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Radioisotopes in the physical chemistry of corrosion processes and their inhibition; Les radioisotopes dans la chimie physique des processus de corrosion et de leur inhibition; Primenenie radioizotopov v fizicheskoj khimii protsessov korrozii i ikh tormozheniya; Los radioisotopos en la quimica fisica de los procesos de corrosion y de inhibicion

Conference:

Abstract

The fundamental study of the electrochemical processes of corrosion and inhibition involves various factors, including in particular: (a) adsorption phenomena of different types; (b) ion-exchange properties of passive films; and (c) the electrochemical kinetics of both anodic and cathodic processes across the interface between a metal and its corrosive environment. The availability of radioisotopes has made possible certain studies of these phenomena that could not be made previously with conventional techniques. The element technetium, a homologue of manganese in the periodic system, has been found uniquely suited to certain of these studies by reason of its nuclear properties. The chemical properties of technetium compounds are summarized and contrasted with those of corresponding Cr{sup 51} compounds and those of molybdenum and tungsten, so much used in studies of inhibition. Selected experimental studies are given as examples of the uses to which technetium has already been put in this type of work. Among these are empirical studies of its action as a very efficient inhibitor of the corrosion of iron, together with the results of long-term observations of surface activity. Other studies with both Tc{sup 99} and I{sup 131} have demonstrated the significance of competitive adsorption of ions in the determination of  More>>
Authors:
Cartledge, G H [1] 
  1. Chemistry Division, Oak Ridge National Laboratory, Oak Ridge, TN (United States)
Publication Date:
Mar 15, 1962
Product Type:
Conference
Resource Relation:
Conference: Conference on the Use of Radioisotopes in the Physical Sciences and Industry, Copenhagen (Denmark), 6-17 Sep 1960; Other Information: 1 fig, 20 refs; Related Information: In: Radioisotopes in the Physical Sciences and Industry. Proceedings of the Conference on the Use of Radioisotopes in the Physical Sciences and Industry. V. III| 652 p.
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 07 ISOTOPES AND RADIATION SOURCES; ADSORPTION; CHEMICAL PROPERTIES; CHROMIUM 51; CORROSION; ELECTROCHEMISTRY; FILMS; INHIBITION; INTERFACES; IODINE 131; KINETICS; MANGANESE; MOLYBDENUM; NUCLEAR PROPERTIES; OXYGEN; PHYSICAL CHEMISTRY; SURFACES; TECHNETIUM; TECHNETIUM 99; TUNGSTEN
OSTI ID:
22025753
Research Organizations:
International Atomic Energy Agency, Vienna (Austria); United Nations Educational, Scientific and Cultural Organization, Paris (France)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA12N1769113046
Submitting Site:
INIS
Size:
page(s) 549-557
Announcement Date:
Jan 16, 2013

Conference:

Citation Formats

Cartledge, G H. Radioisotopes in the physical chemistry of corrosion processes and their inhibition; Les radioisotopes dans la chimie physique des processus de corrosion et de leur inhibition; Primenenie radioizotopov v fizicheskoj khimii protsessov korrozii i ikh tormozheniya; Los radioisotopos en la quimica fisica de los procesos de corrosion y de inhibicion. IAEA: N. p., 1962. Web.
Cartledge, G H. Radioisotopes in the physical chemistry of corrosion processes and their inhibition; Les radioisotopes dans la chimie physique des processus de corrosion et de leur inhibition; Primenenie radioizotopov v fizicheskoj khimii protsessov korrozii i ikh tormozheniya; Los radioisotopos en la quimica fisica de los procesos de corrosion y de inhibicion. IAEA.
Cartledge, G H. 1962. "Radioisotopes in the physical chemistry of corrosion processes and their inhibition; Les radioisotopes dans la chimie physique des processus de corrosion et de leur inhibition; Primenenie radioizotopov v fizicheskoj khimii protsessov korrozii i ikh tormozheniya; Los radioisotopos en la quimica fisica de los procesos de corrosion y de inhibicion." IAEA.
@misc{etde_22025753,
title = {Radioisotopes in the physical chemistry of corrosion processes and their inhibition; Les radioisotopes dans la chimie physique des processus de corrosion et de leur inhibition; Primenenie radioizotopov v fizicheskoj khimii protsessov korrozii i ikh tormozheniya; Los radioisotopos en la quimica fisica de los procesos de corrosion y de inhibicion}
author = {Cartledge, G H}
abstractNote = {The fundamental study of the electrochemical processes of corrosion and inhibition involves various factors, including in particular: (a) adsorption phenomena of different types; (b) ion-exchange properties of passive films; and (c) the electrochemical kinetics of both anodic and cathodic processes across the interface between a metal and its corrosive environment. The availability of radioisotopes has made possible certain studies of these phenomena that could not be made previously with conventional techniques. The element technetium, a homologue of manganese in the periodic system, has been found uniquely suited to certain of these studies by reason of its nuclear properties. The chemical properties of technetium compounds are summarized and contrasted with those of corresponding Cr{sup 51} compounds and those of molybdenum and tungsten, so much used in studies of inhibition. Selected experimental studies are given as examples of the uses to which technetium has already been put in this type of work. Among these are empirical studies of its action as a very efficient inhibitor of the corrosion of iron, together with the results of long-term observations of surface activity. Other studies with both Tc{sup 99} and I{sup 131} have demonstrated the significance of competitive adsorption of ions in the determination of the kinetics of the corrosion and inhibitory processes. Finally, the author shows how the unique properties of technetium have permitted a clear discrimination between the relative contributions of oxygen and the oxidizing inhibitor in the maintenance of passivity. (author) [French] Parmi les facteurs qui entrent en jeu dans l'etude fondamentale des processus electrochimiques de corrosion et d'inhibition on releve notamment: a) differents types de phenomenes d'adsorption; b) les proprietes d'echange ioniques des films passifs; c) la cinetique electrochimique des processus tant anodiques que cathodiques qui se produisent dans l'interface entre un metal et le milieu corrosif. Avec les radioisotopes, on peut maintenant entreprendre sur ce sujet certaines recherches impossibles avec les moyens classiques. Le technetium, homologue du manganese dans la classification periodique, s'est revele l'element de choix pour certaines de ces recherches. Ses proprietes nucleaires sont extremement interessantes a cet egard. Le memoire resume les proprietes chimiques des composes du technetium, qu'il oppose a celles des composes correspondants du chrome-51, ainsi qu'a celles du molybdene et du tungstene, d'usage repande dans les recherches sur l'inhibition. L'auteur decrit ensuite quelques etudes experimentales a titre d'exemples des emplois que le technetium a deja trouves dans les travaux de ce genre. Il mentionne notamment certains etudes empiriques sur l'action du technetium en tant qu'inhibiteur tres efficace de la corrosion du fer, ainsi que les resultats d'observations faites pendant une longue periode sur l'activite de surface. D'autres recherches au moyen du technetium-99 et de l'iode-131 ont montre l'importance de l'adsorption competitive d'ions dans l'etude cinetique des processus de corrosion et d'inhibition. Enfin l'auteur mentre comment les proprietes speciales du technetium ont permis de faire une distinction nette entre la part de l'oxygene et celle de l'inhibiteur oxydant dans le maintien de la passivite. (author) [Spanish] Algunos de los factores que intervienen, en los estudios fundamentales de los procesos electroquimicos de corrosion e inhibicion son los siguientes: a) fenomenos de adsorcion de diversos tipos, b) propiedades de intercambio ionico de las peliculas pasivas, y c) la cinetica electroquimica de los procesos anodicos y catodicos que tienen lugar en la fase que separa un metal del medio corrosivo. Los radioisotopos han hecho posible ciertos estudios de estos fenomenos que antes no podian llevarse a cabo con los metodos clasicos. Se ha comprobado que el tecnecio, tm homologo dol manganeso en el sistema periodico, es particularmente adecuado para algunos de estos estudios. Las ventajas do este elemento estriban, en sus propiedades nucleares. La memoria resume las propiedades quimicas de los compuestos de tecnecio y las compara con las de los compuestos correspondientes de {sup 51}Cr, de molibdeno y de wolframio, que con tanta frecuencia se emplean en el estudio de la inhibicion. La memoria describe seguidamente ciertos estudios experimentales como ejemplo de los usos a que se ha destinado el tecnecio en los trabajos de este tipo. Entre ellos menciona estudios empiricos de su accion como eficaz inhibidor de la corrosion del hierro, y observaciones de la actividad de superficie realizadas durante periodos largos de tiempo. Otros estudios efectuados con {sup 99}Tc y con {sup 131}I han demostrado la importancia de la adsorcion competitiva de iones en la determinacion de la cinetica de los procesos de corrosion y de inhibicion. Como tercer ejemplo, describe como las propiedades excepcionales del tecnecio han permitido distinguir claramente las contribuciones relativas del oxigeno de las del inhibidor oxidante en el mantenimiento de la pasividad. (author) [Russian] Sredi faktorov, vkhodyashchikh v fundamental'noe izuchenie ehlektrokhimicheskikh protsessov korrozii i tormozheniya, vydelyayutsya v chastnosti sleduyushchie: a) razlichnye vidy adsorbtsionnykh yavlenij; b) ionoobmennye svojstva passivnykh plenok; c) ehlektrokhimicheskaya kinetika kak anodnykh, tak i katodnykh protsessov, proiskhodyashchikh mezhdu metallom i korrozijnoj sredoj. Teper' pri pomoshchi radioizotopov mozhno provesti nekotorye issledovaniya ehtikh yavlyaenij, kotorye nevozmozhno osushchestvit' obychnymi sredstvami. Tekhnetsij, gomolog margantsa v periodicheskoj sisteme, okazalsya ves'ma podkhodyashchim dlya nekotorykh ehtikh issledovanij. Ego yadernye svojstva krajne interesny u ehtom otnoshenii. V doklade kratko izlagayutsya khimicheskie svojstva soedinenij tekhnetsiya, protivopostavlennye svojstvam sootvetstvuyushchikh soedinenij khroma-51, molibdena i vol'frama, obychno ispol'zuyushchikhsya pri izuchenii protsessov tormozheniya. Dalee avtor opisyvaet nekotorye ehksperimental'nye issledovaniya v kachestve primerov ispol'zovaniya tekhnetsiya v rabotakh podobnogo roda. V chastnosti, on upominaet nekotorye ehmpiricheskie issledovaniya dejstviya tekhnetsiya kak ves'ma ehffektivnogo sredstva tormozheniya korrozii zheleza, a takzhe rezul'taty mnogochislennykh nablyudenij nad aktivnost'yu poverkhnosti. Drugie issledovaniya pri pomoshchi kak tskhnstsiya-99, tak i joda-131 pokazali vazhnost' sravnitel'noj adsorbtsii ionov v kineticheskom izuchenii protsessov korrozii i tormozheniya. Nakonets, avtor pokazyvaet, kak osobye svojstva tekhnetsiya pozvolili provesti chetkoe razgranichenie mezhdu dolej kisloroda i dolej zamedlitelya okisleniya pri sokhranenii passivnosti. (author)}
place = {IAEA}
year = {1962}
month = {Mar}
}