为了提高常温下Ce-Mn转化膜在铝合金表面的成膜速度和耐腐蚀性能,在室温、pH=2的Ce（NO₃）₃和KMnO₄的混合溶液中分别添加H₃BO₃、Zr（SO₄）₂、NaF、HF、NaBF₄和Na₂ZrF₆6种添加剂,研究添加剂对Ce-Mn转化膜的影响.通过光学显微镜、涡流测厚仪、点滴腐蚀法、Tafel极化曲线和交流阻抗等研究了膜的金相组织、厚度及耐腐蚀性能等;同时,通过SEM和EDS研究了氟化钠对膜的形貌和成分的影响.结果表明：氟化钠是较佳的常温成膜促进剂,常温下9 min就能成膜,相对于无添加剂的Ce-Mn转化膜,膜厚增加2.3倍,耐点滴腐蚀时间延长2.0倍,腐蚀电流密度降低至原来的1/3,膜电阻提高3.9倍：添加NaF后膜的铈含量从5.14%提高到8.59%,锰含量从7.70%提高到14.42%.

In order to accelerate the coating formation and improve the corrosion resistance of Ce-Mn conversion coating on aluminium alloy at room temperature,six additives including H₃BO₃,Zr（SO₄）₂,NaF,HF,NaBF₄ and Na₂ZrF₆ were respectively added in the mixed solution of Ce（NO₃）₃ and KMnO₄,and the effects of these additives on the behaviours of Ce-Mn conversion coating were investigated.Then,the metallographic structure and thickness of the coating were analyzed by using an optical microscope and an eddy current thickness meter,respectively,and the corrosion resistance of the coating was discussed by dropping corrosion test,Tafel polarization curves and electrochemical spectroscopy（EIS）.Finally,the effects of NaF on the morphology and composition of the coating were analyzed by means of SEM and EDS.The results indicate that,with the help of NaF,Ce-Mn conversion coating can be prepared at room temperature with a time consumption of only 9min,the thickness,anti-corrosion time,co-rrosion current density and impedance of the coating are respectively 3.3,3.0,1/3 and 4.9 times that of the coating without any additives,and the Ce and Mn contents of the coating increase from 5.14% to 8.59% and from 7.70% to 14.42%,respectively.It is thus concluded that NaF is an optimal additive for the formation of Ce-Mn coating.