Accession Number : ADA018343

Title :   A Means of Inhibiting Hydrogen Entry into Steel.

Descriptive Note : Technical rept.,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF MATERIALS SCIENCE

Personal Author(s) : Chatterjee,S. S. ; Pickering,H. W.

Report Date : NOV 1975

Pagination or Media Count : 5

Abstract : When the cathodic charging current density is switched from 2mA/sq cm to 100 mA/sq cm, the permeation current through iron alloy sheet specimens at first rises as expected, but then suddenly decreases. If the current is switched off for approx. 0.5hr, the greatest inhibition of hydrogen entry is observed. The inhibition is only observed when the solution contains chloride ions and cathodic poisons like As (3+), Sn(4+), S(2+), or I(+). (Author)

Descriptors :   *STEEL, *IRON ALLOYS, HYDROGEN EMBRITTLEMENT, HYDROGEN, PERMEABILITY, KINETICS, ANNEALING, CONTAMINATION, ELECTROLYTES, ELECTROLYTIC CELLS, ELECTRIC CURRENT, CURRENT DENSITY, IONS, CATHODES(ELECTROLYTIC CELL), ANODES(ELECTROLYTIC CELL), ARSENIC, TIN, SULFUR, IODINE, INHIBITION

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE