Abstract
Colour coatings of Ni-pigment composite film over a zinc surface using the immersion plating technique were investigated. Two types of approaches were applied in synthesizing the composite films. In one method, composite films were synthesized simply by immersing a zinc substrate in an aqueous solution containing nickel ions and pigment particles dispersed with the aid of a surfactant mixture containing nonionic azobenzene surfactant (AZPEG) and n-sodium dodecyl sulfate (SDS). In the other method, composite films were synthesized in two steps. In the first step, a thin pigment film was deposited on a zinc substrate by micelle disruption technique using AZPEG followed by deposition of nickel in the second step: the immersion of the substrate in an aqueous solution containing nickel ions. Both of these methods produced a uniform coloured composite film with good adhesion. The adherence of these composite films was enhanced by the co-deposition of PMMA latexes with the pigment followed by thermal treatment of the coatings. The contact angle measurement revealed that all the composite films investigated in the present study had a greater degree of water repellency property than that of the electroplated nickel.
Original language | English |
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Pages (from-to) | 5526-5531 |
Number of pages | 6 |
Journal | Surface and Coatings Technology |
Volume | 200 |
Issue number | 18-19 |
DOIs | |
State | Published - 8 May 2006 |
Keywords
- Colour
- Composite
- Immersion plating
- Nickel
- Organic pigment