Abstract
Al-Mg alloys serve as base alloys for the development of advanced alloys used in various aggressive environments. Search for ways to increase the corrosion resistance of aluminium-magnesium alloys and the existing methods are of scientific and practical interest. Rare earth metals (REM) find their practical application in the production of various materials. In this case, they can act as both alloying and basic components. The benefits of using REMs as additives to the materials include increased strength, a broader application scope in terms of temperature, and a range of fresh useful properties. For example, the addition of REMs to duralumin alloys results in their increased electrical resistivity and operating temperature threshold. This work looked at the corrosion and electrochemical behavior of the AMg6-Ce (Pr, Nd) alloy in the NaCl electrolyte by applying a potentiostatic method at the potential sweep rate of 2 mV/s. It is shown that due to the addition of REMs the corrosion rate of the bearing alloy is reduced approximately 1.5 times depending on the electrolyte concentration. The reduction in the corrosion rate is associated with the passivation process.
Keywords
AMg6 alloy, cerium, praseodymium, neodymium, potentiostatic method, free corrosion potential, corrosion potential, pitting potential, corrosion rate, NaCl electrolyte.
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