FIVE-YEAR CORROSION OF ALUMINIUM ALLOYS AT SEVERAL MARINE SITES
EIGHT ALUMINUM ALLOYS WERE EXPOSED AT MARINE SITES AT KURE BEACH, NORTH CAROLINA, ARENZANO, ITALY, AND BOHUS-MALMON, SWEDEN. PANELS WERE REMOVED AT THE END OF 1-, 2- AND 5-YEAR EXPOSURE PERIODS AND EVALUATED FOR DEPT OF PITTING, CORROSION RATE AND LOSS OF MECHANICAL PROPERTIES. THE HIGH- PURITY ALUMINUM AND CERTAIN ALUMINUM-MAGNESIUM ALLOYS SHOWED THE LOWEST CORROSION RATES BASED ON WEIGHT LOSSES. THE SITE AT ARENZANO GENERALLY WAS MOST SEVERE AS REGARDS DEPTH OF PITTING AND WEIGHT LOSS WITH THE KURE BEACH, NORTH CAROLINA, 80-FOOT LOT NEXT IN SEVERITY. BOTH PIT-DEPTH GROWTH AND CORROSION RATE DECREASED WITH EXPOSURE TIME FOR ALL ALLOYS AND LOCATIONS. SEVERAL ALLOYS, AT THE MORE SEVERE SITES, SHOWED SOME DECREASES IN SOME MECHANICAL PROPERTIES AS MEASURED BY ELONGATION OF TENSILE SPECIMENS, BUT THESE CHANGES ARE NOT OF SUCH MAGNITUDE AS TO BE STRUCTURALLY SIGNIFICANT. ALUMINUM-MAGNESIUM ALLOYS 5050, 5052, 5086 AND 5154 ARE AMONG THE BEST FOR USE IN MARINE ENVIRONMENTS. THE STRUCTURAL ALLOY 6061 IS ALSO HIGHLY SATISFACTORY FOR MARINE ATMOSPHERES. A MAXIMUM PIT DEPTH FOR ALL ALLOYS OF ABOUT 15 MILS WAS FOUND AFTER FIVE YEARS AT ARENZANO AND ABOUT 9.5 MILS FOR THE SAME PERIOD AT KURE BEACH 80-FOOT LOT. /AUTHOR/
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Supplemental Notes:
- Vol 1, No 6, PP 237-243, 8 FIG, 5 TAB, 10 REF
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Authors:
- Ailor, W H
- Publication Date: 1966-5
Media Info
- Serial:
Subject/Index Terms
- TRT Terms: Aluminum alloys; Corrosion; Corrosion tests; Crash exposure; Magnesium alloys; Mechanical properties; Pitting; Seas; Weight
- Uncontrolled Terms: Exposure
- Old TRIS Terms: Marine atmospheres
- Subject Areas: Geotechnology; Highways; Materials; Safety and Human Factors;
Filing Info
- Accession Number: 00216332
- Record Type: Publication
- Files: TRIS
- Created Date: Aug 12 1970 12:00AM