Effect of substrate temperature on microstructure and properties of nanocrystalline titania thin films prepared by pulsed laser deposition

Balakrishnan, G.; Manavalan, Shaktivel; Babu, R. Venkatesh; Song, Joon‐Tae

doi:10.17586/2220-8054-2016-7-4-621-623

Cited by 8 publications

(3 citation statements)

References 13 publications

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“…However, this material is highly affected by corrosion where environmental circumstances play an important role, especially in the external corrosion of the oil pipeline. Other factors influencing mild steel corrosion rate include the content of the petroleum product passing through it, moisture, temperature, pH, and soil type [7,8].…”

Section: Introductionmentioning

confidence: 99%

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

Mohammed¹,

Mahdi²,

Thamir³

2023

ETJ

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 A third coating layer gives an acceptable adhesion force with the highest deposition rate.  Nano-structured coating increased bulk AISI 1018 steel tensile strength after the hydrogen charging process.  Double layer of Ti and TiO2+Al2O3 coat gives a 20 percent increase in tensile strength after HC for AISI 1018 steel.  The layer of ceramic coatings TiO2withAl2O3 as coating Nano-structured thin films can improve the hydrogen permeation resistance  The Nano titanium layer showed the main portion in bondingHydrogen 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 using three coating layers as 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 M Pa 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 M Pa with 8 hours of charging process). M oreover, 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.The coating layers are considered a good barrier for hydrogen permeation through steel structures (AISI 1018).

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Section: Introductionmentioning

confidence: 99%

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

Mohammed¹,

Mahdi²,

Thamir³

2023

ETJ

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“…AISI1018 steel is highly affected by corrosion where environmental conditions play an important role, particularly within the exterior corrosion of oil pipelines. Also, other factors such as the content of the petroleum products that pass through it, moisture, temperatures, pH as well as soil types influence steel corrosion rate [1,[5][6]. Furthermore, corrosion affects mechanical properties, as it was found that the more acidic the soil is, the fewer the metal's tensile strength and fracture toughness will be [7].…”

Section: Introductionmentioning

confidence: 99%

Investigation Nano-coating for the Corrosion Protection of Petroleum storage tanks Steel

Ali¹,

Mahdi²,

Thamer³

2022

ETJ

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Using the BNi-2 alloy nano layer improves corrosion resistance.• Applying DC sputtering as a coating method. • Predicting generated phases for the nanocoating from EDX analysis on equilibrium phase diagrams.This work studies the protection from corrosion in the inner surface of petroleum storage tanks by applying nano-coating on the AISI1018 steel type used in these tanks. BNi-2 alloy, used as coating layer, was deposited using the DC sputtering technique to obtain protection layers of nano-coating. The cyclic potential dynamic polarization technique is used to study and evaluate the resistant metal to localize corrosion, for example, pitting and crevice corrosion. The samples were evaluated in a 3.5% NaCl aqueous solution using the polarization method to determine the corrosion rate. The input parameters of deposition included ion current 16 mA, vacuum 10 -1 mbar, time of deposition was 60 minutes, and the distance between target and substrate was 2.5 cm. The surface roughness of the uncoated specimens was (0.1466 µm), and after coating, it decreased to (0.0933µm). The most important factor that affects the corrosion of the coated steel surface is the surface topography of steel before coating, as it is known that the spattering process coats the facing surface to target better than the inclined surface topography. Therefore, some micro scratches non-coated well worked as nucleation for corrosion as detected in stereo microscope images for coated and uncoated surfaces. By calculating the corrosion rate from cyclic potential dynamic polarization for coated and uncoated workpieces, pitting and crevice corrosion improved approximately ten times compared to the uncoated AISI1018 steel surface.

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“…This material is highly affected by corrosion where environmental conditions play an important role especially in the external corrosion of the oil pipeline. Also, other factors such as content of the petroleum product passing through it, moist, temperature, pH and soil type affected Mild steel corrosion rate [1,5,6]. Nanotechnology is a promising technique for control and reduce corrosion rate especially in petroleum and gas industry [7].…”

Section: Introductionmentioning

confidence: 99%

Investigation Nano coating for Corrosion Protection of Petroleum Pipeline Steel Type A106 Grade B; Theoretical and Practical Study in Iraqi Petroleum Sector

Kadhim¹,

Sukkar²,

Abbas³

et al. 2017

ETJ

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In the present investigation, titania (TiO 2 ) nano-thin films were deposited on steel type A106-B, by using the Pulse Laser Deposition (PLD) technique to obtain passive layers of nano-coating. Electrochemical methods (Tafel completion) are used for study corrosion behavior of steel coating. The A106-B specimens were evaluated in 3.5 wt. % NaCl aqueous solution by using polarization technique with pH adjustment to 4.0 in order to determine the corrosion rate. The samples of TiO 2 thin films were characterized by SEM, AFM, XRD, and FTIR. The input parameters were substrate temperature (100, 200 and 300) ' 0 C', number of pulse (300, 400 and 500) and fluencies energy (800, 900 and 1000) mJ/cm 2 , have been investigated to detect their impact on corrosion reduction rate using Taguchi methodology orthogonal array and Analysis of Variance (ANOVA).The ANOVA results indicates that number of shoots pulse significantly affecting the corrosion rate in PLD technique, which is highest among the contributions of the other parameters which is (58.03%) about three times of the fluencies energy (19.12%).The results show that the TiO 2 deposition on steels offers an excellent corrosion resistance about 99 times as compared with uncoated steel. The optimum conditions to minimum values corrosion rate are: temperature of 300ºC, number of laser pulses at 300, and fluencies energy equal to 1000 mJ/cm 2 . Finally the optimal parameters that was used to predict the conclusions were (98.6) to the response of corrosion rate.

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Effect of substrate temperature on microstructure and properties of nanocrystalline titania thin films prepared by pulsed laser deposition

Cited by 8 publications

References 13 publications

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

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

Investigation Nano-coating for the Corrosion Protection of Petroleum storage tanks Steel

Investigation Nano coating for Corrosion Protection of Petroleum Pipeline Steel Type A106 Grade B; Theoretical and Practical Study in Iraqi Petroleum Sector

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