Open AccessAn oxide coating impedance measurement during micro-arc oxidation
Author(s) -
P. E. Golubkov,
E. А. Pecherskaya,
O. V. Karpanin,
O. A. Mel'Nikov,
Anatoliy V. Pecherskiy,
O A Timokhina
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1889/5/052041
Subject(s) - capacitance , materials science , voltmeter , electrical impedance , metrology , lcr meter , ammeter , conductivity , electrolyte , electrical engineering , output impedance , oxide , coating , optoelectronics , electrode , voltage , composite material , engineering , chemistry , physics , metallurgy , optics
The impedance instrument converter of oxide layers formed by micro-arc oxidation (MAO) is developed. It allows continuous non-destructive testing of electric parameters of the synthesized coatings (resistance and capacitance) and electrolyte conductivity to assess the degree of degradation. The instrument converter consists of a generator, a measuring circuit, a repeater and has a digital output. The modified ammeter-voltmeter method is used as the impedance measurement technique. High accuracy of resistance, capacitance and conductivity measurements (the total relative error is no more than 0.5%) is achieved by performed functional and metrological analysis of the converter measurement channels, as well as metrological tests.