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Title: Development of a passivated stainless steel surface

Abstract

A multi-step Q-passivation method for stainless steel is described. The method includes a first high voltage electropolishing step followed by as separate low voltage chromium enhancement step. The method can also include a vacuum heat treatment step that utilizes a cyclic ramp-up period so as to maintain a relatively low pressure and low temperature throughout the step. The method can also include a controlled oxidation step during which the surface is contacted with an oxygen/inert gas mixture at low oxygen partial pressure.

Inventors:
;
Issue Date:
Research Org.:
Savannah River Site (SRS), Aiken, SC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1600197
Patent Number(s):
10450668
Application Number:
15/484,210
Assignee:
Savannah River Nuclear Solutions, LLC (Aiken, SC)
Patent Classifications (CPCs):
C - CHEMISTRY C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES C25F - PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS
DOE Contract Number:  
AC09-08SR22470
Resource Type:
Patent
Resource Relation:
Patent File Date: 04/11/2017
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Korinko, Paul S., and Wyrwas, Richard B. Development of a passivated stainless steel surface. United States: N. p., 2019. Web.
Korinko, Paul S., & Wyrwas, Richard B. Development of a passivated stainless steel surface. United States.
Korinko, Paul S., and Wyrwas, Richard B. Tue . "Development of a passivated stainless steel surface". United States. https://www.osti.gov/servlets/purl/1600197.
@article{osti_1600197,
title = {Development of a passivated stainless steel surface},
author = {Korinko, Paul S. and Wyrwas, Richard B.},
abstractNote = {A multi-step Q-passivation method for stainless steel is described. The method includes a first high voltage electropolishing step followed by as separate low voltage chromium enhancement step. The method can also include a vacuum heat treatment step that utilizes a cyclic ramp-up period so as to maintain a relatively low pressure and low temperature throughout the step. The method can also include a controlled oxidation step during which the surface is contacted with an oxygen/inert gas mixture at low oxygen partial pressure.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {10}
}

Works referenced in this record:

Method for treating carbon steel cylinder
patent, February 1992


Apparatus for electrochemical finishing of stainless steel
patent, October 1978


Hydrogen permeation resistant barrier
patent, February 1982


Hydrogen permeation protection for metals
patent, November 1985