Abstract
In this paper a study on the corrosion and wear protection of AM60B magnesium alloy, by means of multilayer coating, is described. The coating mainly consists of a porous oxide layer MgO, produced by oxidation in microarc regime, and a single or multilayer top coat of SiOx produced by sol-gel technique and deposited by either a dip or spray coating method. The anodic oxidation pretreatment improves the adhesion of the sol-gel layers, which seal the porosity of MgO and improve corrosion protection. Furthermore, the multilayer coating significantly improves AM60B wear resistance. Scanning electron microscopy and radiofrequency glow discharge optical emission spectroscopy were used to assess surface morphologies and in depth elemental profiles of the coatings. Electrochemical polarisation tests and wear tests were performed to evaluate the corrosion resistance behaviour and the wear resistance of the coated magnesium alloys.
| Original language | English |
|---|---|
| Pages (from-to) | 57-62 |
| Number of pages | 6 |
| Journal | Transactions of the Institute of Metal Finishing |
| Volume | 88 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Jan 2010 |
| Externally published | Yes |
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Keywords
- Anodic oxidation
- Corrosion
- Magnesium alloys
- Sol-gel coatings
- Wear
ASJC Scopus subject areas
- Condensed Matter Physics
- Surfaces and Interfaces
- Mechanics of Materials
- Metals and Alloys
- Surfaces, Coatings and Films