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A study of large sets of ASTM G 84 time-of-wetness sensors

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1520/STP39194S
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Affiliation
  1. National Research Council of Canada
FormatText, Book Chapter
Subjecttime-of-wetness; TOW; moisture sensor; corrosion; metals; atmosphere; humidity; measurement; calibration
Abstract
Three sets of 32 to 39 ASTM time-of-wetness G 84-84 sensors were exposed during summer and winter in Montreal. For the summer periods, all sensors responded well to rain but had a very different sensitivity to dew, with some sensors never responding to dew. For the winter period all sensors responded well to condensation below the freezing point. The ASTM sensor selection criteria are sound for atmospheres having a small dew time-of-wetness compared to the rain time-of-wetness. For atmospheres having a large dew time-of-wetness, the sensors should be tested in order to discard those which are not very sensitive to the dew. A sensitivity factor for each sensor within a given set can be determined experimentally in order to increase the precision of the time-of-wetness values.
Publication date
PublisherASTM
In
  • Corrosion Testing and Evaluation: Silver Anniversary Volume: 260–278.
LanguageEnglish
Peer reviewedYes
NRC numberNRCC 30341
NRC-IGM89TC-202-893-G
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Record identifier55da8f95-a99b-4ed4-83f5-6e856379f67a
Record created2020-04-08
Record modified2020-06-10
Date modified: