A GALVANOSTATIC POLARIZATION INVESTIGATION OF STEEL CORROSION IN ALKALINE SOLUTIONS
Main Article Content
Abstract
The electrochemical behavior of iron and steel in alkaline media is complex,not well understood.It is
difficult to determine corrosion rates of steel in high pH solutions by extrapolation of Tafel curves.Polarization resistance (Rp) must be determined in some other way.In this study an attempt was made to find (Rp) values of steel corroding in saturated Ca(OH)2 by anodic currents impressed galvanostatically to the steel from a counter electrode placed together with a reference electrode(I.e. impressed anodic current densities were (10,20,40,and 100µA/Cm2 and duration time was about 25 minutes). It was found that this rapid and non destructive polarization technique yields accepted and reasonable information on corrosion behavior.
Article Details
How to Cite
Publication Dates
References
* Stern,M. and Geary,A.L.( 1957),J.electrochem.Soc.,Vol.104,56.
* Stern,M. (1958) , Corrosion Vol.14,329.
* Ibid(1958) Corrosion Vo;.14,440.
* Mansfeild,F.(1976) Advance in corrosion science & technology,Vol.6,p.163-262,plenum press,New York.
* Callow,L.M.,Richardson ,J.A. & Dawson,J.L.(1976) corrosion ,J.,11,132.
* Mansfeild,F. & Oldham , K.B.(1971),corros.sci.11,787.
* Gonzalez,J.A.,Molina,A.,Escudero,M.L. and Andrade,C.(1985),J.corros.sci.,Vol.25,No.10.
* Newton,C.J.& Sykes,J.M.(1988) j.corros.sci.Vol.28,No.11.
* Elesener,B.,Wojtas,H.,Bohni,H.(1994),galvanostatic pulse measurement rapid on site corrosion monitoring"proceeding of international conference held in the Univ. of Sheffield ,24-28 July .
* Gouda,V.K.,(1970) , Br.corros.J.,Vol.5,P.198.
* Abd-El-Haleem, S.M. and Abd-Aal,E.E.(2006) electrochemical behavior of copper in alkaline sulfide solutions,corrosion,Vol.62,NO.2,P.121-128.
* Andrade,C.,Castillo V.,Alonso C., and Gonzalez J.A(1984) The determination of corrosion rate of steel embedded in concrete by polarization resistance and AC impedence methods,American society for testing and materials Philadelphia,P.43-63.
* Moosavi A.N.,John G.,and Gedge J. (1994) assessment of corrosion of refrigerant tubes in reinforced concrete eyes ring using corrosion mapping,Sheffield academic press,Sheffield ,Vol.1,p.116-127