Investigation of the effects of acid deposition on materials. Final report
The objective of the project was to determine damage functions which relate the atmospheric corrosion losses to the concentration of the pollutants which are routinely monitored. The materials investigated in the study were chosen based on the economic importance and included galvanized steel, nickel, aluminum, two types of flat latex exterior housepaint, nylon fabric, polyethylene and concrete. Atmospheric data were provided by ARB's air monitoring network at the three test sites in Southern California. The results from the field sites have been supported by laboratory tests in which corrosion damage was determined. The samples were exposed to SO2, NO2, or O3 and the combinations and to HNO3 aerosol of two different concentrations and flow rates. Corrosion rates determined by weight loss for galvanized steel, nickel, aluminum and latex paint containing some carbonate extender were higher in the summer than in the winter despite the fact that moisture and primary pollutant levels are higher in the winter. The corrosion rates for galvanized steel which has served as a benchmark material in most atmospheric exposure tests were very low and similar to rates which are usually observed at clean, rural areas. Damage functions were determined by regression of the corrosion rates against the explanatory variables which in the study were O3, NO2, T60, O3xT60, NO2xT60 and O3xNO2 averaged over the exposure T60 is the time for which the RH exceeded 60%.
- Research Organization:
- Environmental Monitoring and Services, Inc., Camarillo, CA (USA)
- OSTI ID:
- 7153352
- Report Number(s):
- PB-90-158973/XAB
- Country of Publication:
- United States
- Language:
- English
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36 MATERIALS SCIENCE
29 ENERGY PLANNING
POLICY AND ECONOMY
ACID RAIN
ECONOMIC IMPACT
BUILDING MATERIALS
CORROSION
AEROSOLS
AIR POLLUTION
CORROSIVE EFFECTS
NITRIC ACID
NITROGEN DIOXIDE
OZONE
PROGRESS REPORT
REGRESSION ANALYSIS
SEASONAL VARIATIONS
SULFUR DIOXIDE
ATMOSPHERIC PRECIPITATIONS
CHALCOGENIDES
CHEMICAL REACTIONS
COLLOIDS
DISPERSIONS
DOCUMENT TYPES
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MATERIALS
MATHEMATICS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION
RAIN
SOLS
STATISTICS
SULFUR COMPOUNDS
SULFUR OXIDES
VARIATIONS
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
360604 - Materials- Corrosion
Erosion
& Degradation
290300 - Energy Planning & Policy- Environment
Health
& Safety