Activating and inhibiting action of anions on hydrogen embrittlement during stress corrosion cracking of high-strength steels

Journal Article · Thu May 01 04:00:00 EDT 1986 · Prot. Met. (Engl. Transl.); (United States)

OSTI ID:5660950

Marichev, V A

This paper investigates hydrogen embrittlement during stress corrosion cracking of four high-strength steels (02N18K9M5T, 33Kh3SNMVFA, 38N4MFA, and 90Kh3M3V6F2) in electrolytes of different anionic compositions. The authors show that a number of anions which are passivators in uniform attack (phosphate, borate, and oxalate) increase the hydrogen permeability of the passivating film on the metal at the crack tip and promote hydrogen embrittlement. The nitrate ion inhibits hydrogen embrittlement, while the hydroxyl ion can be either an activator or an inhibitor of hydrogen embrittlement according to the composition of the steel. Competing absorption is discussed and the ratios of the adsorption coefficients for several pairs of anions are calculated.

• Research Organization: Institute of Physical Chemistry, Academy of Sciences of the USSR
• OSTI ID: 5660950
• Journal Information: Prot. Met. (Engl. Transl.); (United States), Journal Name: Prot. Met. (Engl. Transl.); (United States) Vol. 21:5; ISSN PTNMA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360105* -- Metals & Alloys-- Corrosion & Erosion
ALKALI METAL COMPOUNDS
ALLOYS
ANIONS
BORATES
BORON COMPOUNDS
CHARGED PARTICLES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CORROSION
CORROSION FATIGUE
CORROSION INHIBITORS
CORROSION RESISTANCE
CORROSIVE EFFECTS
CRACK PROPAGATION
DESTRUCTIVE TESTING
EMBRITTLEMENT
FATIGUE
FRACTURE PROPERTIES
HYDROGEN COMPOUNDS
HYDROGEN EMBRITTLEMENT
HYDROXIDES
IONS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
MECHANICAL PROPERTIES
OXYGEN COMPOUNDS
PASSIVATION
PERMEABILITY
PHOSPHATES
PHOSPHORUS COMPOUNDS
QUANTITY RATIO
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SODIUM PHOSPHATES
STEELS
STRESS CORROSION
TESTING