Comparative Susceptibility to Corrosion of Coated Expandable Bolts

  • J. HadjigeorgiouEmail author
  • Y. Savguira
  • S. J. Thorpe
Original Paper


Exposure of ground support systems to corrosive environments in underground hard rock mines can result in a significant degradation and loss of performance. This can have significant repercussions on the structural integrity of excavations in rock and potentially endanger the safety of mine workers. The use of corrosion inhibitor coatings can extend the useful working life of expandable rock bolts exposed to corrosive environments and act as a risk mitigating factor. This paper reports an investigation on the relative resistance to corrosion of six different variants of expandable bolts based on coating type and load capacity. The bolts were submerged for 226 days under two distinct water environments in an underground mine in the Sudbury basin. A systematic methodology was developed to assess the relative performance based on image analysis, SEM/EDX analysis of the exposed rock bolts, and changes in the morphological nature of the corrosion process. The results demonstrated significant variations in the performance of the various expandable coated bolts. This has significant implications in the material selection process for suitable rock bolts for specific corrosive environments.


Ground support Corrosion Coated rock bolts 



This work was undertaken for the purposes of a comparative investigation of different products in collaboration with an underground hard rock mine. No funding was provided by any of the rock bolt suppliers.


  1. Aziz NP, Craig J, Nemcik, Hai F (2015) Rock bolt corrosion—an experimental study. Min Technol 2014 123(2):69–77Google Scholar
  2. Carrier Air Conditioning Company (1965) Handbook of air conditioning system design. McGraw-Hill Books. New YorkGoogle Scholar
  3. Charette F (2012) Stochastic approach to the corrosion assessment of rock bolts. Rock Engineering CARMA Conference, EdmontonGoogle Scholar
  4. Charette F, Germain P, Hadjigeorgiou J (2004) Corrosion behaviour of Swellex bolts in underground mining environments, Edmonton, AB, Canadian Institute of Mining, Annual General MeetingGoogle Scholar
  5. Dorion JF, Hadjigeorgiou J (2014) Corrosion considerations in design and operations of rock support systems. Min Technol 2014 123(2):59–68Google Scholar
  6. Hadjigeorgiou J, Ghali E, Charette F, Krishnadev MR (2002) Fracture analysis of friction rock bolts. In: Hammah et al. (eds) NARMS-TAC. University of Toronto, Ontario, Canada, pp 881–887Google Scholar
  7. Hadjigeorgiou J, Dorion JF, Ghali E (2008) Support system performance under different corrosion conditions. J S Afr Inst Min Metall 108:359–365Google Scholar
  8. Langelier WF (1936) The analytical control of anticorrosion water treatment. J Am Water Works Assoc 28:1500CrossRefGoogle Scholar
  9. Meikle T, Tadolini S, Sainsbury B-A, Bolton J (2017) Laboratory and field testing of bolting systems subjected to highly corrosive environments. Int J Min Sci Technol 27:(2017) 101–106CrossRefGoogle Scholar
  10. Oler R, Chen J (2014) Introduction of a new superior coating on ground support products. 33rd International Conference on Ground Control in MiningGoogle Scholar
  11. Roberge PR, 1999, Handbook of corrosion engineering, McGraw-Hill, pp 94–115Google Scholar
  12. Satola I, Aromaa (2004) The corrosion of rock bolts and cable bolts. In: Ground support in mining and underground construction-Villaescusa & Potvin. (eds.) Taylor & Francis Group, London, pp 521–528Google Scholar
  13. Slatter M, Walker R (2009) New application of organic coating to existing ground support products. SME Annual Meeting Feb. 22-Feb. 25, 2009, Denver, COGoogle Scholar
  14. Vandermaat DS, Saydam PC, Hagan AG, Crosky (2016) Examination of rockbolt stress corrosion cracking utilizing full size Rockbolts in a controlled mine environment. Int J Rock Mech Min Sci 81:86–95CrossRefGoogle Scholar
  15. Villalba E, Atrens A (2007) Metallurgical aspects of rockbolt stress corrosion cracking. Mater Sci Eng A 491:8–18CrossRefGoogle Scholar
  16. Villaescusa E, Hassell R, Thompson AG (2008) Development of a corrosivity classification for cement grouted cable strand in underground hard-rock mining excavations. J South Afr Inst Min Metall 108:301–308Google Scholar

Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Lassonde Institute of MiningUniversity of TorontoTorontoCanada
  2. 2.Department of Materials Science and EngineeringUniversity of TorontoTorontoCanada

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