Reducing SS 304/316 hydrogen outgassing to 2x10{sup -15} torr l/cm{sup 2} s

Journal Article · Sun Jul 15 00:00:00 EDT 2007 · Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films

DOI:https://doi.org/10.1116/1.2734151· OSTI ID:20979485

Sasaki, Y Tito ^[1]

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1. Quantum Mechanics Corp., 21885 8th Street East, P.O. Box 1885, Sonoma, California 95476 (United States)

Significant reduction in the outgassing rate of 300-series stainless steel is routinely attained through combination of electropolishing and vacuum baking. Preferential removal of Ni, Fe, and Mn from the surface of stainless steel by electropolishing creates a chromium-enriched surface. It also reduces the atomic surface area of the work piece closer to its geometric surface area. When the material is vacuum fired to remove interstitial hydrogen, the resultant stainless steel exhibits an outgassing rate of about 2x10{sup -15} torr l/cm{sup 2} s, as well as drastically reduced adsorption, absorption, and catalytic behaviors.

• OSTI ID: 20979485
• Journal Information: Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films, Journal Name: Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films Journal Issue: 4 Vol. 25; ISSN 1553-1813
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
ADSORPTION
BAKING
CATALYSIS
CHROMIUM
DEGASSING
ELECTROPOLISHING
HYDROGEN
INTERSTITIALS
REDUCTION
STAINLESS STEELS
SURFACE AREA
SURFACES