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Journal of Materials Science

, Volume 34, Issue 4, pp 859–868 | Cite as

Pitting corrosion inhibition of 316 stainless steel in phosphoric acid-chloride solutions Part II AES investigation

  • H. A. El Dahan
Article

Abstract

The application of Auger Electron Spectroscopy (AES) to the study of the composition and thickness of the passive film formed on the surface of 316 Stainless steel in H3PO4-Cl− solutions containing nitrate, dichromate, molybdate and tungstate as inhibitors is discussed. Data are presented which explain the effectiveness of the additives on the properties of the passive films of the alloy. It is concluded that much higher corrosion resistance of the alloy is observed in nitrate additives due to marked nitrogen enrichment underneath the passive film which enhances the repassivation ability of this alloy. The results could also explain the effectiveness of the dichromate, molybdate and tungstate anions due to improved film repair conditions.

Keywords

Stainless Steel Corrosion Resistance Molybdate Passive Film Dichromate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • H. A. El Dahan
    • 1
  1. 1.Electrochemistry and Corrosion Laboratory,National Research Centre,Dokki, Cairo,Egypt

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