Corrosion Resistance Comparison of Various Materials

Fluid (Ambient Temp.)
Silicon Carbide
Zirconia
99.5 Alumina
90% Alumina
SS304
Alloy 600
HC 276
50% H2SO4
A
B
A
B
D
D
A
36% HCl
A
B
B
B
D
D
B
70% HNO3
A
B
A
B
D
A
D
50% H3PO4
A
B
B
B
C
A
A
26% NH4OH
A
A
B
C
A
A
A
30% NaOH
A
A
B
C
A
A
C
Key:
A – Not affected
B – Recommended for long-term service
C – Not recommended for service greater than one year
D – Not recommended for service greater than one month

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