Rhodium Rd99,8
Designation
| Name |
The value |
| Designation GOST Cyrillic |
Рд99,8 |
| Designation GOST Latin |
Pd99,8 |
| Transliteration |
Rd998 |
| The chemical elements |
- |
Description
Rhodium Rd99,8 is used: for the manufacture of flat products, wire, technical products, crucibles used in instrumentation and other industries and research organizations; application of protective coatings (rhodium).
Note
Rhodium is not soluble in acid and boiling Aqua Regia.
The pressure treatment is conducted at 1200 °C — 1400 °C.
Rhodium coatings have good reflectivity, high hardness, heat (up to 430 °C) and chemical resistance.
Standards
| Name |
Code |
Standards |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
GOST 13098-2006 |
| Sheets and stripes |
В53 |
GOST 24718-81 |
Chemical composition
| Standard |
Si |
Fe |
Pb |
Ba |
Au |
Rh |
| GOST 13098-2006 |
≤0.03 |
≤0.02 |
≤0.01 |
≤0.008 |
≤0.01 |
≥99.8 |
Rh is the basis.
According to GOST 13098-2006, the total content of platinum, palladium, iridium and ruthenium should be ≤ 0.150%. The sum of all impurities, as well as the admixtures of nickel, copper and aluminum, which are standardized and indicated in the table, should be ≤ 0.20%.
Mechanical characteristics
| σB, MPa |
Brinell hardness number, MPa |
| Wire, flat-rolled products in delivery condition |
| 589-981 |
110-140 |
Description mechanical marks
| Name |
Description |
| σB |
Limit short-term strength |
Physical characteristics
| Temperature |
r, кг/м3 |
| 20 |
12450 |
A description of the physical symbols
| Name |
Description |
| l |
Coefficient of thermal conductivity |
