Investigation of ammonium oxalate diffusion in carbonatic substrates by neutron tomography

The diffusion of the organic-polymeric or inorganic-mineral products inside a decayed porous material is a key factor for the evaluation of the efficacy of a conservation treatment. Here, we present a study aimed at the evaluation of neutron imaging as a non-destructive tool for the investigation of stones treated with ammonium oxalate, an inorganic-mineral product. Neutron tomography gained an overview of products diffusion and deep insight into the interaction between product and crystalline matrix.