This work focused on the role of Al₂O₃ particles in the corrosion behavior of cold sprayed AA5083 aluminum alloy matrix composite (Al-MMC) coatings. The electrochemical characterization of the coatings was investigated in a 3.5 wt.% NaCl solution as a function of time. The results show that fragmentation of Al₂O₃ particles is not clearly observed in the case of AA5083/20 vol.% Al₂O₃ coating, while the broken Al₂O₃ particles can be seen clearly in AA5083/40 vol.% Al₂O₃ and AA5083/60 vol.% Al₂O₃ coatings. The addition of 20 vol.% Al₂O₃ particles yield the coating with the lowest porosity, and different volume fractions of Al₂O₃ in the feedstock have important effects on the electrochemical behavior of composite coatings. The Al-MMC coating reinforced with 20 vol.% Al₂O₃ particles exhibits the highest E_corr and the lowest i_corr compared with the other conditions. The order of current density is as follows: AA5083/20 vol.% Al₂O₃ < AA5083 < AA5083/40 vol.% Al₂O₃ < AA5083/60 vol.% Al₂O₃.

这项工作着眼于Al ₂ O ₃颗粒在冷喷涂AA5083铝合金基复合材料（Al-MMC）涂层的腐蚀行为中的作用。在3.5wt。％的NaCl溶液中研究涂层的电化学特性随时间的变化。结果表明铝的该碎片₂ ö ₃颗粒没有在AA5083 / 20体积％的Al的情况下，清楚地观察到₂ ö ₃涂层，而破碎的Al ₂ ö _3个颗粒可以清楚地在AA5083 / 40体积可以看出。％ Al ₂ O ₃和AA5083 / 60体积％Al ₂ O ₃涂料。添加20体积％的Al ₂ O ₃颗粒产生具有最低孔隙率的涂层，并且原料中Al ₂ O _3的不同体积分数对复合涂层的电化学行为具有重要影响。在Al-MMC涂层结构与20体积％的Al ₂ ö ₃颗粒表现出最高的Ë_更正件和最低我_更正件与其它条件相比较。电流密度的顺序如下：AA5083 / 20体积％Al ₂ O ₃ <AA5083 <AA5083 / 40体积％Al ₂ O ₃ <AA5083 / 60体积％Al ₂O ₃。