Accession Number : AD0909404

Title :   The Corrosion of Metals in Aqueous Film-Forming Foams.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Smith, J. A. ; Peterson, M. H.

Report Date : 28 MAR 1973

Pagination or Media Count : 28

Abstract : A research program was initiated primarily to investigate the corrosion susceptibility of Type 304 stainless steel shipboard firefighting systems to aqueous film-forming foam (AFFF) concentrate. Subsequently, other candidate alloys for use in such systems were also studied. To assess corrosion behavior a special laboratory technique was devised with which localized corrosion was stimulated by an intentional crevice. Weight-loss measurements, surface examination techniques, and potentiostatic polarization studies were utilized also to determine the effects and relationships of media pH and chloride-ion content on corrosivity. The results of these studies indicate that the synergetic effects of low pH and high chloride-ion content caused accelerated localized attack in Type 304 stainless steel. This high degree of corrosivity was not evident in the AFFF (200) series formulation. (Author)

Descriptors :   *CORROSION), (*FIRE EXTINGUISHERS, STAINLESS STEEL), (*STAINLESS STEEL, (*FOAM, CORROSION), PH FACTOR, CHLORIDES, FLUORIDES, STEEL, NICKEL ALLOYS, COPPER ALLOYS, NAVAL EQUIPMENT, AIRCRAFT CARRIERS, SEA WATER, COMPATIBILITY.

Subject Categories : Properties of Metals and Alloys
      Safety Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE