The Library
Thermal study of selectively plated nickel sulfamate coatings
Tools
Molloy, D. A., Malinov, S., McNally, Tony and Hill, P. (2011) Thermal study of selectively plated nickel sulfamate coatings. Progress in Organic Coatings, 70 (4). pp. 330-335. doi:10.1016/j.porgcoat.2010.09.030 ISSN 0300-9440.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Official URL: http://dx.doi.org/10.1016/j.porgcoat.2010.09.030
Abstract
Nickel sulfamate solution was applied to mild steel substrates by the process of selective plating. The coated samples were heated to temperatures in the range of 50–1000 °C. Thermal analysis, X-ray diffraction and microscopy techniques were used to investigate the effect of secondary heating on the microstructure, mechanical properties and the composition of the surface coatings.
The microscopy analysis showed that the secondary heating caused diffusion within the coating itself and diffusion between the coating and the substrate as concentrations of iron increased in the coating and nickel appeared in the substrate. This diffusion redistribution also caused a phase transformation in the coating as NiO formed on the surface when the coating was heated in a furnace fitted with a nitrogen flow. However this transformation was found not to occur when the coating was heated in a sealed helium environment. Layer and grain growth occurred as temperature increased with the grains taking their preferred orientation as they were heated.
The surface hardness was found to initially rise up from 565 HV to 600 HV when heated to 200 °C. After 200 °C the surface hardness decreased in two stages before falling to 110 HV by 1000 °C. During tensile testing the coated samples performed marginally better in tension than the uncoated samples, however the temperatures used were not elevated high enough to show any real degradation during the tensile testing of the nickel coating that was shown during hardness testing and the microscopy analysis.
Item Type: | Journal Article | ||||||
---|---|---|---|---|---|---|---|
Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||
Library of Congress Subject Headings (LCSH): | Surface sealers, Protective coatings, Electroplating, Thermal analysis | ||||||
Journal or Publication Title: | Progress in Organic Coatings | ||||||
Publisher: | Elsevier | ||||||
ISSN: | 0300-9440 | ||||||
Official Date: | April 2011 | ||||||
Dates: |
|
||||||
Volume: | 70 | ||||||
Number: | 4 | ||||||
Page Range: | pp. 330-335 | ||||||
DOI: | 10.1016/j.porgcoat.2010.09.030 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||
RIOXX Funder/Project Grant: |
|
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |