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Meritve elektrokemijskega šuma generiranega z napetostno korozijskim pokanjem : spektralna analiza kot pomoč pri razločevanju med korozijskimi procesi in zunanjimi motnjamiBajt Leban, Mirjam ...S pomočjo meritev elektrokemijskega šuma in njegove analize smo sledili procesu napetostno-korozijskega pokanja avsenitnega nerjavnega jekla AISI 304 v koncentrirani raztopini magnezijevega klorida v ... prosto korodirajočem sistemu. Napetostni in tokovni šum, ki skupaj predstavljata elektrokemijski šum, smo merili v sistemu s tremi elektrodami, med katerimi je bila ena skupna in ves čas preiskusa natezno obremenjena. Med potekom preskusa smo površino napete elektrode večkrat vizuelno preiskali in nastale poškodbe nato primerjali z izmerjenimi časovnimi vrstami. Ker je iz samih časovnih vrst težko sklepati o naravi korozijskih procesov smo šum, izmerjen pri različnih pogojih in v različnih obdobjih korozijske aktivnosti s pomočjo hitre Fourierjeve transformacije pretvorili v frekvenčni prostor in ga analizirali. Iz izmerjenih časovnih vrst smo v obdobju, ko je bilo prisotno napetostno koozijsko pokanje, uspeli izločiti istočasno nastopajoče fluktuacije tokovnega in napetostnega šuma, ki bi lahko pomenile nastanek razpok ali druge katodne dogodke, povezane s tem. V našem primeru rezultati spektralne analize niso upravičili trditev raznih raziskovalcev, da je s pomočjo te analize mogoče razlikovati posamezne oblike korozije med seboj. Vendar se je ta analiza izkazala kot zelo dobrodošlo orodje pri prepoznavanju zunanjih motenj in ločitvi inštrumentalnega šuma od tistega, ki ga generirajo elekrokemijski procesi.Source: Zbornik referatov s posvetovanja (Str. 481-485)Type of material - conference contributionPublish date - 1998Language - slovenianCOBISS.SI-ID - 3996694
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Bajt Leban, Mirjam | 16394 |
Doleček, Valter | 00869 |
Legat, Andraž | 08281 |
Kuhar, Viljem | 17353 |
Source: Personal bibliographies
and: SICRIS
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