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

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%.

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Document Details

Document Type
Technical Report
Publication Date
Jan 31, 1993
Accession Number
ADA280914

Entities

People

  • B. N. Popov
  • Guorui Zheng
  • R. E. White

Organizations

  • University of South Carolina

Tags

DTIC Thesaurus Topics

  • Alloys
  • Cells
  • Corrosion
  • Corrosion Resistance
  • Current Density
  • Desorption
  • Diffusion
  • Diffusion Coefficient
  • Electrodes
  • Equations
  • Hydrogen
  • Hydrogen Embrittlement
  • Inhibition
  • Mechanical Properties
  • Metals
  • Steady State
  • Surface Properties

Readers

  • Materials Science and Engineering.
  • Thin Film Deposition Science.