MECHANISM FOR NICKEL-MOLYBDENUM ALLOY ELECTRODEPOSITION FROM AMMONIACAL CITRATE ELECTROLYTES

被引：0

作者：

RENGAKUJI, S ^{[1
]}

NAKAMURA, Y ^{[1
]}

INOUE, M ^{[1
]}

NISHIBE, K ^{[1
]}

IMANAGA, H ^{[1
]}

机构：

[1] KANAZAWA UNIV,FAC TECHNOL,KANAZAWA,ISHIKAWA 920,JAPAN

来源：

DENKI KAGAKU | 1991年 / 59卷 / 10期

关键词：

NI-MO ALLOY; MECHANISM FOR ALLOY ELECTRODEPOSITION;

D O I：

暂无

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrodeposition of Ni-Mo alloys from ammoniacal citrate solutions was investigated by means of X-ray diffraction and ESCA. X-ray diffraction analysis of electrodeposited Ni-Mo alloys, heated at 600-degrees-C under 10(-4) Pa, indicated the existence of MoO2. Deposit from the electrolyte containing molybdate only showed diffraction pattern corresponding to MoO2 and was identified as tetravalent molybdenum species by ESCA. Probably, an intermediate product, MoO2 was reduced by hydrogen bonded with d-band vacancy of nickel. If the electrodeposition proceeded on this reduction step, maximum molybdenum content should be 13 at% which was calculated from d-band vacancy of Ni. However, maximum molybdenum content was experimentally found to be about 21 at%. The departure from calculated maximum value suggested that electrodeposited alloy also possibly possessed the d-band vacancy and further reduction of MoO2 proceeded by atomic hydrogen bonded with d-band vacancy of alloy. The alloy would lost all d-band vacancy when the alloy composition attained to maximum molybdenum content.

引用

页码：885 / 890

页数：6

共 11 条

[1] Bond P., 1963, J ELECTROCHEM SOC, V110, P650
[2] MECHANISM OF NICKEL MOLYBDENUM ALLOY ELECTRODEPOSITION IN CITRATE ELECTROLYTES
CHASSAING, E
QUANG, KV
WIART, R
[J]. JOURNAL OF APPLIED ELECTROCHEMISTRY, 1989, 19 (06) : 839 - 843
[3] CHERKAOUI M, 1987, PLAT SURF FINISH, V74, P50
[4] Cherkaoui M., 1988, ADV MAT MANUF PROCES, V3, P407
[5] ELLIOTT RP, 1965, CONSTITUTION BINARY, P622
[6] CATHODE POTENTIALS DURING THE ELECTRODEPOSITION OF MOLYBDENUM ALLOYS FROM AQUEOUS SOLUTIONS
ERNST, DW
HOLT, ML
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1958, 105 (11) : 686 - 692
[7] ROLE OF IRON-GROUP METALS IN THE INDUCED CODEPOSITION OF MOLYBDENUM FROM AQUEOUS-SOLUTION
FUKUSHIMA, H
AKIYAMA, T
AKAGI, S
HIGASHI, K
[J]. TRANSACTIONS OF THE JAPAN INSTITUTE OF METALS, 1979, 20 (07): : 358 - 364
[8] FUKUSHIMA H, 1981, KINZOKU HOYMEN GIJIT, V32, P58
[9] GOLUBKOV LA, 1971, J APPL CHEM-USSR+, V44, P2419
[10] HOOPER RAE, 1970, T I MET FINISH, V48, P182

← 1 2 →