which makes it an unattractive method to achieve a uniform metallic coating.…”

Section:  Low Cost Of Infrastructure and Processmentioning

confidence: 99%

“…In the present case, this was attempted by applying an adhesive insulating coating on the back side, although this was only partially successful. However, the deposition differentials were virtually (14) unnoticeable after the initial stage of EPD (viz., the first data point for each parameter) and, since the data for the later stages all are extrapolated to zero, these effects can be ignored.…”

Section: Complete Fractionmentioning

confidence: 99%

Electrophoretic mobilities of dissolved polyelectrolyte charging agent and suspended non-colloidal titanium during electrophoretic deposition

Lau

Sorrell

2011

Materials Science and Engineering: B

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Coarse (≤20 μm) titanium particles were deposited on low-carbon steel substrates by cathodic electrophoretic deposition (EPD) with ethanol as suspension medium and poly(diallyldimethylammonium chloride) (PDADMAC) as polymeric charging agent.Preliminary data on the electrophoretic mobilities and electrical conductivities on the suspensions of these soft particles as well as the solutions themselves as a function of PDADMAC level were used as the basis for the investigation of the EPD parameters in terms of the deposition yield as a function of five experimental parameters: (a) PDADMAC addition level, (b) solids loading, (c) deposition time, (d) applied voltage, and (e) electrode separation. These data were supported by particle sizing by laser diffraction and deposit surface morphology by scanning electron microscopy (SEM).The preceding data demonstrated that Ti particles of ~1-12 μm size, electrosterically modified by the PDADMAC charging agent, acted effectively as colloidal particles during EPD.Owing to the non-colloidal nature of the particles and the stabilization of the Ti particles by electrosteric forces, the relevance of the zeta potential is questionable, so the more fundamental parameter of electrophoretic mobility was used. A key finding from the present work is the importance of assessing the electrophoretic mobilities of both the suspensions and solutions since the latter, which normally is overlooked, plays a critical role in the ability to interpret the results meaningfully. Further, algebraic uncoupling of these data plus determination of the deposit yield as a function of charging agent addition allow discrimination between the three main mechanistic stages of the electrokinetics of the process, which are: (1) surface saturation; (2) compression of the Lau, K.T. et al. (2011) Mater. Sci. Eng. B, No. 176: 369-381, http://dx.doi.org/10.1016No. 176: 369-381, http://dx.doi.org/10. /j.mseb.2010 (3) diffuse layer, growth of polymer-rich layer, and/or competition between the mobility of Ti and PDADMAC; and (3) little or no decrease in electrophoretic mobility of Ti, establishment of polymer-rich layer, and/or dominance of the mobility of the PDADMAC over that of Ti.

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