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   Effects of immersion time and 5-Phenyl-1H-tetrazole on the corrosion and corrosion mitigation of cobalt free maraging steel in 0.5 M sulfuric acid pickling solutions  
   
نویسنده sherif e.-s.m. ,seikh a.h.
منبع journal of chemistry - 2013 - دوره : 2013 - شماره : 0
چکیده    The effect of exposure time and 5-phenyl-1h-tetrazole on the corrosion and corrosion mitigation of cobalt free maraging steel in 0.5 m h2so 4 pickling solutions has been reported using electrochemical and spectroscopic investigations. potentiodynamic polarization data showed that the increase of immersion time from 0 min to 120 min increases the corrosion rate and decreases the polarization resistance of the maraging steel. on the other hand,the addition of phta and the increase of its concentration decrease all the corrosion parameters of the steel at all exposure test periods. electrochemical impedance spectroscopy measurements agreed with the obtained polarization data. scanning electron spectroscopy and energy dispersive x-ray investigations confirmed that the inhibition of the steel corrosion is achieved via the adsorption of the phta molecules onto the steel precluding its surface from being dissolved. © 2013 el-sayed m. sherif and asiful h. seikh.
آدرس college of engineering,king saud university,p.o. box 800,riyadh 11421,saudi arabia,electrochemistry and corrosion laboratory,department of physical chemistry,national research centre (nrc),dokki, Egypt, college of engineering,king saud university,p.o. box 800, Saudi Arabia
 
     
   
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