Effect of chemical plating time on the morphology and hardness of Ni-P chemical coating on 2A12 aluminum alloy surface

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Abstract

This paper takes 2A12 aluminum alloy as the research object, analyzes the influence of chemical plating time on the surface morphology and hardness of Ni-P coating on the surface of the substrate, observes the surface morphology of the substrate through the OLYMPUS DSX510 metallurgical microscope; Measures the hardness of the surface of the substrate with the HV-1000 microhardness tester, and the results show that, with the increase of the chemical plating time, the surface of the substrate with the Ni-P plating is more dense and the grain cells are bigger, while the surface hardness of the substrate is bigger, but with the increase of time, the surface is more rough. crystal cells are bigger, and at the same time the hardness of the substrate surface is bigger, but with the increase of time, the substrate surface is rougher.