Prevention of hydrogen embrittlement of metals in corrosive envi

Details Prevention of hydrogen embrittlement of metals in corrosive envi Prevention of hydrogen embrittlement of metals in corrosive envi

1982-05-21

1984-12-18

Page, Thurman K.

Pipes and tubular conduits

Distinct layers

Coated

4273837, 427386, 4273881, 427409, 427410, 428 36, 106 1444, 106 1445, D03D 4926, B05D 302, F16L 914

Patent

active

044885784

ABSTRACT:
Metal substrates in corrosive environments, such as gas and oil pipelines, are normally prone to embrittlement caused by absorption of the hydrogen atoms cathodically evolved during various corrosion processes. This is substantially prevented by providing an active substance in the vicinity of the metal substrate, and in electrical contact therewith, the active substance being a sulphide or mixed sulphide of a metal of Group Vb, VIb or VIIb of the Periodic Table or of a rare earth metal, especially WS.sub.2 and MoS.sub.2. The active substance is preferably applied as or in a coating on the surface of the substrate, with an overcoating of, for example, a thermosetting resin, preferably being employed for mechanical and environmental protection.

REFERENCES:
patent: 2431997 (1947-12-01), Rose
patent: 3147204 (1964-09-01), Shepard et al.
patent: 3973056 (1976-08-01), Fessler et al.
patent: 4040447 (1977-08-01), Scott
patent: 4268579 (1981-05-01), Suzuki et al.

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