This study presents a novel amphiphilic target dendrimer including triple triazol segments and a linear molecule containing single triazol part. Self-assembly dendric molecular aggregates are produced basing on strong pi-pi interactions for protecting copper in 3 wt% NaCl solution. In contrast, the prepared linear molecule cannot form molecular aggregates. Scanning electron microscopy, transmission electron microscopy and dynamic light scattering are employed to characterize the morphologies and sizes of the yielded dendrimer aggregates. Chemical adsorption evidences of the dendrimer aggregates on the studied copper specimens are acquired by Fourier transform infrared spectroscopy, Raman spectroscopy as well as X-ray photoelectron spectroscopy. Corrosion inhibition efficiencies of the dendrimer aggregates for the surveyed copper specimens in NaCl solution are determined by electrochemical methods and weight loss experiments. The results suggest that the dendrimer aggregates could adsorb on the investigated copper specimen surfaces efficiently to achieve anticorrosion effects in 3 wt% NaCl solution.