Surface modification effects on hydrogen permeation in high-temperature, high-pressure, hydrogen-hydrogen sulfide environments

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · Corrosion (Houston); (United States)

DOI:https://doi.org/10.5006/1.3294353· OSTI ID:7040209

Fukai, T; Matsumoto, K ^[1]

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1. Mitsui SRC Development Co. Ltd., Chiba (Japan). Technical Development Div.

Surface modifications on chromium-molybdenum (Cr-Mo) steel were tested for hydrogen (H) permeation and corrosion protection in a hydrogen-hydrogen sulfide (H[sub 2]-H[sub 2]S) environment. Virgin thermal spray coating showed no resistance to H permeation. Virgin metal coating, aluminum (Al) hot-dipped plating, Al diffusion coating, and Cr diffusion coating worked as barriers to H permeation, apparently by means of a superficial oxide or passivation film. Virgin ceramic coating by chemical vapor deposition (CVD) also worked as a barrier to H permeation. After testing of specimens as coated, coating materials were sulfidized to simulate the surface after use in a corrosive environment containing H[sub 2]S and then were tested for H permeation. Thermal spray coatings with a layer of aluminum oxide (Al[sub 2]O[sub 3])-50% nickel (Ni)-50% Cr acquired resistance to H permeation after sulfidization. Resistance to H permeation of metal coatings such as the Al hot-dipped plating, Al diffusion coating, and Cr diffusion coating decreased after sulfidization, but remained at a satisfactory level. Ceramic coatings by CVD lost resistance to H permeation with increasing times of sulfidization. Thermal spray and metal coatings retained corrosion resistance against sulfidization. The corrosion resistance of ceramic coatings by CVD gradually deteriorated with time of sulfidization. Of the surface modifications studied, thermal spray coatings were considered feasible for practical applications.

• OSTI ID: 7040209
• Journal Information: Corrosion (Houston); (United States), Journal Name: Corrosion (Houston); (United States) Vol. 50:7; ISSN 0010-9312; ISSN CORRAK
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360104 -- Metals & Alloys-- Physical Properties
360105* -- Metals & Alloys-- Corrosion & Erosion
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALLOYS
ALUMINIUM
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CERAMICS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
COATINGS
CORROSION PROTECTION
DIFFUSION COATINGS
DIPPED COATINGS
ELEMENTS
EMBRITTLEMENT
HIGH ALLOY STEELS
HYDROGEN COMPOUNDS
HYDROGEN EMBRITTLEMENT
HYDROGEN SULFIDES
IRON ALLOYS
IRON BASE ALLOYS
METALS
MOLYBDENUM ALLOYS
NICKEL
OXIDES
OXYGEN COMPOUNDS
PERMEABILITY
PROTECTIVE COATINGS
SPRAYED COATINGS
STAINLESS STEELS
STEELS
SULFIDATION
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENTS
VAPOR DEPOSITED COATINGS