Rhodium / Rh

  • General Designation: Rhodium
  • Applications: catalysts, crucibles, inert gas contacts, heating elements, mirrors
  • Product Forms: wire, sheet
  • Density (g/cm³): 12.41

Details

Age Hardenable
No
Material Behaviour
ductile
Forming Process
limited machinability, limited formability

Observations¹
In contact with
Temperature (°C)
Medium
Condition
Corrosion
20 solid moist light corrosive attack
20 ethanol/iodine - light corrosive attack
20 hydrochloric acid/bromine - light corrosive attack
20 sodium hypochlorite NaClO - light corrosive attack
20 hydrobromic acid HBr 60% light corrosive attack
20 nitric acid HNO3 65% no measurable corrosion
20 hydrofluoric acid 40% no measurable corrosion
20 hydro-iodic acid HI 57% no measurable corrosion
20 sulphuric acid H2SO4 96% no measurable corrosion
20 hydrofluoric acid 40% no measurable corrosion
20 gaseous Cl2 dry no measurable corrosion
20 bromine water - no measurable corrosion
20 gaseous Cl2 moist no measurable corrosion
20 aqua regia HNO3+HCl - no measurable corrosion
20 hydrochloric acid HCl 36% no measurable corrosion
20 dry Br2 moist no measurable corrosion
20 dry Br2 dry no measurable corrosion
20 solid dry no measurable corrosion
100 hydrochloric acid/chlorine 20%/saturated light corrosive attack
100 sodium hypochlorite NaClO - light corrosive attack
100 sulphuric acid H2SO4 96% light corrosive attack
100 glacial acetic acid CH3COOH - no measurable corrosion
100 phosphoric acid - no measurable corrosion
100 hydro-iodic acid HI 57% no measurable corrosion
100 nitric acid HNO3 65% no measurable corrosion
100 aqua regia HNO3+HCl - no measurable corrosion
100 nitric acid HNO3 95% no measurable corrosion
100 mercury chloride HgCl2 - no measurable corrosion
100 aluminium sulphate Al2(SO4)3 - no measurable corrosion
100 acetic acid 99% no measurable corrosion
100 hydrochloric acid/chlorine 36% no measurable corrosion
100 copper sulpühate CuSO4 - no measurable corrosion
100 hydrobromic acid HBr 60% relatively severe attack
100 hydrobromic acid/bromine HBr/Br2 60% total corrosion
300 sulphuric acid H2SO4 96% relatively severe attack
400 potassium hydroxide KOH - light corrosive attack
440 potassium bisulphate KHSO4 air access relatively severe attack
500 sodium hydroxide NaOH air access light corrosive attack
500 potassium hydroxide KOH air access light corrosive attack
550 molten NaCN/KCN (2:1) air access total corrosion
700 air access relatively severe attack
700 molten NaCN air access total corrosion
800 sodium hydroxide NaOH air access light corrosive attack
800 potassium hydroxide KOH air access light corrosive attack
Corrosion Resistant
see Table
Sources Chemical
¹ Edelmetall-Taschenbuch, ISBN 3-7785-2448-8

Thermo-emf. vs. copper Hard (mV)
-0.06
Temperature coefficient of electric resistivity
From Temperature (°C)
To Temperature (°C)
Hard (x10-4/K)
Annealed (x10-4/K)
0 100 46

Young's Modulus (GPa)
380
Modulus of Rigidity (GPa)
150
Poission's ratio
0.26
Property Range
Hardness (HV)
Tensile Strength (MPa)
Yield Strength (MPa)
Elongation (%)
410 800 - 1925 9

Melting Range
From Temperature (°C)
To Temperature (°C)
1960
Thermal conductivity (W /(m*K)) [RT]
88
Linear Coefficient of Expansion³
From Temperature (°C)
To Temperature (°C)
Coefficient (x10-6/K)
20 300 9.1

Disclaimer

The information in this data sheet contains only general information on the use of our products or examples for their application. They do not release the customer from a careful inspection of the delivered product for its fitness for the customer's particular purpose of use. Any customer's special requests regarding the particular use of a product will only be authoritative if Heraeus has confirmed to the customer in writing at the time of conclusion of a corresponding contract that the product delivered is fit for the customer's intended use. Heraeus, therefore, does not guarantee the correctness and completeness of the information regarding the customer's intended use. The customer's purchase will be governed exclusively by the written order confirmation of Heraeus and the Heraeus General Terms of Sale and Delivery, which are available at www.heraeus.com/gtc. This data sheet may be subject to changes at any time.

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