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The Study on the Corrosion of Steel Plate with Infrared Camera

  To detect surface corrosions of steel plate, Infrared camera was used. The steel plate was coated with uretan resin formulated with Strontium Chromate(STC). The test specimen were immersed in 0.5M NaCl-solution with 10 mV during 6 month. To detect coating surface corrosions, the plate was slightly heated. Delaminated blister, blister and filiform corrosion are clearly detected with infrared camera. According to a kind of corrosion, the temperature of steel plate are different. The greater the diameter of blister, the higher the temperature of center of blister.