The improvement of aluminum alloys surface according to the industrial applications was achieved by many techniques. Including increase of hardness, that lead to improve wear resistant of aluminum alloys surface, for that purpose the electroplating was used. Electroplating by composite of hard chromium-Nanoceramic Co-deposit was conducted in this paper. Nanoceramic particles including Nanotitanium oxide (Nano-TiO2), Nano-aluminum oxide (?-Nano-Al2O3) and Nanozirconia (Nano-ZrO2) were used to hard chromium electroplating on 1050 aluminum alloy. For co-deposit analyses characterization were used scanning electron microscope (SEM) and- energy dispersive X-ray (EDX). The hardness was evaluated by Micro hardness tester, wear resistance was increased by increase the hardness with the presence of Nanoceramic particles in this process. The results showed the maximum hardness and minimum wear rate at the samples with Nanozirconium oxide particles were 1409MPa and (0.003*10-8cm3*cm-1) respectively.

CONCLUSIONS
The effect of the codeposite of Cr-Nano?-Al2O3, Cr-NanoTiO2 and Cr-NanoZrO2 on the hardness and wear dry sliding wear rate of 1050 Al-alloy electroplated by hard chromium deposit was achieved. The following conclusions have been drawn:
• The highest thickness was at the sample (S3) electroplated by hard chromium with NanoZrO2.
• The highest value of hardness was at the surface of sample co-deposit of CR-NanoZrO2.
• The best wear rate was at the Cr-ZrO2 codeposit on the surface of Sample (S3).
• The wear rate decreased with wear time increasing of most of samples.
• The hardness value increased about 60% at co-deposit of Cr-NanoZrO2