Accession Number:

ADA280914

Title:

Surface Treatment for Inhibition of Corrosion and Mitigation of Hydrogen Absorption into Inconel 718. Number 2

Descriptive Note:

Rept. for 1 Feb 1992-31 Jan 1993

Corporate Author:

SOUTH CAROLINA UNIV COLUMBIA

Personal Author(s):

Report Date:

1993-01-31

Pagination or Media Count:

43.0

Abstract:

Polarization experiments show that monolayers of zinc, bismuth and lead inhibit effectively the hydrogen evolution reaction and hydrogen penetration through Inconel-718. The observed inhibition effects are due to the kinetic limitations of the hydrogen discharge reaction and suppression of hydrogen absorption on the deposited monolayers. The measured hydrogen penetration into a Inconel-718 membrane as determined by the Devanathan - Stachurski bipolar electrode technique, is suppressed due to the lower binding energy of hydrogen adatoms on lead, bismuth and zinc adsorbates. It is shown that the best inhibition of the hydrogen permeation rate through an Inconel-718 membrane is obtained by a potentiostatically deposited bismuth monolayer which reduces the steady state hydrogen flux by 76.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry
  • Properties of Metals and Alloys
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE