Fundamental Corrosion Studies: Hydrogen Embrittlement.
Abstract
The electrochemical permeation method was extended by analysis of the decay transient following steady state permeation. From the amount of extracted hydrogen compared with the amount predicted by the permeation model, it is postulated that hydrogen diffusivity in Armco iron is concentration dependent. Permeation studies of cold-rolled Armco iron indicate (a) diffusivity D(21C) decreases from, 5 x 10 to the -5th to 0.5 x 10 to the -5th sq cm/sec. in going from annealed to 2% reduced samples; (b) deformation results in increasing absorption of hydrogen from 1 x 10 to the -8th to 300 x 10 to the -8th mole H/c.c. of Fe., in going from zero to 17.6% reduction in thickness; (c) additional cold work produces little further change in hydrogen absorbed or in apparent diffusivity. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1970
- Accession Number
- AD0715807
Entities
People
- Leonard Nanis
- T. K. G. Namboodhiri
Organizations
- University of Pennsylvania