Document Details

Document Type : Project 
Document Title :
Study of Crevice Corrosion on Selected Steel Alloys used in feed-water Piping
دراسة التآكل ألصدعي لبعض سبائك الصلب المستخدمة في أنابيب تغذية المياه
 
Subject : Materials Engineering 
Document Language : Arabic 
Abstract : This project deals with investigating crevice corrosion type of localized corrosion for some selected steel alloys. For this purpose a crevice cell with an artificial crevice setup was developed. The artificial crevice consisted of Plexiglas attached to the steel surface by means of screws. This creates metal/non-metal type crevice cell. In the investigations electrochemical techniques was used to study the electrochemical behavior of the steel alloys. For this purpose potentiodynamic and potentiostatic techniques were used through Potentiostate/ Software System. Based on the results it was demonstrated the close link between the electrochemical behavior and the crevice corrosion process occurring inside the crevice. The study revealed that for steel alloys in sodium chloride solution and for crevice corrosion to occur it is required to have acidification. The acidification works on lowering the pH inside the crevice and causing the attack to occur. This was explained in light of the IR drop theory where time is required to reach the critical condition for acidification to cause corrosion. Based on the study the carbon steel took very little time and no applied potential was needed, while stainless steel required more time and applying potential in the anodic part of the polarization curve. As for the location of the attack, it is postulated that the attacked areas were impurities or second phase in the matrix of the alloy. 
Publishing Year : 1425 AH
2005 AD 
Sponsor Name : kau 
Sponsorship Year : 1425 AH
2005 AD 
Added Date : Friday, October 23, 2009 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
محمد إسماعيل عبدالسلامabdulsalam, mohammed IsmailInvestigatorDoctorate 

Files

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 23335.doc doc 

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