Accession Number : AD0762074

Title :   Effect of Applied Electric Fields on the Mechanisms of Oxidation of Metals and Alloys.

Descriptive Note : Final rept. 18 Dec 71-18 Dec 72,

Corporate Author : LITTLE (ARTHUR D) INC CAMBRIDGE MASS

Personal Author(s) : Berkowitz,Joan B. ; Lee,W. David ; Peters,Edward T. ; Lyle,William E.

Report Date : 18 DEC 1972

Pagination or Media Count : 67

Abstract : The effect of an applied electric field on oxidation/hot corrosion was investigated in a molten salt of Na2SO4 and in a salt seeded propane air flame. Nichrome metal strips were used in the investigation of the effect of applied electric fields on corrosion. Marked reduction on the level of corrosion was demonstrated with the anodic electrode in the salt bath at a threshold applied current level of 1.39 ma/sq. The chromium content of the alloy appears to play a critical role in promoting the anodic protection, nickel alone is insufficient. An effect of an applied electric field on corrosion in a salt seeded flame was observed. At the anode, scanning electron probe measurements verify that the oxide ion loses electrons and hence the oxide activity is reduced relative to the sulfur activity. (Author)

Descriptors :   (*CORROSION, ELECTRIC FIELDS), OXIDATION, NICKEL ALLOYS, CHROMIUM ALLOYS, REACTION KINETICS, CORROSION INHIBITION, GAS TURBINE BLADES

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE