Compatibility Rating
📊 Note: Citric Acid resistance varies by concentration. Data available for: 10 %, 50 %. Search for specific concentrations →
Why is Aluminium resistant to Citric Acid?
Aluminium shows excellent resistance to Citric Acid due to its protective oxide layer (Al₂O₃) that forms naturally and resists many chemicals.
⚠️ 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 Citric Acid
| Material | 20°C | 50°C |
|---|---|---|
| HDPE | A | A |
| LDPE | A | A |
| PP | A | A |
| PTFE | A | A |
| PVDF | A | A |
| FEP | A | A |
| ECTFE/ETFE | NR | NR |
| EPDM | A | NR |
| Viton (FPM) | A | A |
| NBR | A | A |
| Silicone | NR | NR |
| SS 316 | A | B |
| SS 304 | A | C |
| Aluminium | A | NR |
| PVC Rigid | A | A |
| PVC Flexible | A | A |
| PMP | A | NR |
| Polystyrene | A | A |
| SAN | NR | NR |
| Polycarbonate | A | NR |
| PETG | NR | NR |
| Acetal (POM) | B | NR |
| Nylon (PA) | C | NR |
| Polysulfone | NR | NR |
A=Excellent · B=Good · C=Fair · D=Poor · NR=No Data
🌡️ Temperature Note
Good resistance at both 20°C and 50°C. Maximum service temperature for this material is 300°C — above this, degradation risk increases significantly.
🔄 Better Alternative?
Consider: SS 316 for corrosive chemicals. View all materials for Citric Acid →
FAQ
Is Aluminium resistant to Citric Acid?
Aluminium has Excellent (A) resistance to Citric Acid at 20°C.
Can I store Citric Acid in Aluminium?
Yes, Aluminium is rated A for Citric Acid.
📊 Note: Citric Acid resistance varies by concentration. Data available for: 10 %, 50 %. Search for specific concentrations →