Microstructure of the enamel-steel interface: cross-sectional TEM and metallographic studies

Liu, Hang-Hsing; Shueh, Yinsheng; Yang, Feng-Shyang; Shen, Pouyan

doi:10.1016/0921-5093(92)90382-b

Cited by 21 publications

(5 citation statements)

References 20 publications

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“…Small pits were noted on the surfaces of all the enamel coatings. This is mainly ascribed to the formation and escape of H 2 , CO, CO 2 , and other gases from the steel plate and enamel during the final stages of the sintering process, wherein the pores did not close after the gases escape 22 . When the Ni content was ≤3 wt.%, the surface of the enamel remained relatively smooth and flat with a glassy luster.…”

Section: Resultsmentioning

confidence: 99%

Improving the mechanical properties of enamel by nickel nanoparticle addition

Xue

Xie

et al. 2022

Int J Applied Ceramic Tech

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In order to improve the mechanical properties of enamel and prolong its service life, the effects of nickel particles on the microscopic morphology and mechanical properties of enamel were studied by XRD, FTIR, DSC, SEM, porosity analyses, nanoindentation, and bending experiments, and the following conclusions were drawn. When the addition amount of Ni nanoparticles added to enamel ranges from 1 to 5 wt.%, the mechanical impact resistance of enamel is improved compared with no addition. With the addition of 1 wt.% Ni nanoparticles, it enhanced the toughness of the enamel and the maximum bending strength of the enamel was achieved, which was 10% higher than that of the samples without Ni nanoparticles. Therefore, the addition of the optimal Ni nanoparticle content of 1 wt.% significantly improved the performance of enameled pressure vessels.The findings in this work are valuable for extending the life of enamel-coated pressure vessels and thus reducing accidents caused by them.

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Section: Resultsmentioning

confidence: 99%

Improving the mechanical properties of enamel by nickel nanoparticle addition

Xue

Xie

et al. 2022

Int J Applied Ceramic Tech

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“…The phase angles in the high and middle frequency ranges were close to 90° during the entire immersion time and increased with the frequency in the low frequency range. In essence, a durable steel enamel interface transition zone was formed [15]. The island-like structure is iron-alloys, formed as a result of the chemical reactions of metal oxides in the enamel and the carbon and iron in the steel.…”

Section: Eismentioning

confidence: 99%

Corrosion Resistance of Pipeline Steel with Damaged Enamel Coating and Cathodic Protection

Fan

Reis²,

Chen

et al. 2018

Coatings

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This paper presents the first report on the corrosion resistance of pipeline steel with damaged enamel coating and cathodic protection in 3.5 wt % NaCl solution. In particular, dual cells are set up to separate the solution in contact with the damaged and intact enamel coating areas, to produce a local corrosion resistance measurement for the first time. Enamel-coated steel samples, with two levels of cathodic protection, are tested to investigate their impedance by electrochemical impedance spectroscopy (EIS) and their cathodic current demand by a potentiostatic test. Due to its glass transition temperature, the enamel-coated pipeline can be operated on at temperatures up to 400 • C. The electrochemical tests show that cathodic protection (CP) can decelerate the degradation process of intact coating and delay the electrochemical reactions at the enamel-steel interface. However, CP has little effect on the performance of coating once damaged and can prevent the exposed steel from corrosion around the damaged site, as verified by visual inspections. Scanning electron microscopy (SEM) indicated no delamination at the damaged enamel-steel interface due to their chemical bond.

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“…To protect pipelines, the most reliable and versatile are silicate-enamel coatings, characterized by a high degree of reliability to many chemical, mechanical and thermal influences [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Influence of Technological Regimes of High-Temperature Firing on the Structure and Properties of Silicate-Enamel Coatings for Carbon Steels

Ryabova¹,

Klimova²,

Golovko³

2021

SSP

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The silicate-enamel coating becomes the actual coating as a result of firing, which is a process of heating steel products coated with a “biscuit” dried slip layer, until completely melted, and a continuous coating is obtained on a metal substrate. With the constantly increasing requirements for the technical and operational properties of enameled products in the production of steel pipelines, it is advisable to use single-layer enameling, which saves raw materials and energy, due to the reduction in the number of layers and firing cycles of products. Its use for large-sized products, such as pipelines, eliminates their warping that occurs during repeated firing. In addition, the use of single-layer coatings makes it possible to obtain a better surface of products, since with a decrease in the resulting coating thickness it becomes more elastic and impact-resistant. All of the above is predetermined both by the structure of the glass coating itself and the generally formed steel - enamel composition. Therefore, knowledge of the structure, as well as of the physicochemical processes that occur during the firing of the enameled product, is necessary to solve technological issues successfully.

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Microstructure of the enamel-steel interface: cross-sectional TEM and metallographic studies

Cited by 21 publications

References 20 publications

Improving the mechanical properties of enamel by nickel nanoparticle addition

Improving the mechanical properties of enamel by nickel nanoparticle addition

Corrosion Resistance of Pipeline Steel with Damaged Enamel Coating and Cathodic Protection

Investigation of the Influence of Technological Regimes of High-Temperature Firing on the Structure and Properties of Silicate-Enamel Coatings for Carbon Steels

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