The 24th International Workshop on Electromagnetic Nondestructive Evaluation (ENDE2019)

272 / 2019-11-29 13:06:34

Corrosion State Evaluation Using Clustering Method Based on Eddy Current Pulsed Thermography Technology

Eddy current pulsed thermography, atmosphere corrosion evaluation, clustering method

Plenary track > Material characterization (damages and micro-defects)

For atmosphere corrosion characterization and evaluation, the clustering algorithm, fast search and find of density peaks (CFSFDP), combined with gap statistic (GS) method is utilized to corroded Q235 carbon steel tubes. With the proposed method, three natural atmosphere corroded samples are investigated and classified. The proposed method successfully identifies the samples with different service periods. The temperature gradient, which indicates the heat generation and conductivity, is used to analyze cluster center selection. The matching rate is presented as a feature to reflect the corrosion state difference.