Dehumidification drying of red oak. 2. Cause of cooling coils corrosion in heat pumps

Dehumidification kiln-drying of red oak lumber resulted in the corrosion of cooling coils in a laboratory kiln. Cooling coils in industrial kilns protected by anti-corrosion finishes did not exhibit any signs of corrosion. Laboratory kiln-drying condensates were characterized by a bluish tinge and p...

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Bibliographic Details
Published in:Forest products journal 1999, Vol.49 (9), p.33-36
Main Authors: Solliday, D, Dawson-Andoh, B.E, Renton, J.J, Armstrong, J.P, Jagodzinski, P, Coyle, C.M
Format: Article
Language:English
Subjects:
acetates (salts)
chemical analysis
components
condensates
cooling
copper
copper acetate monohydrate
crystals
dehumidification
fallow
heat pumps
kiln drying
kilns
lumber
Quercus
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Summary:Dehumidification kiln-drying of red oak lumber resulted in the corrosion of cooling coils in a laboratory kiln. Cooling coils in industrial kilns protected by anti-corrosion finishes did not exhibit any signs of corrosion. Laboratory kiln-drying condensates were characterized by a bluish tinge and produced blue crystals upon evaporation. X-ray diffraction analysis of the kiln condensate blue crystals identified them as copper acetate monohydrate. This identification was further supported by Fourier transform infrared and UV-visible spectra of condensate crystals.
ISSN:0015-7473