|
S.No. |
CHARACTERISTICS |
Lead Sub |
Red Lead (Jointing) Pb3O4 |
Red Lead (Setting) Pb3O4 |
Red Lead (Non - Setting) Pb3O4 |
Litharge (Chemical Grade) PbO |
Litharge (Battery Grade) PbO |
|
A. |
PHYSICAL |
|
|
|
|
|
|
|
1. |
Form |
Grey to Greenish Powder |
Orange Powder |
Orange to Brick Red Powder |
Brilliant Orange Red to Brick Red Powder |
Canary Yellow Powder |
Canary Yellow Powder with slight redish tinch |
|
2. |
Crystal Structure |
Tetragonal |
Spinal Structure |
Spinal Structure |
Spinal Structure |
Orthombic |
Orthombic Tetragonal |
|
3. |
Residue on 240 B.S. Standard Shieve (63 micron I.S. Shieve) % Max. |
3-5 |
0.25 |
0.1 |
0.1 |
0.1 |
0.1 |
|
4. |
Appearent Density (Scott) gm/cc |
1.5-1.6 |
1.3-1.5 |
1.3-1.5 |
1.0-1.2 |
1.8-2.0 |
1.8-2.0 |
|
5. |
Spacific Gravity |
|
9.0-9.2 |
9.0-9.2 |
9.0-9.2 |
9.6-9.9 |
9.6-9.9 |
|
6. |
Wt./Volume ml/gm. |
0.5-0.7 |
- |
0.4-0.5 |
0.45-0.5 |
0.38-0.40 |
0.38-0.40 |
|
B. |
CHEMICAL CHARACTERISTICS |
|
|
|
|
|
|
|
1. |
Water absorption mg./gm. |
110-125 |
- |
90-100 |
100-120 |
95-110 |
95-110 |
|
2. |
Acid absorption mg./gm. |
180-210 |
- |
160-180 |
140-150 |
90-100 |
90-110 |
|
3. |
Volatile matter % Max. |
- |
0.1 |
0.01 |
0.004 |
0.08 |
0.08 |
|
4. |
Oil absorption % |
- |
6-8 |
6-8 |
7-9 |
- |
- |
|
5. |
Matter Soluble in water % Max by Wt. |
- |
- |
0.008 |
0.008 |
0.08 |
0.08 |
|
6. |
Insoluble matter in Acitic Acid % Max. |
- |
- |
- |
- |
0.01 |
0.1 |
|
7. |
Free Lead % Max. |
30-35 |
Traces |
Nil |
Nil |
0.01 |
0.06 |
|
8. |
PbO2% |
- |
16-26 |
'30-33 |
33.2 and above |
0.001 |
0.015 |
|
9. |
Pb3O4 % |
- |
45-75 |
85-94 |
95 and above |
0.003 |
0.04 |
|
10. |
Moisture Contents % Max. |
|
0.05 |
0.05 |
0.05 |
0.06 |
0.08 |
|
11. |
Purity % Min. |
99.99 |
99.9 |
99.9 |
99.9 |
99.9 |
99.8 |