EFFECT OF THE HEAT AND SURFACE LASER TREATMENT ON THE CORROSION DEGRADATION OF THE Mg-Al ALLOYS
Journal Title: Materials Engineering - Materialove inzinierstvo (MEMI) - Year 2011, Vol 18, Issue 3
Abstract
In this paper there is presented the corrosion behaviour of the cast magnesium alloys as cast state, after heat and laser treatment. Pitting corrosion resistance of the analyzed alloys was carried out using the potentiodynamic electrochemical method (direct current), based on a anodic polarisation curve. On the basis of the achieved anodic polarisation curves, using the Tefel extrapolation method near to the corrosion potential, the quantitative data were determined, which describe the electrochemical corrosion process of the investigated alloys: value of the corrosion potential Ecorr (mV), polarisation resistance R[sub]P[/sub] (kΩ.cm[sup]2[/sup]), corrosion current density icorr (μA/cm[sup]2[/sup]), corrosion rate Vcorr (mm/year) as well the mass loss V[sub]c[/sub] (g/m[sup]2[/sup]).
Authors and Affiliations
Leszek Dobrzański, Tomasz Tański, Szymon Malara
Keywords
Related Articles
- EP ID EP92159
- DOI -
- Views 148
- Downloads 0
COMPUTER CONTROLLED INVESTIGATION OF SURFACE AND BULK PROCESSES IN MG-BASED ALLOYS DURING HYDROGEN ABSORPTION
Different Mg-based alloys were tailored and prepared to investigate the surface and bulk processes during hydrogen absorption. Volumetric-, resistance-, XRD-, optical-, and mass measurements were carried out. Heat treatm...
COMPUTER CONTROLLED EXPERIMENTAL DEVICE FOR INVESTIGATIONS OF TRIBOLOGICAL INFLUENCES IN SHEET METAL FORMING
Sheet metal forming, especially deep drawing process is influenced by many factors. Blank holding force and drawbead displacement are two of them that can be controlled during the forming process. For this purpose, an e...
NANOINDENTATION TEST FOR DLC COATING ANALYSIS
In this report the effects of the substrate on the microhardness of Diamond like carbon (DLC) thin films were investigated. The DLC coatings were deposited by Radio Frequency Plasma Actived Chemical Vapor Deposition (RF...
Microstructure and properties of cast iron after laser surface hardening
Laser surface hardening of cast iron is not trivial due to the material’s heterogeneity and coarse-grained microstructure, particularly in massive castings. Despite that, hardening of heavy moulds for automotive industry...
Corrostion resistance of the welded AISI 316L after various surface treatments
The main aim of this work is to monitor the surface treatment impact on the corrosion resistance of the welded stainless steel AISI 316L to local corrosion forms. The excellent corrosion resistance of austenitic st...