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Inhibitor Protection of Steels in Solutions of Sulfuric Acid under High-Temperature Corrosion (up to 200°C)

  • Ya. G. AvdeevEmail author
  • D. S. Kuznetsov
  • S. V. Oleinik
CORROSION INHIBITORS
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Abstract

This article analyzes corrosion of 08Kh18N10T chrome nickel steel in 2 M H2SO4 in wide temperature range t = 0–200°C. Under such conditions, corrosion of metal increases with increase in t and at 200°C reaches 9.7 kg/(m2 h). It is demonstrated that the composition of substituted triazole, IFKhAN-92 inhibitor and KI (mole ratio 1 : 1), makes it possible to protect this steel in 2 M H2SO4 at temperatures up to 140°C, inclusive. A three-component mixture of IFKhAN-92, KI, and hexamethylenetetramine (1 : 1 : 4), is more interesting in this regard, it efficiently inhibits corrosion at t up to 180°C, inclusive, maintaining protection for at least 8 h. The same composition reliably protects low carbon steel, grade 20, in 2 M H2SO4 at temperatures up to 180°C, inclusive; moreover, metal corrosion is decelerated in time.

Keywords:

stainless steel high-temperature acid corrosion corrosion inhibitors triazoles 

Notes

ACKNOWLEDGMENTS

This work was supported by the Russian Foundation for Basic Research and the government of Kaluga oblast, project no. 14-43-03037.

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • Ya. G. Avdeev
    • 1
    Email author
  • D. S. Kuznetsov
    • 2
  • S. V. Oleinik
    • 2
  1. 1.Tsiolkovsky State UniversityKalugaRussia
  2. 2.Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of SciencesMoscowRussia

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