Accession Number : AD0841860

Title :   APPLICATION OF THE POTENTIAL POLARIZATION IN THE STUDY AND IN THE METALLOGRAPHY OF CORROSION RESISTANT STEELS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s) : Cihal, Vladimir

Report Date : 03 NOV 1967

Pagination or Media Count : 37

Abstract : The study describes the application of potential polarization particularly for the study of corrosion resistant steels. The advantages of this method as compared to the current classical electrochemical method are evaluated. The characteristics of a potentiostat and the potential polarization curve with its significant regions are described. The application of the potentiostat is directed toward the study of the passivity of corrosion resistant steels, toward the study of the influence of alloy elements on the corrosion resistance and toward the quality testing of corrosion resistant steels. A procedure was found for the determination of the degree of differentiation of individual phases of corrosion resistant steels in electrolytic etching based on the comparison of their potential polarization curves. Potentials suitable for a selective etching of ferrite, austenite and phase sigma were determined. From the course of the polarization curve it is possible to select not only the manner of etching but also to identify roughly the phases present in the steel. (Author)

Descriptors :   *STEEL), (*CORROSION RESISTANT ALLOYS, (*METALLOGRAPHY, CORROSION RESISTANT ALLOYS), POLARIZATION, PHASE STUDIES, ETCHING, CZECHOSLOVAKIA.

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE