Effect of AlCl3, CH3SO3H on thickness, current efficiency and corrosion properties of brush plated Cr(III) formate urea baths
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Effect of AlCl3, CH3SO3H on thickness, current
efficiency and corrosion properties of brush
plated Cr(III) formate urea baths
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| Creator |
Saravanan, G.
Mohan, S. Gnanamuthu, R.M. Vijayakumar, J. |
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| Subject |
Industrial Metal Finishing
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| Description |
Brush plating technique was used to deposit trivalent Cr for the first time and effects of AlCl3 and
methane sulphonic acid (CH3SO3H) in the trivalent Cr bath was studied. Advantages of brush
plated Cr on suitable substrate produced by selective area deposition process with required
thickness was investigated. Owing to its portability, flexibility and easy to operate, brush plating
has found increasing use in industry. The main applications are for repair and resizing purposes.
Brush plated Cr on brass substrate has been investigated using XRD, SEM and AFM. X-ray
diffraction analysis revealed that the brush plated Cr(110) was crystalline. Uniform surface
coverage of the substrate by granular morphology was observed from SEM and AFM. CH3SO3H
increases the hydrogen overpotential on Cr deposition, therefore current efficiency and thickness
increased. Cr coated from bath containing both AlCl3 and CH3SO3H have better corrosion
resistance due to high charge transfer resistance Rct and very low Icorr than Cr(III) bath without
these additives.
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| Publisher |
Maney
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| Date |
2008
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/471/1/165-2008.pdf
Saravanan, G. and Mohan, S. and Gnanamuthu, R.M. and Vijayakumar, J. (2008) Effect of AlCl3, CH3SO3H on thickness, current efficiency and corrosion properties of brush plated Cr(III) formate urea baths. Surface Engineering, 24 (6). pp. 458-463. ISSN 0267-0844 |
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| Relation |
http://cecri.csircentral.net/471/
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