# ELID Dressing Behaviors of Non-Abrasive Iron-Based Grinding Wheels
## 5 Conclusions  
1. Both the EDM and ELID electrolytic dressing techniques have demonstrated superior roundness when applied to non-abrasive iron-based grinding diamond wheels, thereby ensuring the feasibility of ELID ultra-precision grinding. The electric field distribution in these non-abrasive iron-based grinding diamond wheels is more evenly dispersed and sensible compared to that in abrasive grinding diamond wheels;
2. Scanning Electron Microscopy (SEM) results, obtained from four uniformly distributed points around the circumference, confirmed the even distribution of the oxide film on the surface of the non-abrasive iron-based grinding diamond wheels;
3. Further analysis revealed that the content of \(\alpha\)-Fe\({}_{2}\)O\({}_{3}\) particles in the non-abrasive iron-based grinding diamond wheel was 1-2 times that found in the W1.5 iron-based grinding diamond wheel. This increased presence of \(\alpha\)-Fe\({}_{2}\)O\({}_{3}\) particles could be a contributing factor to the observed superior performance;
4. The surface precision achieved when using the non-abrasive iron-based grinding diamond wheel to polish plate glass was significantly enhanced. The surface roughness was measured to be Ra0.5 nm, and no apparent scratches were detected. This reaffirms the potential and effectiveness of non-abrasive iron-based grinding diamond wheels in achieving high-precision results in material processing;
5. The mechanical properties of the oxide layer on the iron-based grinding diamond wheel without abrasive particles were determined using a nanoindentation instrument, yielding a hardness (H) of 800 MPa, an elastic modulus (E) of 23 GPa, and a stiffness of 0.3 mN/nm;
6. In subsequent applications, it is possible to adjust the current and voltage during electrolysis to control the thickness of the oxide film formed on the grinding wheel's surface. Furthermore, by tweaking the wheel formulation and grinding parameters, it is feasible to modify the content of \(\alpha\)-Fe\({}_{2}\)O\({}_{3}\) particles within the oxide film. Additionally, adjustments can be made to the mechanical properties of the oxide film on the grinding wheel's surface. Therefore, the performance of the oxide film is subject to dynamic changes.  
**Author Contributions:** Conceptualization, H.Z. and J.K.; writing--review and editing, D.V.A.; investigation, M.Z. All authors have read and agreed to the published version of the manuscript.  
**Funding:** The project described was supported by Grant Number 51475147 from the National Science Foundation, China, and by the Programs for Science and Technology Development of Henan (222102520003). It was also funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) and the Ministry of Science and Higher Education of the Russian Federation (grant No. FENU-2020-0020).  
**Institutional Review Board Statement:** Not applicable.  
**Informed Consent Statement:** Not applicable.  
**Data Availability Statement:** Data is contained within the article.  
**Acknowledgments:** Not applicable.  
**Conflicts of Interest:** The authors declare no conflict of interest.