We have investigated influence of concentrations of LiOH and Li
2MoO
4 on corrosion behavior of SS400 carbon steel immersed in concentrated LiBr solutions at 393 and 438 K for a short period about 0.2 ks. The corrosion behavior was evaluated by measurement of polarization curve. As a result, the following were obtained: Addition of LiOH to 65 mass% LiBr solution induced suppression of cathodic current around the corrosion potential to shift the corrosion potential lower. Further, two-step active dissolution current was found around the corrosion potential and passive current in the higher potential region. On the other hand, addition of 0.03 mass% Li
2MoO
4 to 65 mass% LiBr + 0.2 mass% LiOH solution induced small suppression of cathodic current around corrosion potential, and more addition of 0.06 mass% made the cathodic current slightly increase. Two-step active dissolution and passivation phenomena were found in the anodic polarization curve like those in the solution without Li
2MoO
4. The anodic current density was almost independent of the concentration of Li
2MoO
4. Corrosion rates of the steel immersed in various solutions at 393 K for the short period were almost the same as 1.5 A・m
―2. In the solutions at 438 K, corrosion rate decreased with an increase in LiOH concentration and increased with an increase in Li
2MoO
4 concentration.
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