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What are the disadvantages of aluminum and aluminum alloys? How to solve these shortcomings?

Aluminum and aluminum alloys have the advantages of good conductivity, fast heat transfer, light specific gravity and easy molding, but they have the disadvantages of low hardness, non-wear resistance, easy intergranular corrosion and difficult welding, which affect the application scope. Therefore, in modern industry, electroplating is used to solve this problem in order to foster strengths and avoid weaknesses.