0872-1904 0872-1904 S0872-19042004000300004 Egypt 00 00 2004 00 00 2004 22 3 205 225

The Effect of Sour Gases and Some Anions on the Corrosion Behavior of Carbon Steel

 

S.A. Salih, A.A. Mazhar, .H. Mahanny*

 

Chemistry Department, Faculty of Sciences, Cairo University, Giza, Egypt.

 

Received 15 January 2003; accepted in revised form 28 July 2004

 

 

Abstract

]]> The effect of the presence of CO2 and H2S in the well water used in the petroleum plant  on corrosion of carbon steel has been tested using impedance measurements. Carbon dioxide leads to decrease in the resistivity of the film developed on the metallic surface, while the effect of hydrogen sulfide is less pronounced. Scanning electron micrographs have shown that corrosion products cover only small part of metallic surface in water containing CO2. Studies under polarization conditions will allow concluding that the dissolved gases in the well water reduce the ability of the film to protect the metal against corrosion. The influence of the oxoanions and halide ions on the corrosion rate of steel has also been analyzed.

 

Keywords: corrosion, sour gases, carbon steel, petroleum plant.

 

 

Texto completo disponível apenas em PDF.

Full text only in PDF format.

 

 

References

]]>

1.      C. De Waard, D.E. Millians, Corrosion 31 (1975) 177.        [ Links ]

2.      K.Videm, A. Dugstad, paper 42, presented at Corrosion /87, NACE, Houston, TX (1987).        [ Links ]

3.      G-Schmitt, paper 43, presented at Corrosion /83, NACE, Houston, TX (1983).        [ Links ]

4.      K. Viden, A. Dugstad, paper 186, presented at Corrosion /88, NACE, Houston, TX (1988).        [ Links ]

5.      S.A. Salih, A.G. Gas-Allah, A.A. Mazhar, R.H. Tammam, J. Appl. Electrochem. 31 (2001) 1103.        [ Links ]

6.      M. Metikos-Hukovic, R. Babic, Z. Grubac, S. Brinic, J. Appl. Electrochem. 24 (1994) 772.        [ Links ]

7.      F. Mansfeld, J. Appl. Electrochem. 25 (1995) 187.        [ Links ]

8.      G.I. Ogundele, W.E. White, Corrosion 42 (1986) 71.        [ Links ]

9.      Z. Quan, S. Chen, X. Cui, Y. Zi, Corrosion 58 (3) (2002) 248.        [ Links ]

10.    Handbook of Chemistry and Physics. David R. Lide, 2nd Edn. 2001-2002, CRC Press, Florida.        [ Links ]

11.    S. Gudic, J. Radosevic, M. Kliskic, J. Appl. Electrochem. 26 (1996) 1027.        [ Links ]

12.    W.N. Garrad, Corros. Sci. 50 (1994) 215.         [ Links ]

13.    I.L. Rozenfield, Corrosion Inhibitors, McGraw - Hill, New York, 1981.        [ Links ]

14.    G.W. Water, Corros. Sci. 26(8) (1986) 681.        [ Links ]

 

* Corresponding author. E-mail address: chemomemo@yahoo.com

]]> 1975 31 177 1987 Houston TX 1983 Houston TX 1988 Houston TX 2001 31 1103 1994 24 772 1995 25 187 1986 42 71 2002 58 3 3 248 2001 -2 00 2 1996 26 1027 1994 50 215 1981 1986 26 8 8 681