Compatibility Rating
Why is Aluminium rated this way to Sodium Hydroxide Caustic Soda?
Aluminium is not recommended for use with Sodium Hydroxide Caustic Soda. Significant degradation or failure is expected.
⚠️ When NOT to use Aluminium
Avoid using Aluminium with strong acids (HCl, H₂SO₄), strong alkalis (NaOH), and mercury compounds which destroy the protective oxide layer.
Comparison Table — All Materials for Sodium Hydroxide Caustic Soda
| Material | 20°C | 50°C |
|---|---|---|
| HDPE | A | A |
| LDPE | A | A |
| PP | A | A |
| PTFE | A | A |
| PVDF | B | B |
| FEP | NR | NR |
| ECTFE/ETFE | NR | NR |
| EPDM | A | NR |
| Viton (FPM) | D | D |
| NBR | C | D |
| Silicone | NR | NR |
| SS 316 | B | B |
| SS 304 | B | B |
| Aluminium | D | D |
| PVC Rigid | NR | NR |
| PVC Flexible | NR | NR |
| PMP | NR | NR |
| Polystyrene | NR | NR |
| SAN | NR | NR |
| Polycarbonate | D | D |
| PETG | D | D |
| Acetal (POM) | C | C |
| Nylon (PA) | A | C |
| Polysulfone | NR | NR |
A=Excellent · B=Good · C=Fair · D=Poor · NR=No Data
🌡️ Temperature Note
Maximum service temperature for this material is 300°C. Always verify compatibility at your specific operating conditions.
🔄 Better Alternative?
Consider: SS 316 for corrosive chemicals. View all materials for Sodium Hydroxide Caustic Soda →
FAQ
Is Aluminium resistant to Sodium Hydroxide (Caustic Soda)?
Aluminium has Poor (D) resistance to Sodium Hydroxide (Caustic Soda) at 20°C. Not recommended - significant degradation expected.
Can I store Sodium Hydroxide (Caustic Soda) in Aluminium containers?
Use caution - Aluminium is rated D (Poor) for Sodium Hydroxide (Caustic Soda) at room temperature.