电镀工艺条件对钯铁合金镀层成分的影响  

Effects of Process Conditions on Compositions of Electroplated PalladiumIron Alloy Coating

作　　者：徐明丽[1] 张正富[1] 杨显万[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093

出　　处：《材料保护》2005年第5期31-34,共4页Materials Protection

基　　金：国家自然科学基金(50161002);云南省自然科学青年基金(2001E0007Q);国家人事部2001年度博士后基金

摘　　要：在由FeS04·7H2O、Pd(NH3)2Cl2、磺基水杨酸和(NH4)2SO4组成的镀液中,采用脉冲电沉积方法制备了Pd Fe合金镀层,并研究了各种电镀工艺条件对钯铁合金镀层成分的影响规律。结果表明:增大Fe2+浓度与增大脉冲电压均使镀层中铁含量增加;在导电盐浓度低于0.1mol/L时,随着浓度的增加,镀层中铁含量增加;用乙二胺调节溶液pH值所获得的镀层铁含量比用氨水调节要高些;增大镀液pH值、延长脉冲关断时间和延长施镀时间均使镀层中铁含量减少;升高镀液温度,镀层中铁含量先减少后增加,在约60℃时有最小值。因此,采用不同的工艺条件,可获得所需Pd/Fe原子比不同的钯铁合金镀层,为制备L10型晶体结构钯铁合金中Fe/Pd原子比为11的基本要求提供了重要的参考价值。Palladium-iron alloy coating was prepared by pulse electrodeposition in the bath composed of FeSO_4·7H_2O, Pd(NH_3)_2Cl_2, sulfosalicylic acid (SSCS), and conductive salt (NH_4)_2SO_4. The effect of the electroplating parameters on the compositions of PdFe alloy coating was studied. It was found that the increase in the Fe^(2+ )concentration and pulse voltage contributed to increase the iron content in the coating, and the iron content in the coating increased with increasing conductive salt concentration up to 0.1 mol/L. The iron content in the coating deposited from the plating bath containing ethylene diamine as the pH value adjustment agent was much higher than the coating deposited from the bath containing ammonia as the pH value ajustment agent. Moreover, the iron content in the coating decreased with increasing pH value of the plating bath and prolonging pulse off time t _(off) or electroplating duration. Besides, the iron content in the coating first decreased and then increased with increasing bath temperature, and the coating of the lowest iron content was deposited at about 60 ℃. Therefore, it was feasible to prepare PdFe alloy coatings with different Pd/Fe atom ratios by properly controlling the electroplating parameters, which is to provide important reference to the development of PdFe alloy coating with Fe/Pd atom ratio of 1:1 and L10 type crystalline structure.

关 键 词：电镀 钯铁合金 镀层成分 

分 类 号：TQ153.2[化学工程—电化学工业]