The properties of supercritical fluids make it an ideal alternative to traditional artifact restoration techniques. Conventional methods are costly, time consuming and often damage the artifact.
For restoring metallic objects, use subcritical water. Subcritical water has a higher diffusion rate and a lower viscosity than water under ambient temperatures. Corrosion goes deep into the pores of the metal. Surface tension and viscosity and transport properties become limiting factors with traditional restoration methods.
Subcritical Water Treatment - Results
Michael Drews, Professor Emeritus School of Materials Science & Engineering, Clemson University Warren Lasch Conservation Center in Charleston, S.C.
You have small amounts to process, or you need to perfect your method.