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   Is Molybdic Acid A Suitable Additive To Prevent Corrosion of Stainless Steel in Corrosive Environment? Experimental and Theoretical Investigations.  
   
DOR 20.1001.2.0021079099.1400.8.1.17.7
نویسنده Rahimi Kashani F.
منبع كنگره بين المللي رنگ و پوشش - 1400 - دوره : 8 - کنگره بین المللی رنگ و پوشش - کد همایش: 00210-79099 - صفحه:1 -1
چکیده    Different concentrations of molybdic acid were added to the sulfuric acid solution to prevent general and localized corrosion of aisi 304 ss in h2so4 solution using potentiodynamic polarization, electrochemical impedance spectroscopy (eis), electrochemical noise measurements (en), and molecular simulations such as monte carlo (mc) and molecular dynamics (md) modeling. the results of potentiodynamic polarization manifest that corrosion rate and critical current density, which represent the passive layer formation rate, were decreased. charge transfer resistance attained from eis measurements increased from 5.37 kω.cm2 to 39.7 kω.cm2. reduction of anodic dissolution rate and hydrogen evolution reaction reflects the mixed type inhibitory behavior. electrochemical noise measurement results revealed that increasing inhibitor concentration can prevent pitting corrosion by increasing noise impedance. computations accompanying md and mc simulations represent spontaneous adsorption to the aisi 304 ss surface (adsorption energy equal to -35.4 and -98.3 kcal mol-1, respectively). this work can promote and enlighten how to investigate the localized corrosion and theoretical simulations of inhibitors in corrosive solutions.
کلیدواژه Inhibitor ,Molybdic Acid ,Electrochemical Impedance Spectroscopy ,Electrochemical Noise Measurements ,Md And Mc Simulations
آدرس Amirkabir University Of Technology, Department Of Materials And Metallurgical Engineering, Iran, Amirkabir University Of Technology, Iran
 
   Is molybdic acid a suitable additive to prevent corrosion of stainless steel in corrosive environment? Experimental and theoretical investigations.  
   
Authors Rahimi Kashani F.
Abstract    Different concentrations of molybdic acid were added to the sulfuric acid solution to prevent general and localized corrosion of AISI 304 SS in H2SO4 solution using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), electrochemical noise measurements (EN), and molecular simulations such as Monte Carlo (MC) and molecular dynamics (MD) modeling. The results of potentiodynamic polarization manifest that corrosion rate and critical current density, which represent the passive layer formation rate, were decreased. Charge transfer resistance attained from EIS measurements increased from 5.37 kΩ.cm2 to 39.7 kΩ.cm2. Reduction of anodic dissolution rate and hydrogen evolution reaction reflects the mixed type inhibitory behavior. Electrochemical noise measurement results revealed that increasing inhibitor concentration can prevent pitting corrosion by increasing noise Impedance. Computations accompanying MD and MC simulations represent spontaneous adsorption to the AISI 304 SS surface (adsorption energy equal to -35.4 and -98.3 kcal mol-1, respectively). This work can promote and enlighten how to investigate the localized corrosion and theoretical simulations of inhibitors in corrosive solutions.
Keywords Inhibitor ,Molybdic acid ,Electrochemical impedance spectroscopy ,Electrochemical noise measurements ,MD and MC simulations
 
 

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