| CHARACTERISTICS OF THE OXYGEN REDUCTIONIN ATMOSPHERIC CORROSION |
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| 作者姓名： | 王佳 侯保荣 |
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| 作者单位： | Institute of Oceanology. Chinese Academy of Sciences，Qingdao 266071 |
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| 摘 要： | ImODUcrlONArnaorandnowincreasinglyimPoftantprobleminthemanyyearsinvestigationsofabosphericcormsionofmetaIsandalloyisthatthecormsionrmctionunderathineleCtrolytelayerchangessigwhcanhywithdrying.Tornashov(l966)reportedthatthecorm-sionrateisinfluentalbytheelamlytelayerthwhnessandiscontrolledbythedtheion-lndtingcurrentofoxygenreduCtionreig.l)whentheel~lytefilmisthickerthanthediffUSionlayerthickness.ThereforetherateisnotaffededbytheelCCtrolyteFilmthwh-nessforthecaseofaverythickFilm,e.g.regionI…
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| 收稿时间： | 5 January 1996 |
| 修稿时间： | 16 April 1996 |
Characteristics of the oxygen reduction in atmospheric corrosion |
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| Wang Jia,Hou Bao-rong.CHARACTERISTICS OF THE OXYGEN REDUCTIONIN ATMOSPHERIC CORROSION[J].Chinese Journal of Oceanology and Limnology,1997,15(1):36-41. |
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| Authors: | Wang Jia Hou Bao-rong |
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| Institution: | (1) Institute of Oceanology, Chinese Academy of Sciences, 266071 Qingdao |
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| Abstract: | In this work on marine atmospheric corrosion the changes in oxygen reduction rate with decrease of electrolyte film thickness
during drying was studied by Kelvin probe reference electrode technique and impedance measurements based on previous results.
For >50μm electrolyte film thickness, the oxygen diffusion in liquid controlled the oxygen reduction process. As the cathodic
limiting currents increased to about 1mA/cm2 with evaporation, the rate of oxygen transportation at the gas/liquid boundary limited the current increase. If the thickness
decreased to less than 10μm, the very heterogeneous current distribution caused a sharp decrease in the total cathodic current
due to the effect of the electrolyte film's increased solution resistance. The calculated result on the basis of the assumption
showed good agreement with the experimental findings.
Contribution No. 2932 from the Institute of Oceanology, Chinese Academy of Sciences. State Education Commission supported
project. |
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| Keywords: | Oxygen reduction rate marine atmospheric corrosion oxygen transportation current distribution |
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