| Main Title |
Removal of CaCO3 Extender in Residential Coatings by Atmospheric Acidic Deposition. |
| Author |
Miller, W. C. ;
Fornes, R. E. ;
Gilbert, R. D. ;
Speer, A. ;
Spence, J. ;
|
| CORP Author |
North Carolina State Univ. at Raleigh.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. |
| Publisher |
1992 |
| Year Published |
1992 |
| Report Number |
EPA-R-814121; EPA/600/A-92/243; |
| Stock Number |
PB93-120996 |
| Additional Subjects |
Air pollution effects(Materials) ;
Calcium carbonates ;
Paints ;
Physical radiation effects ;
Ultraviolet radiation ;
Sampling ;
Exposure ;
Materials tests ;
Test chambers ;
Optical microscopy ;
Environmental effects ;
Scanning electron microscopy ;
X ray diffraction ;
Crystals ;
Surface properties ;
Energy dispersive spectroscopy
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB93-120996 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
8p |
| Abstract |
The removal and fate of CaCO3 extender in latex and alkyd paints upon exposure of paint films to UV and atmospheric pollutants generated in a large environmental chamber were studied using optical and scanning electron microscopy in combination with energy dispersive spectroscopy. X-ray mapping of film cross sections was used to examine migration of calcium to the film surface, and x-ray diffraction and Energy Dispersive Spectroscopy (EDS) were employed to determine crystalline nature of surface deposits. Crystals of various forms of calcium sulfate formed on paint surfaces. Surprisingly, migration of calcium to the paint surface occurred in the absence of liquid water in the form of dew. |
