Investigation of the effects of acid deposition on materials. Final report

Technical Report · Sun Oct 01 04:00:00 EDT 1989

OSTI ID:7153352

Vijayakuma, R; Mansfeld, F; Henry, R

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

Related Subjects

29 ENERGY PLANNING, POLICY, AND ECONOMY
290300 -- Energy Planning & Policy-- Environment
Health
& Safety
36 MATERIALS SCIENCE
360604 -- Materials-- Corrosion
Erosion
& Degradation
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ACID RAIN
AEROSOLS
AIR POLLUTION
ATMOSPHERIC PRECIPITATIONS
BUILDING MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COLLOIDS
CORROSION
CORROSIVE EFFECTS
DISPERSIONS
DOCUMENT TYPES
ECONOMIC IMPACT
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MATERIALS
MATHEMATICS
NITRIC ACID
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
OZONE
POLLUTION
PROGRESS REPORT
RAIN
REGRESSION ANALYSIS
SEASONAL VARIATIONS
SOLS
STATISTICS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
VARIATIONS