Electroless deposition of composite coatings containing kaolin nanoparticles
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Electroless deposition of composite coatings containing kaolin nanoparticles
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| Creator |
Srinivasan, K.N.
Thangavelu, P.R. |
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| Subject |
Electrodeposition
Industrial Metal Finishing |
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| Description |
The ability to codeposit particulate matter in a matrix of electroless nickel has led to a new
generation of composite coatings with unique properties, such as high hardness wear, abrasion,
corrosion and high temperature oxidation resistance. In this paper, the authors report on the
development of electroless Ni–P–kaolin composite coating, and the characteristic properties of
the selected deposits were evaluated by scanning electron microscopy, energy dispersive X-ray
and X-ray diffraction techniques. A good rate of deposition of 12 mm h21 was observed for the
optimised concentration of 6 g L21 of kaolin in the bath. For the optimised bath composition and
operating conditions, the composite deposit was found to contain 81?7%Ni, 9?8%P and
10?5%kaolin. Heat treatment at 400uC for 1 h results in an increase in the hardness and wear
resistance of the composite coating. The corrosion resistance is also highly enhanced by the
incorporation of kaolin in the nickel–phosphorus matrix. The crystallite size of the composite
coating is 20 nm, and the codeposition of kaolin follows the Langmuir adsorption isotherm.
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| Publisher |
Maney publising
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| Date |
2012
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/2860/1/046-2012.pdf
Srinivasan, K.N. and Thangavelu, P.R. (2012) Electroless deposition of composite coatings containing kaolin nanoparticles. Transactions of the Institute of Metal Finishing, 90 (2). pp. 105-112. ISSN 0020-2967 |
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| Relation |
http://cecri.csircentral.net/2860/
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