A Rapid Electrochemical Test for Porosity in Electroless Nickel Coatings on Carbon Steel Substrates
| Autor: | F. C. Wals, B. D. Barker, C. Kerr, Ayssar Nahlé |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Materials science
Carbon steel 020209 energy chemistry.chemical_element 02 engineering and technology engineering.material Electrochemistry 01 natural sciences Cathodic protection Electroless nickel 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Porosity 010302 applied physics Metallurgy Metals and Alloys Surfaces and Interfaces Condensed Matter Physics Surfaces Coatings and Films Anode Nickel chemistry Mechanics of Materials engineering Cyclic voltammetry Nuclear chemistry |
| Zdroj: | Transactions of the IMF. 76:29-34 |
| ISSN: | 1745-9192 0020-2967 |
| DOI: | 10.1080/00202967.1998.11871188 |
| Popis: | SummaryA rapid electrochemical test for the determination of porosity in electroless nickel coatings on carbon steel is described. The technique is based on the charge under the anodic peaks during the reverse cathodic scan of the cyclic voltammograms for various immersion times (ranging from 0 to 2 hours) of nickel-coated steel samples (0 to 24 μm thickness) in a solution consisting of 150 mL of 0.1 M H2SO4 and 10 mL of 0.1 M K4Fe(CN)6 at 298 K. It was found that approximately 44% of the steel area remained uncovered with nickel after 2 minutes deposition time (0.4 μn thick). This percentage of uncovered area with nickel decreased to approximately 3 % when the steel samples had been immersed for 14 minutes (2.8 μm thick); essentially complete coverage occurred after an immersion time greater than 30 minutes (6 μm thick). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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