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Article
Corrosion Activity Laser Treated Aluminum12% Silicon Alloy with Fe and Ti Powders at Two Different Energies

Author: Mervit M. Hanoos
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 11 Part (A) Engineering Pages: 1196-1200
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In This work, the corrosion activity of laser treated almium12%siliconalloy was tested. The addition of Fe and Ti as elemental powderswas studied. Two different laser energies of 750 and 1000 kJ were used.Corrosion measurements by potential static at 3mV.sec-1in condensed syntheticautomotive solution. The corrosion data show that laser treatment led toincreasing corrosion resistance due to smoothness of the surface alloy becauseof high energy, and the corrosion resistance in the presence of Fe and Tipowders better than that in the absence of metallic powders were increased from(8.416 Ω.cm2( to )11.216 Ω.cm2( whereas corrosion rate decreased from(1.3194) to (0.7615) of specimens which laser treated with present Ti comparedwith as received , and the corrosion resistance increase with increasing laserenergy.


Article
Effect of Inhibition by Honey on Corrosion Behavior of Composite Materials from Al-4% Si Alloy Reinforced with Y2O3 Particles

Authors: Hanaa A. Al-Kaisy --- Mervit M. Hanoos
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 11 Part (A) Engineering Pages: 1208-1212
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

- this work focuses on the preparation specimens of metal matrixcomposite materials exemplified alloy (Al-4%Si) reinforced by yttria particlesY2O3 with different weight percentage (1,2and 3). Effect of yttria particles onpolarization behavior of (Al-4% Si alloy) in sulfuric acid (0.5 M) was studiedby using potentiostat in the presence and the absence of natural honey withdifferent concentration (1and 2gm/L) as inhibitor. The results show that thevalues of tafel slops and corrosion rate (Rmpy) of composite materialsreinforcing with particles of yttria with three percentage decreases withincreasing the concentration of honey, and the efficiency of inhibition (El%) ofcomposite materials in the acidic solution was more than that of base alloyafter adding 2gm/L of inhibitor corrosive medium are (64.79%, 77.49% and88.79%) respectively.

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