Preparation and Performance of a Self-Brittle Corrosive Bifunctional Detergent for Corrosive Deep Decontamination of Stainless Steel Surface Based on Controlled Polymerization by the RAFT One-Pot Method

Abstract

Nuclear facilities generate large amounts of contaminated stainless steel metallic material during maintenance and decommissioning. As a new radioactive decontamination method, the self-brittle decontamination method has the advantages of fewer secondary contaminants and can be operated remotely mechanically. The addition of a certain amount of corrosive components to the self-brittlement composite decontaminant can achieve the dual function of self-brittlement and corrosion decontamination. The performance of the decontaminant was investigated by single-factor experiments using electrochemical tests, morphological observations, and weight loss tests. The results show that the decontaminant has good self-embrittlement. When the concentration of HCl is 2.50 mol/L, HNO₃ is 3.50 mol/L, NaCl is 0.10 mol/L, and FeCl₃ is 0.15 mol/L, the decontaminant is formulated to have the best corrosion and decontamination effect on stainless steel. The detergent will produce a uniform corrosion layer on the surface of stainless steel, and the average corrosion depth can reach 8.3268 μm.

Keywords:

• Radioactive decontamination
• corrosive deep decontamination
• self-brittlement
• bifunctional decontaminant
• stainless steel

Credit Authorship Contribution Statement

Conceptualization: Yutuo Wang and Yintao Li; methodology: Yutuo Wang; software: Yutuo Wang; validation: Yutuo Wang and Changwen Chen; formal analysis: Yutuo Wang; investigation: Yutuo Wang and Mengqing Xiao; resources: Yutuo Wang; data curation: Yutuo Wang; writing original draft: Yutuo Wang; writing review and editing: Yutuo Wang and Yintao Li; supervision: Yutuo Wang and Yintao Li; visualization: Yutuo Wang; project administration: Yintao Li, Yuanlin Zhou, and Shanqiang Wang; and funding acquisition: Yintao Li.

Disclosure Statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (11zg2119).