Coupons were exposed for four 24-hour periods in various acids at the stated temperatures, and general corrosion rates were calculated from weight change measurements.
| Alloy |
Corrosion Rate (mils per year) |
| - |
10% HNO3 Boiling |
10% H2SO4 150°F (66°C) |
10% HCl 150°F (66°C) |
| 230® |
0.3 |
0.6 |
112 |
| 625 |
0.7 |
0.4 |
65 |
| 600 |
0.8 |
41.8 |
366 |
| 316 SS |
1.0 |
17.8 |
3408 |
| X |
- |
<0.1 |
99 |