検査技術・診断(5)

[VI-566] Corrosion Diagnosis near the Surface Border of Lighting poles and Signposts by Nondestructive Inspection Technologies(Estimation of corrosion depth by COLOPAT scan)

〇Kouichi Nagashima¹, Takeshi Abe², Yasuhiro Matuura³, hiromitu nishiyama⁴, Takahiro takamura⁵ (1.Toukyorigakukensa Co.,Ltd, 2.Tokyo Gas Engineering Solutions Corporation, 3.AMIC Co.,Ltd, 4.Fjisawa city, 5.Yokosuka city)

Keywords:road attachment , nondestructive testing method, corrosion deterioration, Screening, magnetic field, ultrasound

Aged steel poles for road lighting often suffer from corrosions near the road surface, but manual destructive checking of many poles is costly for local authorities. This report compares corrosion levels derived using unique nondestructive testing techniques and destructive corrosion data obtained in surveys by Fujisawa and Yokosuka city authorities, and the calibration of sensor signals in terms of corrosion depth are discussed.