Steel tubes for onshore and offshore water pipelines. Internal liquid applied epoxy linings for corrosion protection

Considerable effort has been directed toward an improved understanding of the production of the strong and stiff ∼ 1-20 μm diameter pyrolytic carbon fibers of the type reported by Koyama and, more recently, by Tibbetts. These macroscopic fibers are produced when pyrolytic carbon filaments (∼ 0.1 μm or less in diameter) are thickened by deposition of carbon during thermal decomposition of hydrocarbon gases. Each such precursor filament normally lengthens in association with an attached catalyst particle. The subject of filamentous carbon formation and much of the work on characterization of the catalyst particles have been reviewed thoroughly by Baker and Harris. However, identification of the catalyst particles remains a problem of continuing interest. The purpose of this work was to characterize the microstructure of the pyrolytic carbon filaments and the catalyst particles formed inside stainless steel and plain carbon steel tubes. For the present study, natural gas (∼; 97 % methane) was passed through type 304 stainless steel and SAE 1020 plain carbon steel tubes at 1240°K.

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Analysis of the transistor converter of power together with energy dosage for the inductive heating and welding of steel tubes

European Transactions on Electrical Power ◽

10.1002/etep.4450140205 ◽

2004 ◽

Vol 14 (2) ◽

pp. 111-118 ◽

Cited By ~ 1

Author(s):

Miroslav S. Milicevic ◽

Valentina M. Milicevic

Keyword(s):

Inductive Heating ◽

Steel Tubes

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CVD mullite and mullite-alumina corrosion protection coatings for silicon based ceramics

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:20013107 ◽

2001 ◽

Vol 11 (PR3) ◽

pp. Pr3-861-Pr3-867 ◽

Cited By ~ 3

Author(s):

S. M. Zemskova ◽

J. A. Haynes ◽

K. M. Cooley

Keyword(s):

Corrosion Protection ◽

Silicon Based

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EIS study of the corrosion behavior of an organic coating applied on Algerian oil tanker

Metallurgical Research & Technology ◽

10.1051/metal/2020064 ◽

2020 ◽

Vol 117 (6) ◽

pp. 610

Author(s):

Nadia Hammouda ◽

Kamel Belmokre

Keyword(s):

Corrosion Protection ◽

Electrochemical Impedance ◽

Paint Film ◽

Organic Coating ◽

Diffusion Resistance ◽

Double Layer Capacitance ◽

Carbon Steel Surface ◽

Chloride Environment ◽

Oil Tanker ◽

Epoxy Paint

Organic coatings are widely employed in the corrosion protection of most metal surfaces, particularly steel. They provide a barrier against corrosive species present in the environment, due to their high resistance to oxygen, water and ions transport. This study focuses on the evaluation of corrosion protection performance of epoxy paint on the carbon steel surface in chloride environment (3% NaCl) by Electrochemical Impedance Spectroscopy (EIS). The electrochemical behavior of painted surface was estimated by EIS parameters that contained paint film resistance, paint film capacitance and double layer capacitance. On the basis of calculation using EIS spectrums it was observed that pore resistance (Rpore) decreased with the appearance of doubled layer capacitance (Cdl) due to the electrolyte penetration through the film. This was further confirmed by the decrease of diffusion resistance (Rd) which was also the indicator of the deterioration of paint film protectiveness. Microscopic analyses have shown that oxidation dominates the corroded surfaces.

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