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Comparitive Study of Commercially Available Rust Converters

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This is a presentation that I gave at the 2011 AIC annual convention in the Architecture Specialty Group.

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Comparitive Study of Commercially Available Rust Converters

  1. 1. Comparative Study of Commercially Available Rust Converters <br />Jason Church, Anna Muto, and Mary F. Striegel<br />National Center for Preservation Technology and Training<br />AIC ASG 2011<br />
  2. 2. What are Rust Convertors?<br />
  3. 3. Why this Study?<br />
  4. 4. Why this Study?<br /> “Corrosion Protection of Outdoor Iron Artifacts Using Commercial Rust Converters”<br /> Canadian Conservation Institute 1995<br />
  5. 5. Test Criteria<br />Product must be a rust “Convertor”<br />Commercially available<br />Easily obtainable<br />Designed for outdoor environment<br />Picked highest selling product from each of the 4 main acid types<br />
  6. 6. 4 Main Acid Types<br />“Ospho” = Phosphoric Acid<br />“Rust-oleum Rust Reformer” = Tannic Acid<br />“Corroseal” = Gallic Acid<br />“RCx427” = Oxalic Acid<br />“CCI Recipe” = Tannic + Phosphoric Acids<br />
  7. 7. Samples<br />Sheer cut <br />3”x6”x1/16” coupons<br />A36 Carbon Steel<br />Naturally weathered<br />
  8. 8.
  9. 9.
  10. 10. Before and at every 250 hours OUV<br />Color Measurements Taken<br />Coating Thickness Measured<br />Gloss Measured<br />Laser Profilometery Scan<br />FTIR Analysis of Surface<br />Photographed<br />
  11. 11. Minolta CR-400 Colorimeter<br />
  12. 12. PhisherDeltascopeFMP 30<br />
  13. 13.
  14. 14. BYK GardnerMirco-TRIGlossmeter<br />
  15. 15.
  16. 16. SolariusLaserscan<br />Corroseal Sample after Treatment<br />Corroseal Sample after 1032 Hrs QUV<br />
  17. 17. FTIR<br />
  18. 18. Photographed<br />
  19. 19. Ospho by Skybright<br />
  20. 20. Ospho by Skybright<br />
  21. 21. Rust Reformer by Rust-oleum<br />
  22. 22. Rust Reformer by Rust-oleum<br />
  23. 23. Corroseal by Rodda Paint Company<br />
  24. 24. Corroseal by Rodda Paint Company<br />
  25. 25. RCx427 by Enviro-Safe Services<br />
  26. 26. RCx427 by Enviro-Safe Services<br />
  27. 27. CCI = 10% Tannic Acid + 10%Phosphoric Acid +<br />
  28. 28. CCI Recipe<br />
  29. 29. Conclusion<br />Rust-oleum Rust Reformer<br /><ul><li>Gave most stable surface after 1032 hours
  30. 30. Least amount of staining and color change</li></li></ul><li>Continuation<br />Analysis FTIR to help understand surface interaction<br />Push Reformer to failure<br />Outdoor accelerated weathering tests <br />
  31. 31. Like to thank;<br />Anna Muto<br />Mary F. Striegel<br />Curtis Desselles<br />Charlotte Eng<br />

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