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Title: Localized corrosion resistance of corrosion-resistant Ni based alloys in hot concentrated seawater

Abstract

Localized corrosion resistance of stainless steel (Type 316L), a titanium-based alloy (Ti-0.15Pd) and corrosion-resistant nickel-based alloys (a new alloy MAT-21 (Alloy T) and Alloy C-276) was evaluated in four simulated seawater solutions containing 1.8 to 22.0 wt% of chloride ions concentrated by evaporation. Stress corrosion cracking was observed on the 316L stainless steel but not on Alloy T and Alloy C-276 in the solutions. Pitting attack occurred on the surface of the 316L stainless steel base metal in all the solutions. Alloy C-276 suffered pitting attack on the surface including the welded section only in the solutions containing 18.9 and 22.0 wt% of chloride ions, respectively. No pitting attack occurred over any part of the surface including the welded section of Alloy T in any of the solutions. No crevice corrosion was observed in an immersion test of Alloy T and the Ti-0.15 5Pd alloy using test pieces with crevices although crevice corrosion was seen the creviced test pieces of Alloy C-276 and the 316L stainless steel. It was found that both Alloy T and the Ti-0.15Pd alloy, which exhibit high repassivation potentials for crevice corrosion (E{sub r,CREV})corresponding to crevice corrosion potentials, have excellent crevice corrosion resistance, while these alloysmore » which exhibit corrosion potentials greater than E{sub r,CREV}in a solution with a high chloride ion concentration and a high dissolved oxygen concentration in open air may be corroding in the crevices.« less

Authors:
;  [1]
  1. Mitsubishi Materials Corp., Omiya, Saitama (Japan). Central Research Inst.
Publication Date:
OSTI Identifier:
351822
Report Number(s):
CONF-980316-
TRN: IM9927%%347
Resource Type:
Conference
Resource Relation:
Conference: Corrosion `98, San Diego, CA (United States), 22-27 Mar 1998; Other Information: PBD: 1998; Related Information: Is Part Of Corrosion `98: 53. annual conference and exposition, proceedings; PB: [6600] p.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; STAINLESS STEEL-316L; TITANIUM BASE ALLOYS; NICKEL BASE ALLOYS; SEAWATER; STRESS CORROSION; CRACK PROPAGATION; PITTING CORROSION; CREVICE CORROSION; CORROSION RESISTANCE; CORROSIVE EFFECTS

Citation Formats

Sugahara, Katsuo, and Takizawa, Yoshio. Localized corrosion resistance of corrosion-resistant Ni based alloys in hot concentrated seawater. United States: N. p., 1998. Web.
Sugahara, Katsuo, & Takizawa, Yoshio. Localized corrosion resistance of corrosion-resistant Ni based alloys in hot concentrated seawater. United States.
Sugahara, Katsuo, and Takizawa, Yoshio. 1998. "Localized corrosion resistance of corrosion-resistant Ni based alloys in hot concentrated seawater". United States.
@article{osti_351822,
title = {Localized corrosion resistance of corrosion-resistant Ni based alloys in hot concentrated seawater},
author = {Sugahara, Katsuo and Takizawa, Yoshio},
abstractNote = {Localized corrosion resistance of stainless steel (Type 316L), a titanium-based alloy (Ti-0.15Pd) and corrosion-resistant nickel-based alloys (a new alloy MAT-21 (Alloy T) and Alloy C-276) was evaluated in four simulated seawater solutions containing 1.8 to 22.0 wt% of chloride ions concentrated by evaporation. Stress corrosion cracking was observed on the 316L stainless steel but not on Alloy T and Alloy C-276 in the solutions. Pitting attack occurred on the surface of the 316L stainless steel base metal in all the solutions. Alloy C-276 suffered pitting attack on the surface including the welded section only in the solutions containing 18.9 and 22.0 wt% of chloride ions, respectively. No pitting attack occurred over any part of the surface including the welded section of Alloy T in any of the solutions. No crevice corrosion was observed in an immersion test of Alloy T and the Ti-0.15 5Pd alloy using test pieces with crevices although crevice corrosion was seen the creviced test pieces of Alloy C-276 and the 316L stainless steel. It was found that both Alloy T and the Ti-0.15Pd alloy, which exhibit high repassivation potentials for crevice corrosion (E{sub r,CREV})corresponding to crevice corrosion potentials, have excellent crevice corrosion resistance, while these alloys which exhibit corrosion potentials greater than E{sub r,CREV}in a solution with a high chloride ion concentration and a high dissolved oxygen concentration in open air may be corroding in the crevices.},
doi = {},
url = {https://www.osti.gov/biblio/351822}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 31 00:00:00 EST 1998},
month = {Thu Dec 31 00:00:00 EST 1998}
}

Conference:
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