پديد آورنده :
هرندي زاده نجف آبادي ، داوود
عنوان :
بررسي اثر كار سرد بر نرخ خوردگي اتمسفري فولاد ساده كربني
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
مواد گرايش خوردگي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد و متالوژي
صفحه شمار :
هشت ،84،[II]ص: مصور ، جدول ، نمودار
يادداشت :
ص. ع به: فارسي و انگليسي
استاد راهنما :
احمد ساعتچي ، محمود منير واقفي
تاريخ نمايه سازي :
23/01/1388
استاد داور :
ابراهيم حشمت دهكردي ، محمد علي گلعذار
چكيده فارسي :
به فارسي و انگليسي : قابل رويت در نسخه ديجيتال
چكيده انگليسي :
Abstract The economic losses caused by atmospheric corrosion are tremendous Atmosphericcorrosion has been reported to account for more failures in terms of cost and tonnage thanany other type of material degradation processes Mechanisms of atmospheric corrosioninvolved all solid liquid and gas states of materials These mechanisms have been rulednot only by the inherent properties of material but also by the environmental parametersand properties of surface electrolyte Although the economic aspect of this process is agreat encouraging force for research about it the theoretical complexity of atmosphericcorrosion mechanisms cause a lot of it s aspects remain unknown As the first step in thepresent study the influences of some of the most effective environmental parameters havebeen studied by some field tests in Bandar Turkaman and Isfahan atmospheres Thesestudies illustrate that atmospheric corrosivity of Bandar Turkaman can be classified as C4and Isfahan as C2 according to ISO 9223 Then the protection ability of the rust layerswhich formed on ST 37 steel and its variation with exposure time and atmosphericproperties have been studied using XRD SEM EDX and electrochemical techniques Theresults of these evaluations show that protect ability of rust layers which formed in Isfahanis grater than for Bandar Turkaman To estimate the effect of cold work on the first stageof atmospheric corrosion electrochemical tests have been done on bare carbon steelsamples with different percentage of cold work The results show that in the range of zeroto 50 cold work the corrosion rate around 33 of cold work is minimum At last todetermine the effect of cold work on the process of atmospheric corrosion rust layerswhich formed on samples with different percentage of cold work during 6 month exposure have been studied It was observed that the permeability and conductivity of rust layerswhich formed on the sample with 23 cold work is more than other samples whichindicate that this sample will be corroded faster than others after complete formation ofrust layers This finding is in good agreement with the results of weight loss evaluation ofsamples after 6 month of exposure Key words Atmospheric corrosion Cold work Carbon steel
استاد راهنما :
احمد ساعتچي ، محمود منير واقفي
استاد داور :
ابراهيم حشمت دهكردي ، محمد علي گلعذار
