Rating
| Concentration | 20 °C | 50 °C | Remark |
|---|---|---|---|
| dilute | C | D |
Material comparison at 20 °C
Resistance overview
Aluminium has limited resistance (C) to Potassium Sulfide at dilute at 20 °C. This indicates that the chemical has a noticeable effect on the material, which may include visible swelling, softening, or a measurable loss of tensile strength. Use is generally limited to short-term or intermittent contact where full structural integrity is not required. However, at 50 °C the resistance rating drops, indicating that temperature must be factored into the design. For heated applications, additional testing under actual service conditions is strongly recommended.
Application context
Potassium Sulfide is commonly encountered in metal finishing and laboratory work. Aluminium (Aluminium) is a metal typically used for vessels, heat exchangers, fittings and structural components. Because Potassium Sulfide is classified as corrosive, the choice of containment material is especially critical to prevent leaks, equipment damage, and safety hazards.
Practical recommendation
Aluminium has limited resistance to Potassium Sulfide and should only be used for short-term or intermittent contact at ambient temperature. The C rating means the material undergoes noticeable changes — swelling, loss of strength, or surface degradation — that make it unsuitable for permanent installations. For prolonged or continuous exposure, HDPE, LDPE, Nylon (PA) offer significantly better resistance and are rated A.
Did you know?
When choosing between metals for Potassium Sulfide service, engineers consider not just the resistance rating but also factors such as permeation rate, creep resistance, and weldability.
Materials rated A or B at 20 °C
Based on the row for dilute, 20 °C.
- Thermoplastics
- HDPE A, PP A, PVC Rigid A, LDPE A, Nylon (PA) A, Acetal (POM) B, Polycarbonate B, PVC Flexible A, Polystyrene A, PETG B, PMP A, SAN A
- Fluoropolymers
- PTFE A, PVDF A, FEP A
- Elastomers
- EPDM A, Viton (FPM) A, NBR B
- Metals
- SS 316 A, SS 304 A
About Aluminium
Aluminium relies on a thin oxide layer. Strong acids, strong alkalis and mercury compounds destroy that layer.
Rating scale
- A very good resistance
- B good resistance
- C limited resistance
- D not resistant
- – no data
- K no general statement possible
A rating marked * is an estimate in the source, not a test result. An estimate is given as one value without a temperature.
About this data
The ratings come from the chemical resistance list published by Bürkle GmbH, which compiled them from raw-material manufacturers’ data. They describe laboratory tests on the raw material at 20 °C and 50 °C.
A finished part also sees pressure, mechanical stress, welds and mixtures that a laboratory test does not. Treat the rating as a first filter and test under your own conditions before relying on it.