2011 PhD candidate – School of Materials Science and Engineering, Clemson University, USA
2002 Chemical Engineer (Masters equivalent) - Universidad de la República, Montevideo, Uruguay
1998 BS (Chemistry) - Universidad de la República, Montevideo, Uruguay
In 2002, Néstor joined the Hunley Project researching new technologies for the conservation of maritime archaeological artifacts. In 2003, he began testing and developing the application of subcritical fluids in the conservation field. Using his engineering background Néstor designed the 40L subcritical reactor currently in use at the WLCC. Néstor has worked with supercritical CO2 for the stabilization of waterlogged cork, and developed analytical procedures for the evaluation of treatments applied in conservation. As part of his research, Néstor has applied sub and supercritical fluids for the stabilization of materials belonging to different projects and organizations such as the Hunley Project, National Parks Service, USS Monitor Project, Drayton Hall Plantation, Parks Canada, Castello Formigine, and the Archaologische Staatssammlung Munchen among others. He has also focused in the used of micro-Raman spectroscopy for the characterization of corrosion products and other inorganic and organic materials.
As part of a new distance learning pilot program, Néstor is currently enrolled in the PhD program at the School of Materials Science and Engineering at Clemson University, under the direction of Dr. Thompson Mefford. His graduate work investigates the behavior of monocrystalline silicon subjected to water solutions in the sub and supercritical regions.
While studying in Uruguay, Néstor worked with the underwater archaeological team at the Uruguayan National Heritage Office (Comisión del Patrimonio Cultural de la Nación). He also was plant engineer for PepsiCo Americas Foods in Montevideo, Uruguay, supervising production processes and designing equipment.
His research interests include sub and supercritical fluids, corrosion processes and corrosion prevention, non-destructive testing and materials characterization. Néstor is also interested in mesoporous materials, surface modification, materials used to generate energy from alternatives sources, and energy storage systems.
González-Pereyra, Néstor; Cretté, Stéphanie; Mefford, O. Thompson. “Etching of Silicon under Subcritical Conditions: A Greener Approach”. Proceedings of the 10th International Symposium on Supercritical Fluids, May 13-16, 2012; San Francisco, CA, USA. (In press).
Cretté, S.A.,Näsänen, L., González-Pereyra, N. G., Rennison, B. Conservation and Treatment Monitoring of Waterlogged Archeological Corks Using Supercritical CO2”. Proceedings of the 10th International Symposium on Supercritical Fluids, May 13-16, 2012; San Francisco, CA, USA. (In press).
Näsänen, L., González-Pereyra, N. G., Cretté, S.A., DeViviés, P. The Applicability of Subcritical Fluids to the Conservation of Actively Corroding Metallic Cultural Heritage”. Proceedings of the 10th International Symposium on Supercritical Fluids, May 13-16, 2012; San Francisco, CA, USA. (In press).
Drews, M. J.; de Viviés, P.; González, N.; and Mardikian, P. “The Application of Sub-critical Solutions for the Stabilization of Archaeological Iron”. (Manuscript in submitted to Studies in Conservaton)”
Näsänen L.M.E.; González-Pereyra N.G.; Cretté S.A. “The Subcritical Mass-Treatment of a Range of Iron Artifacts from Varying Contexts” Proceedings on the Asia-Pacific Regional Conference on Underwater Cultural Heritage. Manila, Philippines. November 2011. 733-744.
González, Néstor; Brocard, Typhaine; Cretté, Stéphanie; de Viviés, Philippe; Drews, Michael; Mardikian, Paul. “The use of subcritical fluids for the stabilization of concreted iron artifacts”. Proceedings of the ICOM-CC International Conference on Metals Conservation. Charleston, South Carolina, USA, 11-15 October 2010: 39-49
Cretté, S.; González, N.; Rennison, B. ; Scafuri, M. ; Mardikian, P. ; Drews, M.; Carrier, M. « Conserving Waterlogged Archaeological Corks Using Supercritical CO2 and Monitoring Their Shrinkage Using Structured-Light 3D Scanning ». 11th ICOM-CC Group on Wet Organic Archaeological Materials Conference. North Carolina Department of Cultural Resources and East Carolina University May 24-28, 2010: 257-275
Mardikian, P.; Cretté, S.A.; Drews, M.; González, N.G.; Rivera, J.; Tindal, C. 2009. Connecting Materials Science and Engineering with Archaeological Conservation. AIC 37th Annual Meeting. In press.
Gonzalez, Néstor; Cook, Desmond; de Viviés, Philippe; Drews, Michael; Mardikian, Paul. “The effects of cathodic polarization, soaking in alkaline solutions and subcritical water on cast iron corrosion products”. Proceedings of the ICOM-CC International Conference on Metals Conservation. Amsterdam (2007): 32-37
Mardikian, P.; González, N.; Drews, M. J.; de Viviés, P. “New Perspectives Regarding the Stabilization of Terrestrial and Marine Archaeological Iron”. Iron, steel & steamship archaeology: Proceedings of 2nd Australian seminar held in Perth, Melbourne and Sydney, 2006. Editor M. McCarthy. (2009): 113-118
de Vivies, Philippe; Drews, Michael; Gonzalez, Néstor; Mardikian, Paul; Cook, Desmond; Memet, Jean-Bernard. “Transformation of akaganeite in archaeological iron artefacts using subcritical treatment.” Proceedings of the ICOM-CC International Conference on Metals Conservation. Amsterdam (2007): 26-30.
Mardikian, P.; Drews, M. J.; González, N.; de Viviés, P.; Hunter J.W. “Searching for a Diamond in the Rust: A Review of Large-Scale Archaeological Iron Conservation Projects, 1980-2006”. Iron, steel & steamship archaeology: Proceedings of 2nd Australian seminar held in Perth, Melbourne and Sydney, 2006. Editor M.McCarthy. (2009): 82-88
Drews, M. J.; Green, J.; Hemmer, J.; de Viviés, P.; Néstor G. González, N., and Mardikian, P. “Conservation of Waterlogged Cork using Supercritical C02 Drying”. Conservation of Archaeological Materials: Current Trends and Future Directions – BAR International Series 2116 2005. London, England: Archaeopress. p. 97-102
Drews, M. J.; de Viviés, P.; González, N.; and Mardikian, P. “A study of the analysis and removal of chloride in samples from the Hunley”. Proceedings of the ICOM-CC International Conference on Metals Conservation. Canberra, Australia 4-8 October 2004. Published by National Museum of Australia, Canberra. J. Ashton, D. Hallam, (eds.). (2004): 247-260.
González, N.; de Vivies, P.; Drews, M. J.; and Mardikian, P. “Hunting Free and Bound Chloride in the Wrought Iron Rivets from the American Civil War Submarine H. L. Hunley”. Journal of the American Institute for Conservation. JAIC 43 (2004): 161-174
González, N.; de Viviés, P.; Drews, M.; Mardikian, P. “Characterizing the Chloride in the Wrought Iron Rivets from the Hunley” NACE Conference, Northern Area Eastern, Preservation of Heritage Artifacts Session. Sept 15-17, Ottawa, Canada. Proceedings on CD, 2003
Professional society activity:
Member of NACE International, 2008ff
Member of International Council on Monuments and Sites, 2000ff
Néstor, now an American citizen, lives in Park Circle, North Charleston, where he is deeply involved with his community.: