- Author
- Moore, D. G. | Harrison, W. N.
- Title
- Fifteen-Year Exposure Test of Porcelain Enamels.
- Coporate
- National Bureau of Standards, Washington, DC
- Report
- BMS 148, June 28, 1957, 15 p.
- Keywords
- enamels | weather effects | exposure | tests | acid resistance | cleaning
- Abstract
- The weather resistance of 768 panels representing 14 types of enamel was evaluated after 15 years of exposure at Washington, DC; St. Louis, MO; Lakeland, FL; and Atlantic City, NJ. Changes in gloss and color were taken as criteria of weather resistance. A direct relation existed between acid resistance and weather resistance, except that a few of the red enamels of good acid resistance showed a pronounced fading after exposure. A modified acid-resistance test was devised that separated red enamels that showed pronounced fading from those that were highly resistant to color change. The ease of cleaning was related to the weather resistance, the enamels that lost most of their intiial gloss on weathering being more difficult to clean than those that showed high gloss retention. All of the enamels protected the steel from corrosion when initial coverage was complete. Except for a relatively few enamels, variations in climate at the four exposure sites had only a minor effect on their weathering behavior.