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-ray irradiationMotooka, Takafumi; Ueno, Fumiyoshi
Zairyo To Kankyo, 64(6), p.220 - 223, 2015/06
Corrosion behavior of carbon steel in chloride aqueous solutions under a low dose rate was investigated by corrosion test using chloride aqueous solutions with different chloride concentration at a dose rate of 500 Gy/h. The corrosion rate of carbon steel increased by the irradiation, and the corrosion rate had the maximum value at a certain chloride concentration. The oxidants produced by radiolysis of chloride aqueous solution enhanced the corrosion of carbon steel. The main oxidants were oxygen and hydrogen peroxide, and the diffusion process of oxidants controlled the corrosion of carbon steel under irradiation. There was a positive correlation between the dependence of corrosion rate and chloride concentration and the dependence of oxidant concentration and chloride concentration.
-ray irradiation; Effect of chloride ion concentrationMotooka, Takafumi; Yonekawa, Kazuo; Ueno, Fumiyoshi
no journal, ,
It is known that the corrosion of steel in neutral chloride solution has a chloride concentration at which the corrosion rate reaches a maximum. However, it is unknown that the effect of radiation at a low dose rate on this phenomenon. Therefore, we examined the effect of radiation at a low dose rate on corrosion of steel in neutral chloride solution by corrosion tests using various concentration of chloride neutral solutions. As the results, the corrosion rate becomes a maximum at a certain chloride concentration. It is consider that the increase in conductivity of solutions along with the chloride concentration increases and the decrease in concentrations of hydrogen peroxide and dissolved oxygen are key factors for the corrosion of steel in neutral chloride solution under a low dose rate condition.
Motooka, Takafumi; Yonekawa, Kazuo; Ueno, Fumiyoshi
no journal, ,
We investigated relationship between corrosion loss and the absorption dose rate by corrosion test using carbon steel in dilute neutral chloride solution under -ray irradiation. As a result, the corrosion rate increased with increase of dose rate. It was confirmed that corrosion rate clearly increase twice higher by the irradiation above 500Gy/h.
