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Effect of AlCl3, CH3SO3H on thickness, current efficiency and corrosion properties of brush plated Cr(III) formate urea baths
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Saravanan, G., Mohan, S., Ramasamy, Gnanamuthu 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, Volume 24 (Number 6). pp. 458-463. doi:10.1179/026708408X334096 ISSN 0267-0844.
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Official URL: http://dx.doi.org/10.1179/026708408X334096
Abstract
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 R ct and very low I corr than Cr(III) bath without these additives.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||
Journal or Publication Title: | Surface Engineering | ||||
Publisher: | Maney Publishing | ||||
ISSN: | 0267-0844 | ||||
Official Date: | 1 November 2008 | ||||
Dates: |
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Volume: | Volume 24 | ||||
Number: | Number 6 | ||||
Page Range: | pp. 458-463 | ||||
DOI: | 10.1179/026708408X334096 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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