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Electrochemical polarization behavior of sensitized SUS 304 stainless steel in high temperature water

Journal Article:

Abstract

Anodic polarization curves for a solution-treated or sensitized SUS 304 stainless steel and solution-treated Fe-Ni-Cr ternary alloys containing 10%Ni and 6 to 14%Cr have been measured in deaerated 0.5 mol/l Na/sub 2/SO/sub 4/ solutions of pH 2.0 to 5.9 at 298, 523 and 553 K. Corrosion potentials for U-bend SCC test specimens of sensitized SUS 304 stainless steel have also been monitored for a long time in the same solutions as those used for the polarization measurements except that they were aerated. It was found that the differences in the current densities in the passive state, i sub(pass), between the solution treated steel and the sensitized one and also between the ternary alloy with higher Cr content and the one with lower Cr content become large with increasing temperature and decreasing pH. This means that the difference in the values of i sub(pass) between grain bodies and Cr-depleted zones along grain boundaries of sensitized steel becomes larger and susceptibility to intergranular corrosion of the sensitized steel in the passivation region becomes higher with increasing temperature and decreasing pH. Since corrosion potentials for the U-bend SCC test specimens in air-satulated solutions lie in the passive region of anodic polarization curves for  More>>
Authors:
Kushiya, K; [1]  Sugimoto, K; Ejima, T
  1. Tohoku Univ., Sendai (Japan)
Publication Date:
Nov 01, 1978
Product Type:
Journal Article
Reference Number:
AIX-10-472560; EDB-79-124330
Resource Relation:
Journal Name: J. Jpn. Inst. Met.; (Japan); Journal Volume: 42:11
Subject:
36 MATERIALS SCIENCE; STAINLESS STEEL-304; ELECTROCHEMICAL CORROSION; POLARIZATION; AQUEOUS SOLUTIONS; ELECTRIC CURRENTS; ELECTRIC POTENTIAL; HIGH TEMPERATURE; PH VALUE; SODIUM SULFATES; TEMPERATURE DEPENDENCE; ALKALI METAL COMPOUNDS; ALLOYS; CHEMICAL REACTIONS; CHROMIUM ALLOYS; CHROMIUM STEELS; CHROMIUM-NICKEL STEELS; CORROSION; CORROSION RESISTANT ALLOYS; CURRENTS; DISPERSIONS; HEAT RESISTANT MATERIALS; HEAT RESISTING ALLOYS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; MIXTURES; NICKEL ALLOYS; OXYGEN COMPOUNDS; SODIUM COMPOUNDS; SOLUTIONS; STAINLESS STEELS; STEELS; SULFATES; SULFUR COMPOUNDS; 360105* - Metals & Alloys- Corrosion & Erosion
OSTI ID:
5975997
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: CODEN: NIKGA
Submitting Site:
INIS
Size:
Pages: 1109-1114
Announcement Date:

Journal Article:

Citation Formats

Kushiya, K, Sugimoto, K, and Ejima, T. Electrochemical polarization behavior of sensitized SUS 304 stainless steel in high temperature water. Japan: N. p., 1978. Web.
Kushiya, K, Sugimoto, K, & Ejima, T. Electrochemical polarization behavior of sensitized SUS 304 stainless steel in high temperature water. Japan.
Kushiya, K, Sugimoto, K, and Ejima, T. 1978. "Electrochemical polarization behavior of sensitized SUS 304 stainless steel in high temperature water." Japan.
@misc{etde_5975997,
title = {Electrochemical polarization behavior of sensitized SUS 304 stainless steel in high temperature water}
author = {Kushiya, K, Sugimoto, K, and Ejima, T}
abstractNote = {Anodic polarization curves for a solution-treated or sensitized SUS 304 stainless steel and solution-treated Fe-Ni-Cr ternary alloys containing 10%Ni and 6 to 14%Cr have been measured in deaerated 0.5 mol/l Na/sub 2/SO/sub 4/ solutions of pH 2.0 to 5.9 at 298, 523 and 553 K. Corrosion potentials for U-bend SCC test specimens of sensitized SUS 304 stainless steel have also been monitored for a long time in the same solutions as those used for the polarization measurements except that they were aerated. It was found that the differences in the current densities in the passive state, i sub(pass), between the solution treated steel and the sensitized one and also between the ternary alloy with higher Cr content and the one with lower Cr content become large with increasing temperature and decreasing pH. This means that the difference in the values of i sub(pass) between grain bodies and Cr-depleted zones along grain boundaries of sensitized steel becomes larger and susceptibility to intergranular corrosion of the sensitized steel in the passivation region becomes higher with increasing temperature and decreasing pH. Since corrosion potentials for the U-bend SCC test specimens in air-satulated solutions lie in the passive region of anodic polarization curves for the sensitized steel in deaerated solutions, the intergranular stress-corrosion cracking of the sensitized steel in high temperature water with dissolved oxygen is considered to be caused by the preferential corrosion in the Cr-depleted zone.}
journal = {J. Jpn. Inst. Met.; (Japan)}
volume = {42:11}
journal type = {AC}
place = {Japan}
year = {1978}
month = {Nov}
}