Improving Spatial Confinement of Anodic Dissolution of Heat-Resistant Chromium−Nickel Alloys during Pulsed Electrochemical Machining
- Authors: Silkin S.A.1,2, Aksenov E.N.1, Likrizon E.A.1, Petrenko V.I.3, Dikusar A.I.1,3
- 
							Affiliations: 
							- Shevchenko Pridnestrovie State University
- Kostroma State University
- Institute of Applied Physics
 
- Issue: Vol 55, No 5 (2019)
- Pages: 493-501
- Section: Article
- URL: https://journals.rcsi.science/1068-3755/article/view/231329
- DOI: https://doi.org/10.3103/S1068375519050120
- ID: 231329
Cite item
Abstract
Using a microsecond-pulsed current (20 μs) for the high-rate anodic dissolution of heat-resistant chromium−nickel alloys (current density amplitudes up to 100 A/cm2) can enable the improvement of the spatial confinement of anodic dissolution due to the presence of a growing dependence of current efficiency on the current density observed in these conditions. This effect, however, is limited to chromium−nickel steel only, and the duty cycle must be at least 4. We hypothesize that this dependence arises from thermokinetic effects that manifest as a series of interrelated processes with positive feedback: rate of electrochemical reaction (current density)−surface temperature−rate of electrochemical reaction. In certain critical conditions, this relationship results in thermokinetic instability and destruction of passive surface layers.
About the authors
S. A. Silkin
Shevchenko Pridnestrovie State University; Kostroma State University
														Email: dikusar@phys.asm.md
				                					                																			                												                	Moldova, Republic of, 							Tiraspol, 3300; Kostroma, 156005						
E. N. Aksenov
Shevchenko Pridnestrovie State University
														Email: dikusar@phys.asm.md
				                					                																			                												                	Moldova, Republic of, 							Tiraspol, 3300						
E. A. Likrizon
Shevchenko Pridnestrovie State University
														Email: dikusar@phys.asm.md
				                					                																			                												                	Moldova, Republic of, 							Tiraspol, 3300						
V. I. Petrenko
Institute of Applied Physics
														Email: dikusar@phys.asm.md
				                					                																			                												                	Moldova, Republic of, 							Chisinau, MD-2028						
A. I. Dikusar
Shevchenko Pridnestrovie State University; Institute of Applied Physics
							Author for correspondence.
							Email: dikusar@phys.asm.md
				                					                																			                												                	Moldova, Republic of, 							Tiraspol, 3300; Chisinau, MD-2028						
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