Comparing thermal stimulation techniques in infrared thermographic inspection of corrosion in steel

International Scientific Conference on "Radiation-Thermal Effects and Processes in Inorganic Materials"

材料科学;物理学

Chulkov, A.O.^1 ; Vavilov, V.P.^1

National Research Tomsk Polytechnic University, Lenin Av., 30, Tomsk

634050, Russia^1

关键词: Application area;    Corrosion detection;    Data processing techniques;    Lateral dimension;    Quasi-monochromatic radiation;    Remote detection;    Thermal nondestructive testing;    Thermal stimulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/81/1/012100/pdf
DOI  :  10.1088/1757-899X/81/1/012100

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Remote detection of corrosion in metals is a developing application area of active thermal nondestructive testing. In this study, emphasis is made on the optimization of heating techniques that is of a major interest in practical surveys. Some popular data processing techniques, such as Fourier transform, correlation and principal component analysis, are also quantitatively compared in application to corrosion detection in 1-2 mm thick steel by applying a criterion of signal-to-noise ratio. The best inspection results have been obtained by using powerful halogen lamps and air blowers. Material loss of about 25% with lateral dimensions greater than 10 10 mm can be reliably identified in practical tests. The use of Xenon flash tubes is inefficient because of significant steel thickness. LED panels have not provided expected results due to low absorption of LED quasi-monochromatic radiation.