Spray coated superamphiphobic surface with hot water repellency and durable corrosion resistance

2020 ◽  
Vol 596 ◽  
pp. 124750 ◽  
Author(s):  
Binbin Zhang ◽  
Weichen Xu ◽  
Dahai Xia ◽  
Yanliang Huang ◽  
Xia Zhao ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Water Repellency ◽  
Hot Water

The Corrosion Resistance of Hard Anodised EN AW 7075 T6 Alloy

2021 ◽  
Vol 105 (1) ◽  
pp. 329-337
Author(s):  
David Kusmič ◽  
Lenka Klakurková ◽  
Martin Julis ◽  
Pavel Gejdoš ◽  
Jindrich Vilis ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Bulk Material ◽  
Surface Hardness ◽  
Hot Water ◽  
Initial Surface ◽  
Corrosion Properties ◽  
Resistance Surface ◽  
Hard Anodizing ◽  
Deaerated Solution ◽  
7075 Alloy

In this paper, commercially cold-rolled and artificial aged EN AW 7075 T6 alloy has been used. To ensure increased corrosion resistance, surface hardness, scratching resistance, and aesthetic features, this aluminium alloy was subsequently hard anodised and hot-water sealed (AC-A). The hard anodizing and sealing process increased surface hardness up to 304±13 HV 1 from an initial surface hardness of 194±3 HV 1. Also, the microhardness of the anodised layer and bulk material has been documented. Scanning electron microscopy (SEM) was used for microstructure and trapped precipitates investigation in the 42.9±1.4 thick formed anodised layer investigation. The T6 treated (AC) and hard anodised together with sealed (AC-A) EN AW 7075 alloy corrosion properties were evaluated using the anodic potentiodynamic polarisation tests (PPT) in a neutral 2.5% NaCl deaerated solution. The corrosion rate CR (mm/y) decreased approx. 39-times for the hard anodised and sealed EN AW 7075 alloy (AC-A), associated with the shift of the Ecorr (mV) to more positive values, degreased Icorr (µA) and increased Rp (Ohm) values compared to the artificial aged (AC) alloy. Additionally, the pitting was evaluated using laser confocal microscopy, and the pitting coefficient was also calculated.

scholarly journals Facile Fabrication of Magnetic, Durable and Superhydrophobic Cotton for Efficient Oil/Water Separation

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 442 ◽  
Author(s):  
Mingguang Yu ◽  
Qing Wang ◽  
Wenxin Yang ◽  
Yonghang Xu ◽  
Min Zhang ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Water Repellency ◽  
Cotton Fabrics ◽  
Ammonia Solution ◽  
Hot Water ◽  
Water Contact ◽  
Water Separation ◽  
Efficient Strategy ◽  
Oil Water Separation ◽  
Oil Water

In this paper, we present a facile and efficient strategy for the fabrication of magnetic, durable, and superhydrophobic cotton for oil/water separation. The superhydrophobic cotton functionalized with Fe3O4 magnetic nanoparticles was prepared via the in situ coprecipitation of Fe2+/Fe3+ ions under ammonia solution on cotton fabrics using polyvinylpyrrolidone (PVP) as a coupling agent and hydrophobic treatment with tridecafluorooctyl triethoxysilane (FAS) in sequence. The as-prepared cotton demonstrated excellent superhydrophobicity with a water contact angle of 155.6° ± 1.2° and good magnetic responsiveness. Under the control of the external magnetic field, the cotton fabrics could be easily controlled to absorb the oil from water as oil absorbents, showing high oil/water separation efficiency, even in hot water. Moreover, the cotton demonstrated remarkable mechanical durable properties, being strongly friction-resistant against sandpaper and finger wipe, while maintaining its water repellency. This study developed a novel and efficient strategy for the construction of magnetic, durable, and superhydrophobic biomass-based adsorbent for oil/water separation, which can be easily scaled up for practical oil absorption.

scholarly journals Corrosion Resistance Evaluation of Stainless Steel Flexible Pipe with Copper Alloy Joint in Hot Water Environment

2016 ◽  
Vol 65 (6) ◽  
pp. 250-254
Author(s):  
Takeshi Daikuhara ◽  
Shigeru Komukai ◽  
Mitsunori Komori ◽  
Naoto Nakazato
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Copper Alloy ◽  
Water Environment ◽  
Hot Water ◽  
Flexible Pipe ◽  
Resistance Evaluation

scholarly journals Study on a Superhydrophobic Stainless Steel (SUS 304) Surface to Enhance Corrosion Resistance

2021 ◽  
Vol 59 (4) ◽  
pp. 217-222
Author(s):  
Youngju Park ◽  
Chanyoung Jeong
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Nuclear Power ◽  
Water Repellency ◽  
Industrial Applications ◽  
Surface Shape ◽  
Water Repellent ◽  
Anode Electrode ◽  
Corrosion Behaviors ◽  
Electronic Parts

Stainless steel is a metal with excellent workability, economy, and corrosion resistance, so it is used in various industrial applications including the marine, machinery, electronic parts, piping, power generation, and nuclear power fields. However, in contaminated environments such as marine and gas pipelines, stainless steel has problems, including surface aging and corrosion. Several surface treatment methods have been proposed to address those problems. This study was conducted to observe the water repellency and corrosion resistance of a superhydrophobic phosphorylated film on the surface of stainless steel. The anodization was carried out using a step-by-step process under voltage in an ethylene glycol electrolyte, at 30, 50, and 70 V for 3 hours, respectively. The distance between the anode electrode and cathode electrode was maintained at 5 cm. A water-repellent surface was achieved using a FDTS (1H, 1H, 2H, 2H-Perfluorodecyltrichlorosilane) solution, a material with low energy, on the surface of the fabricated specimen. A Field Emission Scanning Electron Microscope (FE-SEM) was used to analyze the surface shape of the structure, and water repellency was analyzed using an angle meter. The corrosion behaviors of the electrochemical oxide film were investigated through polarization experiments.

REMANIT 4510

Alloy Digest ◽  
1995 ◽  
Vol 44 (12) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Hot Water ◽  
Temperature Performance ◽  
Washing Machines

Abstract REMANIT 4510 is a ductile non-hardenable type of stainless steel recommended for parts requiring a combination of good formability, weldability and corrosion resistance. This composition is a modification of Type 430 with an addition of titanium. This addition helps in corrosion resistance making the alloy useful in washing machines and hot water boilers. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, and joining. Filing Code: SS-628. Producer or source: Thyssen Stahl AG.

Investigation on Properties of Anodized 7075 Slurry Cast Aluminum after Sealing

2018 ◽  
Vol 936 ◽  
pp. 187-191
Author(s):  
Apichaya Khunphet ◽  
Somjai Janudom ◽  
Narissara Mahathaninwong
Keyword(s):  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Oxide Film ◽  
Acid Solution ◽  
Potassium Dichromate ◽  
Hot Water ◽  
Cast Aluminum ◽  
Porous Oxide ◽  
Nickel Fluoride ◽  
Al Oxide

This work investigated the effects of sealing agents on properties of 7075 slurry cast substrate anodized in 1M sulfuric acid solution. The sealing agents tested were hot water, potassium dichromate, teflon, and nickel fluoride. It was found that anodized 7075 slurry cast Al oxide film sealed with teflon gave the highest hardness and the best corrosion resistance. It is possible that the porous oxide film was plugged by teflon, reducing porosity more than hot water, potassium dichromate, or nickel fluoride sealing.

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