Corrosion behavior of welded joints in ozonated acidic solution

Authors

  • Галина Олеговна Татарченко Technological Institute of the East-Ukrainian National University names of Vladimir Dal (Severodonetsk). Soviet Avenue - 59A, Severodonetsk, Lugansk region, Ukraine, 93400, Ukraine https://orcid.org/0000-0001-8219-6745

DOI:

https://doi.org/10.15587/1729-4061.2014.20164

Keywords:

ozone, corrosion, welded joint, steel, acid, cathodic loop, reactor, synthesis

Abstract

The corrosion-electrochemical behavior of welded joints of steels and alloys, used as instrumental for organic synthesis processes in the presence of ozone was investigated. It was determined that welded joints in ozonated media are characterized by the increase in anodic current densities in the whole range of potentials and the shift of Еcor more negatively compared with the base metal that is associated with the decrease in active centers, on which ozone can be reduced.

In ozone synthesis conditions, the alloy 06ХН28НДТ can be recommended as a structural material for reactors manufacture. In the ozone oxidation processes, it is necessary to pay attention to welded joints, especially for stainless steels such as "18-10" as wide "cathodic loop" formation on polarization curves indicates their tendency to intergranular corrosion (IGC). Corrosion can also proceed in dangerous areas of pitting formation and repassivation of steels under the ozone action. Welded joints of ferritic stainless steels 08Х17Т show the tendency to IGC in periodical ozone syntheses that precludes the possibility of using welding sets or requires protection of joint.

Author Biography

Галина Олеговна Татарченко, Technological Institute of the East-Ukrainian National University names of Vladimir Dal (Severodonetsk). Soviet Avenue - 59A, Severodonetsk, Lugansk region, Ukraine, 93400

Ph.D., Associate Professor

Department of "Higher and Applied Mathematics"

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Published

2014-02-07

How to Cite

Татарченко, Г. О. (2014). Corrosion behavior of welded joints in ozonated acidic solution. Eastern-European Journal of Enterprise Technologies, 1(5(67), 45–48. https://doi.org/10.15587/1729-4061.2014.20164

Issue

Vol. 1 No. 5(67) (2014): Applied physics

Section

Applied physics

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Copyright (c) 2014 Галина Олеговна Татарченко

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