Electroplating of thin films of bismuth onto type 4340 steel and alloy 718 to prevent hydrogen embrittlement

Journal Article · Thu Jun 01 00:00:00 EDT 1995 · Corrosion

DOI:https://doi.org/10.5006/1.3293608· OSTI ID:72870

Popov, B N; Zheng, G; White, R E ^[1]

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1. Univ. of South Carolina, Columbia, SC (United States). Dept. of Chemical Engineering

Polarization and permeation experiments showed that a thin layer of electroplated bismuth (1 {mu}m to 2 {mu}m) inhibited the evolution and penetration of hydrogen through nickel-chromium alloy 718 (UNS N07718) and type 4340 (UNS G43400) steel. Inhibition effects were due to the kinetic limitations of the hydrogen discharge reaction and to the suppression of hydrogen adsorption on the deposited layers. The hydrogen evolution reactions on alloy 718 and type 4340 steel were inhibited by 28% and 85%, respectively. The hydrogen permeation rates through these alloys were reduced by 76% and 65%, respectively.

• Sponsoring Organization: USDOE
• OSTI ID: 72870
• Journal Information: Corrosion, Vol. 51, Issue 6; Other Information: PBD: Jun 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH
ELECTROPLATING
CORROSION RESISTANCE
INCONEL 718
ELECTRODEPOSITED COATINGS
CORROSION PROTECTION
STEELS
HYDROGEN EMBRITTLEMENT
MITIGATION
PERMEABILITY
PERFORMANCE
VOLTAMETRY
POLARIZATION