Search
Filters
Close

01544 THE EFFECTS OF WIND ON LOCAL ATMOSPHERIC CORROSIVITY

Product Number: 51300-01544-SG
ISBN: 01544 2001 CP
Author: R.D. Klassen and P.R. Roberge
$0.00
$20.00
$20.00
The influence of wind effects on local atmospheric corrosivity was measured and modeled. Six sets of CLIMAT units were placed among devices that provided various degrees of wind sheltering near a deiced highway. Although each set was exposed to the same relative humidity, there was a 34-fold difference between the average mass loss of the most wind-protected and the least wind-protected sets. This is consistent with the concept that atmospheric corrosion rates depend primarily on salt aerosol deposition rates, which in turn depend on local wind velocity and turbulence patterns. Therefore barriers that reduce the wind velocity and turbulence intensity reduce aerosol deposition rates and consequently corrosivity rates. Detailed modeling of the wind flow patterns around two of the CLIMAT sets confirmed that the corrosivity differences were due to aerosol deposition effects. Terminology could be modified to better reflect the localized nature of atmospheric corrosivity. It is suggested that macrocorrosivity refer to the characterization of an area that is on the scale of kilometres such as a city or county; that microcorrosivity refer to the characterization of locations that are on the scale of meters such as different sites near a building or vehicle; and that nanocorrosivity refer to characterizing spots that are on the scale of centimetres. Keywords: local atmospheric corrosivity, airflow modeling, CLIMAT coupons, microcorrosivity, nanocorrosivity
The influence of wind effects on local atmospheric corrosivity was measured and modeled. Six sets of CLIMAT units were placed among devices that provided various degrees of wind sheltering near a deiced highway. Although each set was exposed to the same relative humidity, there was a 34-fold difference between the average mass loss of the most wind-protected and the least wind-protected sets. This is consistent with the concept that atmospheric corrosion rates depend primarily on salt aerosol deposition rates, which in turn depend on local wind velocity and turbulence patterns. Therefore barriers that reduce the wind velocity and turbulence intensity reduce aerosol deposition rates and consequently corrosivity rates. Detailed modeling of the wind flow patterns around two of the CLIMAT sets confirmed that the corrosivity differences were due to aerosol deposition effects. Terminology could be modified to better reflect the localized nature of atmospheric corrosivity. It is suggested that macrocorrosivity refer to the characterization of an area that is on the scale of kilometres such as a city or county; that microcorrosivity refer to the characterization of locations that are on the scale of meters such as different sites near a building or vehicle; and that nanocorrosivity refer to characterizing spots that are on the scale of centimetres. Keywords: local atmospheric corrosivity, airflow modeling, CLIMAT coupons, microcorrosivity, nanocorrosivity
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 03592 SEASONAL CHANGES IN ATMOSPHERIC CORROSIVITY
Available for download

03592 SEASONAL CHANGES IN ATMOSPHERIC CORROSIVITY

Product Number: 51300-03592-SG
ISBN: 03592 2003 CP
Author: R.D. Klassen, P.R. Roberge, H. Nyugen, P.W. Haberecht
$20.00
Picture for 00405 AN ADVANCED ATMOSPHERIC CORROSION
Available for download

00405 AN ADVANCED ATMOSPHERIC CORROSION MEASUREMENT SYSTEM

Product Number: 51300-00405-SG
ISBN: 00405 2000 CP
Author: Philippe Kempe, Allen Denzine, and Eugen Tiefnig
$20.00
Picture for Corrosion Protection of Offshore Wind Foundations
Available for download

51315-5896-Corrosion Protection of Offshore Wind Foundations

Product Number: 51315-5896-SG
ISBN: 5896 2015 CP
Author: Anders Black
Publication Date: 2015
$20.00