Radiolytic formation of ferrous and ferric ions in carbon steel – deaerated water system

Radiation Induced Corrosion of Nuclear Fuel and Materials

“…in radiation field generally concluded, that under aerated or deaerated conditions in temperature range 30-250°C, the corrosion is affected by ionizing radiation at dose rates 0.01 kGy. h -1 (Smailos, 2002), 0.011-0.3 kGy.h -1 (Smart et al, 2008), 3 kGy.h -1 (Nelson et al, 1984), 13 kGy.h -1 (Ahn and Soo, 1995), which is consistent with observations made by Cuba et al (2011) at dose rate 0.22 kGy h -1 and temperatures 50 and 70°C. Similarly, the slow rates of corrosion processes in irradiated deaerated water at room temperature were also observed by others (Burns et al, 1983;Lapuerta et al, 2005).…”

“…These results suggest that water radiolysis does not necessarily increase, but rather limits, carbon steel corrosion under the conditions studied. In the similar study (Cuba et al, 2011), the influence of gamma irradiation on the formation of Fe-ions was investigated at different temperatures up to 90°C, with respect to the expected ingress of groundwater into the disposal site with spent nuclear fuel containers. Specifically, the kinetics of Fe 2+ and Fe 3+ formation in the presence of IR was studied.…”

Alpha localized radiolysis and corrosion mechanisms at the iron/water interface: Role of molecular species

“…Under these deaerated conditions, the Raman spectra dominated by a specific band at 670 cm -1 , are assigned to the magnetite Fe(II)Fe(III) 2 O 4 as shown by many authors [8,10,12,15,19,20,46] in agreement with the black color phase induced by the water radiolysis species onto the iron sample (set II). Onto the carbon steel sample (set III), we observe the vibrational Raman bands at 250/380/530/660 cm -1 assigned to the lepidocrocite -Fe(III)OOH orange color phase [8,14,[46][47][48][49]. For XPS experiments, we have taken care about the inert atmosphere during the transport of sample between the cyclotron facilities and the XPS device in order to avoid the oxidation of the samples.…”

“…Disregarding the high number of publications about the corrosion of these materials with [2][3][4][5][6][7][8][9][10] or without [11][12][13][14] irradiation, the combination of iron corrosion and water radiolysis mechanisms have not sufficiently been investigated in order to understand the part of each chemical processing. Moreover, much papers deal with the iron corrosion products under atmospheric conditions [2,3,11], anoxic [6,15] or both [4] and a few of them under nuclear reactors conditions [5,7,16].…”

“Impact of γ-radiation on carbon steel anaerobic corrosion and H2 production.”

“…6), which passivate and protect the carbon steel coupons surface. The identification of magnetite as predominant corrosion product has previously been observed in several carbon steel anoxic corrosion studies performed either under un-irradiated conditions [6,8,9,[31][32][33][34] or under irradiation [14,23,[35][36][37]. In previous studies dealing with long term anoxic corrosion under irradiation [14,38] such progressive magnetite formation has been associated to corrosion rate decrease.…”