| Title |
A Study on the Quantitative Measurement of Porosity in PVD-Grown Coatings by Electrochemical Methods |
| Authors |
김정구(Jung Gu Kim); 안승호(Seung Ho Ahn) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Porosity; Porosity enlarged ratio; Electrochemical impedance spectroscopy; Induction time |
| Abstract |
The presence of porosity in the coatings can lead to the electrochemical dissolution of the substrate. Thus, the characterization of porosity in a quantitative manner is of great interest to researchers. Recent technological advances in porosity measurement using electrochemical methods have resulted in overcoming the traditional porosity measurement limitations. It is possible to establish the method of quantitative and reliable porosity measurement using electrochemical impedance spectroscopy. The accurate porosity measurement should be calculated from the initial immersion time to critical immersion time. The induction time to obtain the accurate porosity value was based on the correlation between the porosity enlarged ratio and the charge transfer resistance. The porosity values are summed up to the critical time, and then the total porosity values were divided by the number of measurements taken. (Received September 8, 2004) |