Research Article
Effect of Nitrite Ions on Steel Corrosion Induced by Chloride or Sulfate Ions
Table 1
Experimental design for chloride-induced corrosion.
| pH | mol/L | mol/L |
| pH 12.6 ± 0.3 | 0 | — | — | 0.4 | 0.2 | 0.1* | 0.05 | — | 0* | 0.02 | — | 0.1* | — | — | — | — | — | — | 0.053 | 0.53 | 0.265 | 0.106 | 0.053 | 0.027 |
— | — | 0 | 0.2 | — | 1 | 0.4 | 0.2 | 0.1* | 0.05 | — | 0* | 0.53 | — | — | 1.06 | 0.53 | 0.265 | 0.133 | 0.066 | 0 |
| pH 10.3 ± 0.3 | 0 | — | — | 0.4 | 0.2 | 0.1* | 0.05 | — | 0* | 0.02 | — | 0.1* | — | — | — | — | — | 0* | 0.053 | 0.53 | 0.265 | 0.106 | 0.053 | 0.027 | — | — | 0 | 0.2 | — | 1 | 0.4 | 0.2 | 0.1* | 0.05 | — | 0* | 0.53 | — | — | 1.06 | 0.53 | 0.265 | 0.133 | 0.066 | 0 |
| Distilled water | 0 | — | — | 0.4 | 0.2 | 0.1* | 0.05 | — | 0* | 0.02 | — | 0.1* | — | — | — | — | — | 0* | 0.053 | 0.53 | 0.265 | 0.106 | 0.053 | 0.027 | — | — | 0 | 0.2 | — | 1 | 0.4 | 0.2 | 0.1* | 0.05 | — | 0* | 0.53 | — | — | 1.06 | 0.53 | 0.265 | 0.133 | 0.066 | 0 |
| Mole ratio of / | 0.1 | 0.2 | 0.5 | 1 | 2 | 4 | 8 | — |
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