318
V. Malyshev et al.
Table 19.6
Conditions for washing tungsten monocarbide from electrolyte
Test no.
Mass of bulb, g
Volume of water in leaching, ml
V
HCl (1:1), ml
V,
ml
Yield of product, g
Tungsten content, %
Synthesis I
NaOH 10%
1
564
2500
66
200
22.7
79.3
2
430
2000
100
700
27.8
89.0
Synthesis II
NH
4 OH (1:1)
1
500
4000
120
650
21.0
78.5
2
440
3520
110
800
21.2
82.0
3
425
3400
216
695
31.0
86.7
4
417
3400
100
880
26.9
84.0
5
400
3400
100
800
26.0
88.5
6
440
3500
100
950
29.5
89.1
Note: Phase composition in all cases WC
+ C