Estimation of Inhibitor Efficiency against Hydrogen Sulfide and Carbonic Acid Corrosion of Carbon Steel by Impedance Spectroscopy Method

2019 ◽  
Vol 6 (24) ◽  
pp. 67-72 ◽  
Author(s):  
Vladimir Vigdorovich ◽  
Liudmila E. Tsygankova ◽  
Svetlana Siniutina ◽  
Vladimir Kichigin
Keyword(s):  
Hydrogen Sulfide ◽  
Carbon Steel ◽  
Impedance Spectroscopy ◽  
Carbonic Acid ◽  
Acid Corrosion ◽  
Spectroscopy Method ◽  
Inhibitor Efficiency

scholarly journals The effect of volatile organic acids and CO2 on the corrosion rate of carbon steel from a Top-of-Line-Corrosion (TLC) perspective

2021 ◽  
Vol 1201 (1) ◽  
pp. 012079
Author(s):  
S B Gjertsen ◽  
A Palencsar ◽  
M Seiersten ◽  
T H Hemmingsen
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Organic Acid ◽  
Carbonic Acid ◽  
Acid Corrosion ◽  
Iron Concentration ◽  
Critical Factor ◽  
Steel Corrosion ◽  
Carbon Steels ◽  
Corrosion Rates

Abstract Models for predicting top-of-line corrosion (TLC) rates on carbon steels are important tools for cost-effectively designing and operating natural gas transportation pipelines. The work presented in this paper is aimed to investigate how the corrosion rates on carbon steel is affected by acids typically present in the transported pipeline fluids. This investigation may contribute to the development of improved models. In a series of experiments, the corrosion rate differences for pure CO2 (carbonic acid) corrosion and pure organic acid corrosion (acetic acid and formic acid) on X65 carbon steel were investigated at starting pH values; 4.5, 5.3, or 6.3. The experiments were conducted in deaerated low-salinity aqueous solutions at atmospheric pressure and temperature of 65 °C. The corrosion rates were evaluated from linear polarization resistance data as well as mass loss and released iron concentration. A correlation between lower pH values and increased corrosion rates was found for the organic acid experiments. However, the pH was not the most critical factor for the rates of carbon steel corrosion in these experiments. The experimental results showed that the type of acid species involved and the concentration of the undissociated acid in the solution influenced the corrosion rates considerably.

scholarly journals Inhibition of carbon steel corrosion in media with H2S studied by impedance spectroscopy method

2008 ◽  
Vol 40 (3-4) ◽  
pp. 303-306 ◽  
Author(s):  
Liudmila E. Tsygankova ◽  
Vladimir I. Vigdorovich ◽  
Vladimir I. Kichigin ◽  
Ekaterina Kuznetsova
Keyword(s):  
Carbon Steel ◽  
Impedance Spectroscopy ◽  
Steel Corrosion ◽  
Spectroscopy Method

Sulfurous Acid Corrosion of Low Carbon Steel at Ordinary Temperatures - I. Its Nature

CORROSION ◽  
1966 ◽  
Vol 22 (5) ◽  
pp. 143-146 ◽  
Author(s):  
W. McLEOD ◽  
R. R. ROGERS
Keyword(s):  
Water Vapor ◽  
Carbon Steel ◽  
Sulfur Dioxide ◽  
Corrosion Rate ◽  
Acid Corrosion ◽  
Low Carbon Steel ◽  
Rate Data ◽  
Low Carbon ◽  
Sulfurous Acid ◽  
Ordinary Temperature

Abstract Corrosion rate data are presented for low carbon steel in (1) a combination of sulfur dioxide, water vapor and air, and (2) aqueous solutions of sulfurous acid in the absence of air, at ordinary temperature. Information as to the nature of the corrosion products is presented and it is shown that this depends on the place in which the corrosion takes place to an important extent.

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