| Title |
ALTERNATE PAINT SYSTEMS FOR OVERCOATING
|
| Accession No |
00812518 |
| Authors |
Tinklenberg, G L |
| Period Covered |
9406-9909 |
Corp. Authors
/ Publisher |
Corrosion Control Consultants and Labs, Inc.  ; New Hampshire Department of Transportation ; Federal Highway Administration
|
| Publication Date |
20001000 |
| Description |
v.p.;
Appendices(4); Figures; Photos |
| Languages |
English
|
| Abstract |
This research project was undertaken to test various generic types of currently available paint systems over existing coatings used on bridges. After acquiring the products, fifteen different paint systems were applied according to manufacturer instructions on beams removed from highway bridges and set up in a New Hampshire Department of Transportation maintenance yard. The five types of generic systems included alkyds, moisture-cure urethanes, epoxies, acrylics, and a calcium sulfonate system. These were compared to a control - a traditional lead-based paint system. The application data and climatic conditions were recorded as well as dry film thickness measurements. The exposed beams were observed for a period of four years, periodically rated and photographed. The periodic inspections included documentation of the type and extent of failure. The study resulted in nine basic conclusions regarding the tested paint systems. One conclusion is the fact that whenever an existing paint is overcoated, some failure must be expected and therefore periodic repairs will be necessary. The experimental exposures in this study also led the researchers to conclude that a three-coat moisture-cure urethane system can best be recommended for use over surfaces hand tool cleaned in a manner typical of field use. |
| TRT Terms |
Acrylic resins ; Alkyd resins ; Bridges ; Coatings ; Epoxy coatings ; Failure ; Inspection ; Lead based paint ; Paint ; Recommendations ; Thickness ; Urethane ; Weather conditions ; Weathering |
| Other Terms |
Calcium sulfonates |
| Subject Areas |
H34 GENERAL MATERIALS; I35 Miscellaneous Materials |
| Contract Number |
SPR-PL-PR-1(31) |
| Report Number |
Project 12323D,; Final Report |
| Availability |
National Technical Information Service |
| TRIS Files |
HRIS |
| Database |
TRIS Online |
TRT
