B. Torres

Influence of the chloride ion concentration on the corrosion of high-purity Mg, ZE41 and AZ91 in buffered Hank's solution

This research studied the influence of the chloride ion concentration on the corrosion behaviour of high-purity magnesium (Mg) and two Mg alloys in Hank’s solution, using hydrogen evolution and weight loss. A buffer based on CO2 and NaHCO3 was used to maintain the pH constant. The corrosion behaviour was governed by a partially protective surface film, and film breakdown by the chloride ions. The carbonated calcium phosphate layer that formed in Hank’s solution was important in determining the protective properties of the surface film.

Characterization of the Corrosion Behavior of a Mg Alloy in Chloride Solution

The influence of the microconstituent phases in the first stages of the corrosion process of the AZ91D Mg-Al alloy in a 3.5 wt% sodium chloride (NaCl) solution was studied at different immersion ti...

Wear Resistance of Stainless Steel Coatings on ZE41 Magnesium Alloy

Stainless steel coatings were deposited by high velocity oxy fuel (HVOF) technique on ZE41 magnesium alloy substrates. Different coatings with different thicknesses were sprayed on the magnesium alloy without causing any degradation on its microstructure and without modifying its mechanical properties. The wear behavior of the 316L stainless steel coatings was tested using the ball-on-disk configuration technique in dry conditions. Bulk 316L stainless steel and ZE41 magnesium alloys were also tested for comparative purposes. In the best conditions, the coatings provided up to 93% more wear resistance than uncoated ZE41 (at low loads and speeds) and only 11% below bulk 316L stainless steel (at high loads and speeds). The number of the layers that formed the coatings brings a change in the predominant wear mechanism through the appearance of a mechanical mixing layer (MML) that significantly reduces the wear rate.