Analysis of oxide layer by simulating NiFe2O4 film on stainless steel, Incoloy-600 and carbon steel

Abstract

Radiation fields occur in nuclear power plant primary circuits, and decontamination is needed before the permanent shutdown of a reactor. Radiation field reduction in the primary coolant system of water-cooled reactors can be achieved by using a decontamination solution. As part of this, the corrosion behavior and characterization of oxide layers formed on different kinds of metal should be examined. In this study, NiFe 2 O 4 thin film was deposited on substrates of stainless steel, inconel and carbon steel via electron beam evaporation. The reaction between nickel ferrite and different metal ions results in varying compositions of oxide layers. The phase, structure and morphology of materials were confirmed by SEM, XRD and XPS analysis, and the magnetic properties of each deposited sample were observed by using vibrating sample magnetometer (VSM). The characteristics of the surface-coated metals are the main focus of this work.

The effect of temperature and UV irradiation on corrosion behavior of 304 stainless steel exposed to a simulated marine atmosphere

“…For the spectra of Fe 2p 2/3 , there are four peaks, including Fe metal , Fe ox 2+ , Fe ox 3+ , and Fe hyd (Figure 9c,d). [ 35,36 ]…”

“…Figure 9 9c,d). [35,36] Figure 10 shows the relative contents of [hydroxide] and [oxide] in corrosion products formed on 304 SS after 40 days of exposure in the simulated marine atmosphere at 35°C and 55°C under UV irradiation and in the dark, respectively. Obviously, the variation in UV irradiation and temperature changes the relative content of the corrosion products formed on the 304 SS surface.…”