Print ISSN: 1681-6900

Online ISSN: 2412-0758

About Journal

Engineering and Technology Journal is a global, scientific and Open Access journal. Publishing under the license of Creative Commons Attribution 4.0 International (CC-BY), this journal is published monthly by the University of Technology (UOT), Iraq, since 1977 (printed version) and since 2005 (online version). ETJ publishes original articles and review papers in the fields of engineering and science. The journal uses a double-blind peer-reviewing system to assure the quality of the publication. The Turnitin service is used to prevent plagiarism and to ensure the...
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Journal Information

Publisher: University of Technology-Iraq

Email:  etj@uotechnology.edu.iq

Editor-in-chief: Prof. Dr. Qusay F. Alsalhy

Print ISSN: 1681-6900

Online ISSN: 2412-0758

Volume 37 (2019)
3B
4C
12A
11A
10A
9A
8A
7A
6A
3C
2B
5A
2C
1C
1B
4A
3A
2A
1A
Volume 36 (2018)
2B
12A
11A
2C
10A
1C
9A
8A
7A
6A
5A
4A
3A
2A
1A
1B
Volume 31 (2013)
Issue 21
Issue 20
Issue 19
Issue 18
Issue 17
Issue 14
Issue 15
Issue 16
Issue 12
Issue 13
Issue 10
Issue 11
Issue 7
Issue 8
Issue 9
7-
Issue 6
Issue 5
Issue 6
Issue 4
Issue 4
Issue 5
Issue 2 B
Issue 2 A
Issue 3
Issue 3
Issue 1
Volume 28 (2010)
Issue 24
Issue 22
Issue 23
Issue 20
Issue 21
Issue 18
Issue 19
Issue 16
Issue 17
Issue 14
Issue 15
Issue 12
Issue 13
Issue 10
Issue 11
Issue 8
Issue 9
Issue 6
Issue 7
Issue 4
Issue 5
Issue 1
Issue 2
Issue 3

Volume 41, Issue 6 (Production and Metallurgy Engineering, Material Engineerin), June 2023


Nano-structured Thin Films for Hydrogen-Permeation Barrier Applied on AISI 1018 Steel Used in Petroleum Applications

Neam F. Mohammed; Bahaa S. Mahdi; Amin D. Thamir

Engineering and Technology Journal, 2023, Volume 41, Issue 6, Pages 1-12
DOI: 10.30684/etj.2022.134357.1268

Hydrogen embrittlement is a diffusible Hydrogen that is harmful to the toughness of iron. It follows, therefore, that the harmful influence of diffusible Hydrogen can be mitigated by preventing its entry into steel. This approach was achieved by usingthree coating layersas a coating nanostructure thin layer by DC sputtering on steel structural (AISI l018) and hydrogen charging (HC) effect on uncoated and different Nano coated tensile specimens. The first layer was Titanium as a bonding layer, the second layer was TiO2 with Al2O3, and the third layer was Al2O3. Using a titanium Nano layer coating on AISI1018 steel tensile specimens increased the tensile strength from 570 to 659 MPa with 16 hours of charging, which is considered a good increase. In contrast, the elongation remained in a steady-state with little difference in values compared to changing the charging time and the coating of the double layer. Furthermore, it was found that samples coated with TiO2 and Al2O3 by the DC method had advanced hydrogen embrittlement resistance and increased tensile strength (from 565 to 680 MPa with 8 hours of charging process). Moreover, the maximum adhesion value was related to the triple layer at 596 psi, and the lowest value was 309 psi using the titanium layer alone. The coating time was 5 hours of the sputtering process for all specimens. Thecoating layers are considered a good barrier for hydrogen permeation through steel structures (AISI 1018).

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