| DUAN Hai-dong,SUN Huan-wu,JI Gang-qiang,YANG Dong-liang,LI Si-xue.Evolution of Chemical Speciation and Interfacial Reaction of Elements on the Surface of Stainless Steel during Electrolytic Plasma Polishing[J],51(6):346-353, 389 |
| Evolution of Chemical Speciation and Interfacial Reaction of Elements on the Surface of Stainless Steel during Electrolytic Plasma Polishing |
| |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2022.06.033 |
| KeyWord:stainless steel electrolytic plasma polishing interfacial reaction chemical speciation XPS |
| Author | Institution |
| DUAN Hai-dong |
College of Mechanical and Vehicle Engineering, Taiyuan , China |
| SUN Huan-wu |
College of Mechanical and Vehicle Engineering, Taiyuan , China ;National Demonstration Center for Experimental Coal Resource and Mining Equipment Education, Taiyuan University of Technology, Taiyuan , China |
| JI Gang-qiang |
College of Mechanical and Vehicle Engineering, Taiyuan , China |
| YANG Dong-liang |
College of Mechanical and Vehicle Engineering, Taiyuan , China |
| LI Si-xue |
College of Mechanical and Vehicle Engineering, Taiyuan , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The change and mechanism of chemical forms of elements in the surface layer of stainless steel after electrolyte plasma polishing were studied, which can provide a reference for material removal mechanism, surface properties, process parameters, polishing solution treatment and other related research. A surface roughness tester and scanning electron microscope were employed to test and characterize the changes in surface roughness and morphology of the samples before and after processing. X-ray photoelectron spectroscopy was employed to test and characterize the composition, chemical state, and molecular structure of the main elements on the surface of the sample and in the polishing liquid sediment before and after processing. Then the interface reaction between solid, liquid, gas, and plasma in the process of processing was analyzed combined with the processing phenomenon and material removal mechanism. The results showed that the surface of the sample was smoother and brighter after electrolyte plasma polishing, and the traces of rough grinding in the pretreatment have been completely removed. The average value of Ra decreased from 0.311 μm to 0.045 μm, the average value of Rq decreased from 0.442 μm to 0.059 μm, and the average value of Rz reduced from 3.260 μm to 0.369 μm. Compared with the sample before polishing, S+6 and Ni+2 were detected on the surface of the sample after polishing. And it was found that the Fe in the sediment was Fe+3, and the Cr was mainly Cr+3, with a small amount of Cr+6. The main compounds of metal elements on the polished sample surface and in the deposit are oxides and hydroxides. Therefore, electrolyte plasma polishing of 316LVM stainless steel has a significant effect, and the surface roughness of the sample is significantly reduced after polishing. During the polishing process, the surface of the sample mainly undergoes oxidation, and the oxidizing substances mainly come from water. And sulfate ions and metal ions form sulfate, which may not participate in the redox reaction. The iron, chromium, and nickel of the samples are removed in the form of oxidation. Oxidized iron and chromium in the polishing liquid exist in the form of precipitation, and the oxidized nickel exists in the form of complexes. |
| Close |
|
|
|