Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Experimental Study of Removing Surface Corrosion Products from Archaeological Iron Objects and Alternating Iron Corrosion Products by Nd:YAG Laser Cleaning System

Nd:YAG 레이저를 이용한 철제유물의 표면부식물 제거 및 성분 변화 연구

  • Lee, Hye Youn (Kongju National University, Department of Cultural Heritage Conservation Science) ;
  • Cho, Nam Chul (Kongju National University, Department of Cultural Heritage Conservation Science) ;
  • Lee, Jong Myoung (Laser Engineering Group, IMT co. Ltd.) ;
  • Yu, Jae Eun (National Research Institute of Cultural Heritage, Restoration Technology Division)
  • 이혜연 (공주대학교 문화재보존과학과) ;
  • 조남철 (공주대학교 문화재보존과학과) ;
  • 이종명 ((주)아이엠티) ;
  • 유재은 (국립문화재연구소 복원기술연구실)
  • Received : 2012.01.30
  • Published : 2012.05.25
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Abstract

The corrosion product of archaeological iron objects is supposed to be removed because it causes re-corrosion. So far it is removed by scapel and sand blaster but they depend on the skill and experience of a conservator and the glass-dust of the sand blaster is harmful to humans. Therefore this study applies a laser cleaning system which is used in various industrial cleaning processes, to remove corrosion product from archaeological iron objects. In addition, this work studies the alternation of corrosion product after laser irradiation, which evaluates the reliability of the laser cleaning system. Optical microscopy, SEM-EDS, XRD, Raman have been used to observe and analyse the surface of the objects. The results show the capacity of laser cleaning some corrosion product, but blackening appears with increasing pulses and laser energy, and some corrosion products, goethite and hematite, are partially altered to magnetite. These problems, blackening and alternation of corrosion product, should be solved by further studies which find the optimal laser irradiation condition and use a wetting agent.

Keywords

Acknowledgement

Supported by : 국립문화재연구소

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