EVALUATION OF PAINTS FOR STRUCTURAL STEEL-NORMAL ATMOSPHERE

VARIOUS PAINT SYSTEMS WERE STUDIED IN AN EFFORT TO MINIMIZE THE CORROSION PROBLEM WHICH EXISTS IN LOUISIANA. THE MAJOR FINDINGS ARE PRESENTED, INCLUDING THOSE FROM A CORRELATED STUDY OF FIELD AND ACCELERATED EXPOSURES. EMPHASIS WAS PLACED ON THE ACTUAL CORRELATION OF FIELD AND ACCELERATED EXPOSURES OF PAINT FILMS AND EVALUATING THE BEST PAINT SYSTEM. RESULTS INDICATED THE FOLLOWING: (1) LOUISIANA DEPARTMENT OF HIGHWAY (LDH) SPECIFICATION OF THREE COATS OF RED LEAD, MIL THICKNESS 4.5 AND ONE COAT OF ALUMINUM, MIL THICKNESS 1.0, MAY BE REDUCED TO TWO COATS OF RED LEAD, MIL THICKNESS 4.0, AND ONE COAT OF ALUMINUM, MIL THICKNESS 1.0, AND YIELD EXCELLENT PROTECTION. (2) THE CORRELATION OF WEATHEROMETER EXPOSURE TO FIELD EXPOSURE IS AS FOLLOWS: BATON ROUGE AREA - ONE HOUR WEATHEROMETER EXPOSURE = 15 HOURS FIELD EXPOSURE; CHASE AREA - ONE HOUR WEATHEROMETER EXPOSURE = 17 HOURS FIELD EXPOSURE; AND HOUMA AREA - ONE HOUR WEATHEROMETER EXPOSURE = 16 HOURS FIELD EXPOSURE. (3) THE MOST ECONOMICAL PAINT SYSTEM STUDIED FOR STRAIGHT ATMOSPHERIC EXPOSURE WAS LDH SPECIFICATION RED LEAD PRIMER AND LDH SPECIFICATION ALUMINUM TOPCOAT, BASED MAINLY UPON THE ABILITY OF THE ALUMINUM TOPCOAT TO REPEL ULTRA-VIOLET LIGHT WAVES. (4) THE FIELD EXPOSURE IN NORTHERN AND CENTRAL LOUISIANA APPEARS TO BE LESS SEVERE THAN IN SOUTHERN LOUISIANA. /BPR/

• Supplemental Notes:
  • Hpr, 63-1ch
• Corporate Authors:

  Louisiana Department of Highways

  P.O. Box 44245, Capitol Station
  Baton Rouge, LA  United States  70804

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Azar, D G
• Publication Date: 1969-5

Subject/Index Terms

• TRT Terms: Accelerated tests; Aluminum; Correlation analysis; Corrosion protection; Corrosion tests; Evaluation; Field tests; Paint; Primers; Protective coatings; Specifications; Structural steel
• Old TRIS Terms: Red lead
• Subject Areas: Data and Information Technology; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00215917
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS, STATEDOT
• Created Date: Apr 16 1970 12:00AM