Microfluidic water flow on laser-patterned MicroCoat® - coated steel surface

2021 ◽  
pp. 152258
Author(s):  
I V Krylach ◽  
M I Fokina ◽  
S I Kudryashov ◽  
A V Veniaminov ◽  
RO Olekhnovich ◽  
...  
Keyword(s):  
Water Flow ◽  
Steel Surface ◽  
Coated Steel

Directional autonomous water flow in laser-engineered microfluidic gradient structures on polymethylmetacrylate-coated steel surface

2020 ◽  
Vol 17 (8) ◽  
pp. 085602
Author(s):  
I V Krylach ◽  
S I Kudryashov ◽  
M I Fokina ◽  
V E Sitnikova ◽  
R O Olekhnovich ◽  
...  
Keyword(s):  
Water Flow ◽  
Steel Surface ◽  
Coated Steel

Wear Behaviour of TiC Coated AISI 4340 Steel Produced by TIG Surface Melting

2015 ◽  
Vol 819 ◽  
pp. 76-80 ◽  
Author(s):  
Md Abdul Maleque ◽  
Belal Ahmed Ghazal ◽  
Mohammad Yeakub Ali ◽  
Maan Hayyan ◽  
Abu Saleh Ahmed
Keyword(s):  
Plastic Deformation ◽  
Wear Resistance ◽  
Steel Surface ◽  
Composite Layer ◽  
Wear Behaviour ◽  
Wear Volume ◽  
Coated Steel ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Aisi 4340

Coating possesses superior wear resistance which makes the material suitable for components subjected to dynamic applications under sever wearing condition and high temperature applications. In this study, TiC coating layer was synthesized by preplacing a 1 mg/mm2of fine size (~40 μm) TiC powder on the surface of AISI 4340 steel. The composite layer was produced by rapidly melting TiC powder together with the substrate steel using tungsten inert gas (TIG) torch welding at a fixed heat input of 1344 J/mm. The wear behaviour of the coated steel was investigated using a universal pin-on-disc tribometer. The microhardness profile of the coating showed increment of the hardness value (almost 5 times higher) than the substrate material. The wear test results showed that the TiC coated steel has lower wear volume loss hence, higher wear resistance compared to the substrate AISI 4340 steel. Incorporation of TiC into the steel surface has improved the wear behaviour of the steel by reduction of plastic deformation and ploughing of the steel surface. The SEM micrograph of the wear worn surface showed mild type of abrasive wear for coated steel whereas, the AISI 4340 steel showed severe type wear with excessive plastic deformation and ploughing.

Development of polyurethane-based superhydrophobic coatings on steel surfaces

2020 ◽  
Vol 378 (2167) ◽  
pp. 20190446 ◽  
Author(s):  
Mukesh Kumar Meena ◽  
Balraj Krishnan Tudu ◽  
Aditya Kumar ◽  
Bharat Bhushan
Keyword(s):  
Contact Angle ◽  
Steel Surface ◽  
Mechanical Stability ◽  
Industrial Applications ◽  
Angle Measurement ◽  
Coated Steel ◽  
Corrosion Properties ◽  
Static Contact ◽  
Steel Surfaces ◽  
Self Cleaning

In this study, a superhydrophobic coating on steel surface has been developed with polyurethane, SiO 2 nanoparticles and hexadecyltrimethoxysilane by using a spin-coating technique. Characterization of the coated steel surface was done by using the contact angle measurement technique, scanning electron microscopy and Fourier transform infrared spectroscopy. With a water tilt angle of 4° ± 2° and static contact angle of 165° ± 5°, the coated surface shows a superhydrophobic and self-cleaning nature. Chemical, thermal, mechanical stability tests and droplet dynamic studies were done to evaluate performance of the coating. Excellent self-cleaning, anti-fogging and anti-corrosion properties of coated steel surfaces make them ideal for industrial applications. This article is part of the theme issue ‘Bioinspired materials and surfaces for green science and technology (part 3)’.

The effects of immersion time on morphology and electrochemical properties of the Cr(III)-based conversion coatings on zinc coated steel surface

2008 ◽  
Vol 50 (12) ◽  
pp. 3494-3499 ◽  
Author(s):  
Yu-Tsern Chang ◽  
Niann-Tsyr Wen ◽  
We-Kun Chen ◽  
Ming-Der Ger ◽  
Guan-Tin Pan ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Immersion Time ◽  
Steel Surface ◽  
Coated Steel ◽  
Conversion Coatings ◽  
Zinc Coated Steel

scholarly journals Experimental and Numerical Investigation of an Overheated Aluminum Droplet Wetting a Zinc-Coated Steel Surface

Metals ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 535 ◽  
Author(s):  
Marius Gatzen ◽  
Peer Woizeschke ◽  
Tim Radel ◽  
Claus Thomy ◽  
Frank Vollertsen
Keyword(s):  
Numerical Investigation ◽  
Steel Surface ◽  
Coated Steel ◽  
Zinc Coated Steel

scholarly journals Behavior of Tin Electro-deposition and Spontaneous Tin Alloy Formation on Nickel Flash-coated Steel Surface

1986 ◽  
Vol 72 (8) ◽  
pp. 1173-1180 ◽  
Author(s):  
Takao SAITO ◽  
Kazuya EZURE ◽  
Tomohiko HAYASHI ◽  
Shigeo SAKATA
Keyword(s):  
Steel Surface ◽  
Alloy Formation ◽  
Coated Steel ◽  
Electro Deposition

Protection of hot subsea risers by using thermally sprayed aluminium

2017 ◽  
Vol 64 (3) ◽  
pp. 299-305 ◽  
Author(s):  
Nataly Araujo Ce ◽  
Shiladitya Paul
Keyword(s):  
Carbon Steel ◽  
Steel Surface ◽  
Offshore Structures ◽  
Pure Aluminium ◽  
Coated Steel ◽  
Mechanism Of Formation ◽  
Content Type ◽  
Synthetic Seawater ◽  
X Ray ◽  
Thermally Sprayed

Purpose In spite of the high interest in thermally sprayed aluminium (TSA) to protect offshore structures, pipelines, risers, etc., data correlating the exposure of TSA-coated steel in hot seawater to its performance are lacking. No information is available on the performance of TSA in hot seawater, especially when damaged. This paper aims to address this knowledge gap and report the corrosion performance of damaged TSA on carbon steel exposed to boiling synthetic seawater for different periods (up to 5,000 h). It also attempts to understand the mechanism of formation of calcareous deposits in boiling synthetic seawater by using various characterisation tools. Design/methodology/approach Twin wire arc spray was used to coat carbon steel specimens with commercially pure aluminium. Holiday was drilled on the coated surface to expose the underlying steel, amounting to 4 per cent of the specimen surface area. These specimens were then exposed to boiling synthetic seawater for different periods: 2, 68, 188, 335 and 5,000 h. During exposure, the potential was monitored (vs standard calomel electrode [SCE]) and linear polarisation resistance (LPR) method was used to calculate the corrosion rate (CR). After exposure, these specimens were analysed by using characterisation tools such as X-ray diffraction (XRD) and scanning electron microscope (SEM)/energy-dispersive X-ray spectroscopy (EDX). Findings The TSA-coated steel samples with 4 per cent holiday showed a CR of approximately 0.008-0.015 mm y−1 and a stable potential (Ecorr) around −800 mV (SCE), when exposed to boiling synthetic seawater for approximately 5,000 h. Microstructural characterisation established that the deposits comprised brucite [Mg(OH)2] only (this is very different to what has been reported at ambient temperatures). The stable potentials obtained after 5,000 h suggest that the brucite layers provided effective corrosion mitigation. Thus, TSA seems to show the potential to protection hot carbon steel risers, even when damage exposing the external steel surface to the seawater is present. Originality/value The mechanism of calcareous deposit formation has been studied for many years, but most of the previously reported studies concentrate on low or ambient temperature behaviour. The reported studies mainly concentrate on the application of cathodic protection, rather than the effect of TSA. This is the first journal paper where the behaviour of damaged TSA in boiling synthetic seawater has been reported. The formation of brucite-only layer in the damaged area adjacent to the steel surface in boiling synthetic seawater is novel. And the mechanism of formation of this layer has been explained in the paper.

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