**4. Conclusions**

The effects of Ca2+, CO3<sup>2</sup>− and SiO3<sup>2</sup>− on the corrosion behavior of pure iron in SG solutions were investigated by varying the concentration of added ions and reaction temperatures. The conclusions are as follows:


**Author Contributions:** Conceptualization, T.L., M.Y. and X.Z.; data curation, T.L. and G.H.; formal analysis, T.L., G.H. and X.Z.; investigation, G.H. and Y.F.; methodology, T.L. and X.Z.; project administration, L.W. and D.C.; resources, L.W. and D.C.; software, G.H. and Y.F.; validation, M.Y.; writing—original draft, T.L. and G.H.; writing—review and editing, T.L. and X.Z. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the Nuclear Material Innovation Foundation of China, gran<sup>t</sup> number No. ICNM-2019-ZH-05.

**Conflicts of Interest:** The authors declare no conflict of interest.
