Price, C and Brimblecombe, P (1994) Preventing salt damage in porous materials. In: Preventive conservation: practice, theory and research. Preprints of the contributions to the Ottawa Congress, 12-16 September 1994. International Institute for Conservation of Historic and Artistic Works, pp. 90-93.

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Abstract

Salt damage in porous materials may be prevented by appropriate control of the ambient relative humidity. Crystallization and hydration occur only at particular relative humidities, and damage can be prevented by keeping the ambient relative humidity above or below these critical values. While the critical relative humidities for single salts are well known, the behavior of salt mixtures is more complex. The authors examine some of the principles concerning crystallization from solutions containing more than one salt. They use a computer program to calculate the relative humidity of air in equilibrium with any given mixed salt solution and show that crystallization does not occur at the equilibrium relative humidity of each component salt, but across a range of relative humidities. The implications for passive conservation are discussed, using a number of examples which demonstrate some unexpected features.

Item Type:	Book Section
Uncontrolled Keywords:	Salt; Salt crystallisation; Relative humidity; Preventive conservation; Simulation; Porous materials
Subjects:	?? Salt ?? ?? climcon ?? English > Damage functions > Salt damage
Depositing User:	Anna Samuelsson
Date Deposited:	27 Mar 2008 10:54
Last Modified:	04 Apr 2017 12:50
URI:	http://eprints.sparaochbevara.se/id/eprint/129

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