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Titolo:
The role of hydrogen in microbiologically influenced corrosion and stress corrosion cracking
Autore:
Biezma, MV;
Indirizzi:
Univ Cantabria, Div Sci Mat, Santander 39004, Spain Univ Cantabria Santander Spain 39004 Div Sci Mat, Santander 39004, Spain
Titolo Testata:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
fascicolo: 5, volume: 26, anno: 2001,
pagine: 515 - 520
SICI:
0360-3199(200105)26:5<515:TROHIM>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
SULFATE-REDUCING BACTERIA; MILD-STEEL; FAILURE;
Keywords:
microbiologically influenced corrosion (MIC); stress corrosion cracking (SCC); hydrogen embrittlement;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Biezma, MV Univ Cantabria, Div Sci Mat, Santander 39004, Spain Univ Cantabria Santander Spain 39004 , Santander 39004, Spain
Citazione:
M.V. Biezma, "The role of hydrogen in microbiologically influenced corrosion and stress corrosion cracking", INT J HYD E, 26(5), 2001, pp. 515-520

Abstract

The phenomenon known as "microbiologically influenced corrosion" (MIC). isvery closely related to hydrogen embrittlement of different metallic systems, since microorganims are also a source of hydrogen, by decatalyzing the hydrogen recombination reaction at metal surface, H-ads + H-ads --> H-2. Onthe other hand, ''stress corrosion cracking", (SCC), refers to the synergic action of a specific aggresive environment and the stress condition, which lead to the deterioration or loss of the mechanical propel-ties of a metallic material. linked to the presence of hydrogen. This paper summarizes the role of hydrogen in both phenomena, since the environment supports and justifies the corrosion reactions, being able to change the inside crack chemical conditions, related to the bulk solution. In this way. tensile stresses in SCC, and biological activity in MIG, must be responsible for producinga distribution of embrittlement source, generally hydrogen, with a synergic effect between both phenomena. Certain "metallurgical conditions" of the material with different strength levels associated with diverse values of hydrogen solubility and diffusivity are specially susceptible to MIC and SCC. In addition to this, the principal morphologies of attack and cracking are described. (C) 2001 International Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved.

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Documento generato il 05/04/20 alle ore 13:39:17