Salt, Dust and RH Risks in Coastal and Inland Areas

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Salt, Dust and RHRisks in Coastal and Inland
Areas

• David Thickett
• Collections Management Team

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Telephone Exchange
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Telephone Repeater
surface coverage 14 81
weight loss (mg/cm2) 0.1 0.9
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Airborne Dust
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Surface wetness sensor
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Surface wetness results
Critical RH 53
Repeater 50
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Shield Untreated
Telephone [phone]
Repeater 0.018 (98.1) 0.934
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Environment Under Tyvek
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Chloride Deposition Rate(30 days)
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Case Fabric Chloride
(µg/m2/day)
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2.12
Cl 0.19
FeO0.833(OH)1.167Cl0.167 6.9Cl
Stahl, Corr. Sci, 2003
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Surface Analysissilver coupons 30 days
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Thickett, Hallett, Bradley and Lee Hildesheim, in
press
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Chloride Sources

• Gaseous
• Dust
• Handling
• Use
• Conservation Treatments
• Post excavation cleaning (coins)

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Anion Deposition Rate
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Werner Collection Cases at Rangers House
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Acknowledgements

• University College London
• Centre for Sustainable Heritage (Bartlett School
  of Architecture)
• Department of Geology
• Royal Historic Palaces
• Museum of London