材料期刊网

在200℃共融的氯化物熔盐中，以作为添加剂，电沉积出Mn含量为18％～40％的Al-Mn合金镀层．结果表明，当合金镀层中Mn含量超过31％时，具有单一的非晶态镀层，单相非晶态镀层的耐蚀性、硬度等性能均优于双相镀层．Ti和Ce的加入，促进了Al-MN金属玻璃的形成，使Mn含量较低的单相非晶体Al-Mn合金电沉积成为可能，提高了Al-Mn合金镀层的耐蚀性和硬度，使其点蚀电位提高了200 mV,镀层硬度提高到800 Hv．

The electrodeposition of Al-Mn and Al-Mn-Ti (Ce) alloys on steel substrate were studied at 200℃ from eutectic chloride molten salt with a controlled addlition of It was shownthat the Al-Mn alloy coating with single amorphous structure can be obtained when Mn content is above 31%,and the corrosion resistance, hardness as well as decorative properties of single-phase amorphous coatings aresuperior to those of dual-phase coating. Compared with aluminum, increasing of 350～450 mV for pittingpotential and 470～560 Hv for microhardness were observed in the single amorphous coatings. Moreover, It isshown that the addition of elements titanium and cerium can improve the formation of metallic glassy structure ofAl-Mn in the coating and can make the amorphous Al-Mn phase to form easily in low Mn content. The additionof element Ce or Ti can enhance the corrosion resistance and hardness, i.e. raise the pitting potential for 100～200 mV, the hardness of the coatings can be increased up to 800 Hv.