Structural material like stainless steels (SS) was observed to be heavily contaminated by radioactive metal ions during the operation of radioactive liquid waste. Their safe, secure and environment friendly management is really challenging to nuclear industry. If the chemical behavior of steel corrosion could be determined, effective decontamination as well as successful decommissioning process could be planned. So far, in presence of radioactive metal ions, the severity of the steel corrosion, adsorption of Sr on steel surface under plant operating condition is unexplored. To study all these unexplored phenomena, experiments were carried out to understand the chemical behavior of contamination on SS304L under the exposure of Sr at 70 °C, since Sr is one high yield fission product, most heat emitting and long half-life. To explore the Sr adsorption behavior on plant structural materials (like SS), scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/ EDX) analyses were carried out before and after the exposure under HNO3 medium at 70 °C for 3 months. The elemental compositions of the SS surface were determined before and after the exposure. To establish the Sr adsorption on SS metal X-ray elemental mapping of the exposed SS was carried out. The kinetics of the corrosion of the SS was measured by inductively coupled plasma optical emission spectroscopy (ICP-OES). Grazing incidence X-ray diffraction (GI-XRD) analysis was carried out to identify possible formation of strontium chromate was observed. Finally we conclude the corrosion behavior and mechanism of contamination by Sr on SS.