Measuring stresses in welded joints by the remagnetisation loss method

Ибрагимов, И. Г.; Вильданов, Р Г

doi:10.1533/wint.2007.3770

Cited by 14 publications

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“…Various contaminants (HCl, H 2 O, dust, lime) in the combustion atmosphere, reduce the temperature of the development of local sulphide corrosion, and if the surface is rough (availability of weld spatters and other mechanical surface defects), pitting develops on these areas [9,10]. The strongest impact of sulfur-containing compounds is observed on on steels and alloys with nickel content more than 30%, but in certain conditions local corrosion is observed on steels even with lower content of nickel (in cases when service temperature is close to the limit of the heatresistance).…”

Section: The Results Of Studies and Their Discussionmentioning

confidence: 99%

Heat Resistance of Certain Structural Steels

Tyusenkov

Рубцов

Tlyasheva

2017

SSP

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Heat-resistance (scale resistance) is the steel corrosion fastness in dry gas at high temperatures. At the temperatures over 570 °С, the ferrous alloys oxidize, as ferric oxide (wustite) with simple cubic lattice appears on the metal surface. Such oxide lacks oxygen atoms (omission solid solution) and does not interfere with the diffusion between metal and oxygen. As a result of this process the brittle oxide-scale develops and the loss of metal increases. In order to increase the heat-resistance of steel, different alloying elements are included into its composition, forming oxides with the tight structure of crystal lattice. In this paper we’ve investigated the heat-resistance of some structural steels and analyzed their corrosion resistance in the high temperature aggressive environments of chemical productions.

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Section: The Results Of Studies and Their Discussionmentioning

confidence: 99%

Heat Resistance of Certain Structural Steels

Tyusenkov

Рубцов

Tlyasheva

2017

SSP

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“…The Bauman method was applied to find the reasons for the hydrogen stratification of metal. According to this method, the distributions of sulphide inclusions were detected in presence of etchant [5 ml H 2 S0 4 ; 100 ml Н 2 0] and the equipment presented at the Department of "Technology of Petroleum Apparatus Engineering" of the Ufa State Petroleum Technological University [11][12][13][14].…”

Section: Experiments Techniques and Materialsmentioning

confidence: 99%

Investigation of the Hydrogen Stratification of the Metal of the Active Gas Pipeline

Nasibullina

Гареев

Rizvanov

2018

SSP

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One of the most common types of metal destruction in the oil and gas industry is hydrogen embrittlement. Hydrogen corrosion is a complex of negative effects of hydrogen on steel, leading to the destruction of metal structures. Hydrogen passes through a defect-free metal, without lingering in it. In the presence of defects, hydrogen is retained in the metal forming a brittle solid solution, metal stratification along the segregation streamer, blistering. Studies of the metal of a gas pipeline made of steel 09G2S are presented in the article. The sample was selected from the local zone of destruction in the condensate collector, the metal of the pipe had typical for hydrogen corrosion stratifications. The scope of the study was identification of the most dangerous part of hydrogen corrosion on the sample taken from the local zone of destruction. Studies on the chemical composition and mechanical properties of 09G2S steel were also carried out. Stress-related characteristics of the metal microstructure of the failed gas pipeline were obtained and the character of the destruction progress was revealed. The presence of sulfides cluster in the metal of studied pipe was determined applying metallographic method for determining nonmetallic inclusions.

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“…A gravimetric method the principle of which is to determine the loss of metal samples mass during their presence in the test medium to determine the corrosion rate was applied. The corrosion rate is characterized by a mass index K m (g / m 2 •h) in a gravimetric method [10][11][12][13][14][15].…”

Section: Experiments Techniques and Materialsmentioning

confidence: 99%

Gas Corrosion of Pyrolysis Furnace Coils

Mirkhaydarova

Tyusenkov

Rizvanov

2018

SSP

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The dependence of the rate of gas corrosion of high-alloy steels on temperature is investigated in this article. High corrosion resistance of steels is achieved by introducing into their composition of elements that form thin and strong oxide films on its surface. The most effective alloying elements are chromium, aluminum and nickel. Steel, containing these elements, becomes resistant to gas corrosion at high temperatures. Steels, containing less chromium, are susceptible to gas corrosion to the same extent as carbon steels. The steel 310 S and 316 Ti were tested for heat-resistance. Samples of steel 310 S were cut from a new pipe and from the coil of pyrolysis furnace, which was used for 6800 hours. Tests were carried out at 500 ... 1000 °С. It is established that steel 310 S is more heat-resistant than steel 316 Ti. It is shown that the heat-resistance of steel 310 S decreases after operation in the pyrolysis furnace and has lower values than values of the new steel.

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Measuring stresses in welded joints by the remagnetisation loss method

Cited by 14 publications

References 0 publications

Heat Resistance of Certain Structural Steels

Heat Resistance of Certain Structural Steels

Investigation of the Hydrogen Stratification of the Metal of the Active Gas Pipeline

Gas Corrosion of Pyrolysis Furnace Coils

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