Comparitive Study of Commercially Available Rust Converters
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This document summarizes a study that tested commercially available rust converters on steel samples over time. The study tested products from four main acid types - phosphoric, tannic, gallic, and oxalic acids. Samples were treated and then analyzed every 250 hours of UV exposure by measuring color, thickness, gloss, and performing other tests. According to the results, Rust-oleum Rust Reformer, which contains tannic acid, gave the most stable surface after 1032 hours with the least staining and color change. The authors conclude the study provides information on how the products interact with steel surfaces and their stability over time when exposed to weather.
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Comparitive Study of Commercially Available Rust Converters
- 1. Comparative Study of Commercially Available Rust Converters Jason Church, Anna Muto, and Mary F. Striegel National Center for Preservation Technology and Training AIC ASG 2011
- 2. What are Rust Convertors?
- 4. Why this Study? “Corrosion Protection of Outdoor Iron Artifacts Using Commercial Rust Converters” Canadian Conservation Institute 1995
- 5. Test Criteria Product must be a rust “Convertor” Commercially available Easily obtainable Designed for outdoor environment Picked highest selling product from each of the 4 main acid types
- 6. 4 Main Acid Types “Ospho” = Phosphoric Acid “Rust-oleum Rust Reformer” = Tannic Acid “Corroseal” = Gallic Acid “RCx427” = Oxalic Acid “CCI Recipe” = Tannic + Phosphoric Acids
- 7. Samples Sheer cut 3”x6”x1/16” coupons A36 Carbon Steel Naturally weathered
- 10. Before and at every 250 hours OUV Color Measurements Taken Coating Thickness Measured Gloss Measured Laser Profilometery Scan FTIR Analysis of Surface Photographed
- 16. SolariusLaserscan Corroseal Sample after Treatment Corroseal Sample after 1032 Hrs QUV
- 17. FTIR
- 18. Photographed
- 21. Rust Reformer by Rust-oleum
- 22. Rust Reformer by Rust-oleum
- 23. Corroseal by Rodda Paint Company
- 24. Corroseal by Rodda Paint Company
- 25. RCx427 by Enviro-Safe Services
- 26. RCx427 by Enviro-Safe Services
- 27. CCI = 10% Tannic Acid + 10%Phosphoric Acid +
- 28. CCI Recipe
- 31. Like to thank; Anna Muto Mary F. Striegel Curtis Desselles Charlotte Eng