Saturated salt solutions for calibrating humidity meters at elevated pressures

Ivashchenko, V. E.; Rudykh, I. A.; Kolomyitsev, V. P.; Simulik, M. D.; Belashitskii, A. P.; Платонов, А. А.

doi:10.1007/bf00815223

Cited by 2 publications

(1 citation statement)

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“…5. However, for a constant relative humidity, the partial vapor pressure increases with pressure, whereas the dew point slightly decreases [27,28]. Figure 6 shows the saturation moisture content and the rate of absorption plotted against the partial pressure for φ = 80 % at 60 • C. The vapor pressure of liquid water (when the sample is immersed) is calculated [29] as the vapor pressure exerted by pure water at 60 • C which is close to the partial vapor pressure of moist air when φ = 100 % at 60 • C. The saturation moisture content and the rate of moisture absorption increased with increasing vapor pressure of the test condition.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Pressure on Moisture Diffusion in Polymer Matrix Composites

Pilli

Smith

2012

Int J Thermophys

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Temperature and humidity play a significant role in the mechanical behavior and long-term durability of polymer matrix composites (PMCs). Several standard test methods including some accelerated test methods involving higher temperatures and pressures are available for environmental qualification of these PMCs. While the effect of temperature on humidity diffusion has been studied extensively, the effect of pressure has received less attention. This study seeks to interrogate the effect of pressure on diffusion. This effect was observed by building test chambers designed to maintain a constant relative humidity of 80 % at 60 • C at three different pressures (0.1014 MPa, 0.5171 MPa, and 1.0342 MPa). A liquid water immersion test chamber at 60 • C was also considered. It was observed that the time to saturation and the saturation moisture content increased with increasing chamber pressure. Immersion in liquid water provided the upper bound for the maximum moisture saturation and a lower bound for the time to saturation.

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Section: Resultsmentioning

confidence: 99%