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    CORROSION RESISTANCE OF MECHANICALLY CLINCHED IF STEEL AND MG-3.0AL-1.0ZN-0.3MN-0.5ND-XLA (X=0.1, 0.2 AND 0.5) ALLOY
    (2021-12) Mhawesh, Ziadoon Tareq Mhawesh
    Magnesium alloys are recommended to utilize in structural section of automotive industry because of their low-density value of 1.74 g/cm 3 which enable to decreasing of fuel consumption. However, the application of Mg alloys is very limited due to their low formability and moderate strength properties. The steels are used on many parts of automotive. IF steel that is known as excellent mechanical properties which contributes to using in many automobile parts such as longitudinal beams, cross members, B-pillars as well as skin parts. High strength IF steels are unmatched in deep drawing and mechanical strength. IF steels gain solid melt hardening in ferrite with manganese, silicon, and phosphorus. Besides their mechanical strength, they have good fatigue and impact resistance. The mechanical clinching method is a process without the need for additional material. Thanks to plastic deformation, thin sheet metallic materials are joined. To enhance the using application of Mg alloys in automobile parts, the mechanical clinching method is available due to steel- Mg joining is possible. In this study, IF steel sheets of 0.6 mm were joined by mechanical clinching with AZ31B Mg sheets containing Neodymium and Lanthanum. Then the corrosion resistance of clinched specimens was investigated by cross-section with potentiodynamic and immersion corrosion tests in 3.5% NaCl solution at 25°C. The results demonstrated that the rare earth added AZ31B Mg alloys can utilized to diminish corrosion rate in condition of both Nd and La amount is specific.