Accession Number : AD0431266

Title :   INVESTIGATION OF THE CORROSION RESISTANCE OF ALUMINUM-STEEL ASSEMBLIES EXPOSED TO SEA WATER -PART III: EVALUATION OF ONE-YEAR SAMPLES.

Descriptive Note : Progress rept. no. 21,

Corporate Author : KAISER ALUMINUM AND CHEMICAL CORP SPOKANE WASH

Personal Author(s) : Lowe,Thomas A.

Report Date : 20 MAR 1963

Pagination or Media Count : 35

Abstract : The first set of riveted, aluminum-steel assemblies was removed after exposure in tide-range immersion for one year. An evaluation of these assemblies was made on the basis of exterior appearance, the condition of faying surfaces, and a comparison of their breaking strength with unexposed, control samples. The results of this evaluation show that (1) there has been a small loss in the breaking strength of exposed assemblies, (2) the attack of faying surfaces is more a function of the protective paint and joint insulation system than of the rivet material or the aluminum alloy used in the assembly, and (3) significant attack of aluminum exterior surfaces by copper, deposited from the anti-fouling paint used, may cause significant damage of the samples still in test before completion of the program. (Author)

Descriptors :   (*ALUMINUM ALLOYS, CORROSION), (*STEEL, CORROSION), RIVETED JOINTS, SEA WATER, TENSILE PROPERTIES, SHEAR STRESSES, PROTECTIVE TREATMENTS, PAINTS, ANTIFOULING COATINGS, COPPER, ELECTROLYTIC CELLS, RIVETS, METAL COATINGS, ALUMINUM COATINGS, ZINC COATINGS, SHIP STRUCTURAL COMPONENTS

Distribution Statement : APPROVED FOR PUBLIC RELEASE