Corrosion‐resistant and friction‐reducing performance of super‐hydrophobic coating on hot‐dip galvanised steel in a 3.5% NaCl solution

2021 ◽  
Author(s):  
Lei Cao ◽  
Yong Wan ◽  
Yang Li ◽  
Shuyan Yang
Keyword(s):  
Nacl Solution ◽  
Corrosion Resistant ◽  
Hydrophobic Coating ◽  
Galvanised Steel ◽  
Friction Reducing

scholarly journals Analysis of Corrosion Resistant Steel Coating Using Hot Dip Galvanization Method and Polarization / Tafel Test

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Faris Abdullah ◽  
Prantasi Harmi Tjahjanti
Keyword(s):  
Corrosion Test ◽  
Corrosion Resistant Steel ◽  
Resistant Steel ◽  
Galvanic Coating ◽  
Cast Aluminum ◽  
Nacl Solution ◽  
Corrosion Attack ◽  
Corrosion Resistant ◽  
Steel Coating ◽  
Polarization Test

Hot Dip Galvanization (HDG) is a method of plating steel by immersing liquid zinc. However, in this study, HDG was tried by dipping steel in a solution of cast aluminum waste, after being coated with galvanizing and graphene. Furthermore, the corrosion test is carried out using the tafel or polarization test aid. The aim of this research is to protect the corrosion attack on steel by means of HDG in a solution of cast aluminum waste, after being coated with galvanizing and graphene. The solution in the tafel test used NaCl solution. The results obtained were the least corrosion attacks on steel with a galvanic coating and graphene. Meanwhile, HDG with cast aluminum waste is not significant to protect corrosion on steel.

ZnO Nanoparticles for Anti-Corrosion Nanocoating of Carbon Steel

2017 ◽  
Vol 894 ◽  
pp. 76-80 ◽  
Author(s):  
J.N. Hasnidawani ◽  
Noor Azlina Hassan ◽  
Hassan Norita ◽  
Noorasikin Samat ◽  
Noor Najmi Bonnia ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Corrosion Behaviour ◽  
Oxide Coating ◽  
Immersion Test ◽  
Nacl Solution ◽  
Corrosion Resistant ◽  
Naoh Solution

Nanostructured coatings offer great potential for various applications due to their superior characteristics that are not typically found in conventional coatings. This research aimed at developing a new and improved coating that employs zinc oxide nanopowder as the agent to achieve corrosion resistant properties for a coating. The research project discusses on its corrosion behaviour of epoxy-zinc oxide in different media by measuring its corrosion rate. Mild carbon steel was used as the substrate for the epoxy-zinc oxide coating. The corrosion behavior mechanism of mild steel was investigated in different media, namely fresh water, NaCl solution, HCl solution and NaOH solution. Immersion test was conducted and studied for a period of 60 days, with daily and weekly weighing and immersing. The corrosion rate was calculated and mild steel corrodes in the different environment and degrades in the following trend; HCl → NaCl → NaOH → H2O.

Investigation of Corrosion Resistant of Al-Zn-Si-Re-Mg Coating

2013 ◽  
Vol 652-654 ◽  
pp. 1775-1779
Author(s):  
Dong Bo Wei ◽  
Jun Huang ◽  
Ping Ze Zhang ◽  
Zheng Jun Yao ◽  
Qiang Miao ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Passive Film ◽  
Polarization Curve ◽  
Steel Sheet ◽  
Indentation Test ◽  
Nacl Solution ◽  
Corrosion Resistant ◽  
Nano Indentation ◽  
Dipping Process

A dense hot-dipping Al-Zn-Si-Re-Mg coating was prepared on the surface of steel sheet. The microstructure and toughness of coating were investigated by SEM and Nano-indentation test. The polarization curve of coating was acquired in static 3.5 wt.% NaCl solution in air at 25°C. The results show that Re and Mg improve the corrosion resistance and toughness of Al-Zn-Si coating. The formation of passive film on surface of Al-Zn-Si-Re-Mg coating is easier than that of Al-Zn-Si coating. Re decreases the number of oxygen existed in the coating. Mg3Al2(SiO4)3 depresses the porosity of coating, which is a glassy compound and formed in hot-dipping process.

scholarly journals The Corrosion Behavior of Sputter-deposited W-Ti Alloys in 0.5 M NaCl Solution

1970 ◽  
Vol 10 ◽  
pp. 109-113 ◽  
Author(s):  
Jagadeesh Bhattarai
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Open Circuit ◽  
Nacl Solution ◽  
Corrosion Resistant ◽  
Corrosion Rates ◽  
Ti Alloys ◽  
Confocal Scanning ◽  
Confocal Scanning Laser ◽  
Sputter Deposited

The corrosion behavior of the sputter-deposited amorphous or nanocrystalline W-Ti alloys was studied in neutral 0.5 MNaCl solution at 25°C, open to air by immersion tests, electrochemical measurements and confocal scanning laser microscopic(CSLM) techniques. Titanium metal acts synergistically with tungsten in enhancing the corrosion resistance of the sputter-deposited W-Ti alloys so as to show higher corrosion resistance than those of alloy-constituting elements (that is, tungsten and titanium) in neutral 0.5 M NaCl solution. In particular, the amorphous W-Ti alloys containing 30-53 at% titanium showed lowest corrosion rates (that is, about 1 × 10-3 mm.y-1). Open circuit potentials of all the examined W-Ti alloys were shifted to more noble direction than those of the open circuit potentials of alloyconstituting elements in 0.5 M NaCl solution.Key words: Sputter deposition; W-Ti alloys; Corrosion-resistant; CSLM; NaCl solution.DOI: 10.3126/njst.v10i0.2899Nepal Journal of Science and Technology Volume 10, 2009 December Page:109-113 

scholarly journals PERILAKU KOROSI MATERIAL GELAS METALIK BERBASIS ZIRKONIUM UNTUK MATERIAL IMPLAN

2011 ◽  
Vol 15 (1) ◽  
pp. 234
Author(s):  
Djony Izak Rudyardjo
Keyword(s):  
Corrosion Rate ◽  
Metallic Glasses ◽  
Alloy Element ◽  
Corrosion Process ◽  
Nacl Solution ◽  
Corrosion Resistant ◽  
Corrosion Rates ◽  
Implant Material ◽  
Corrosion Reaction ◽  
Back Ground

PERILAKU KOROSI MATERIAL GELAS METALIK BERBASIS ZIRKONIUM UNTUK MATERIAL IMPLAN Djony Izak Rudyardjo1) 1)Departemen Fisika FST Universitas Airlangga, Kampus C Jl. Mulyorejo, Surabaya ABSTRAK Penelitian ini bertujuan untuk mempelajari perilaku korosi, pengaruh variasi komposisi paduan dan variasi konsentrasi larutan NaCl terhadap nilai laju korosi material gelas metalik yang berbasis zirkonium, dan untuk mengetahui potensi material gelas metalik berbasis zirkonium untuk material implan. Hasil uji XRD menunjukkan pola difraksi hanya merupakan cacah latar. Selanjutnya, laju korosi 0,36% NaCl pada variasi campuran elemen Zr67Cu33, Zr69.5Cu12Ni11Al7.5, Zr70Ni15Al15 dan   Zr67,6Cu11,8Ni10,8Al7,8Si2 berturut-turut adalah  17,7324 mpy; 13,5916 mpy; 7,1273 mpy da 5.8582 mpy.   Variasi campuran elemen mempengaruhi laju korosi dan Zr67,6Cu11,8Ni10,8Al7,8Si2 mempunyai daya  tahan korosi yang baik, karena adanya elemen Ni dan Si yang membuat reaksi korosi menjadi lambat. Hasil uji korosi pada sampel Zr69.5Cu12Ni11Al7.5 dengan variasi konsentrasi larutan NaCl 0,355%; 0,362%; 0,369% dan 0,376%   berturut-turut adalah 12,0732 mpy; 13,5916 mpy; 19,6227 mpy dan  28.1623 mpy.  Hasilnya menunjukkan laju korosi cenderung meningkat dengan peningkatan konsentrasi larutan NaCl. Dari penelitian ini dapat disimpulkan bahwa zirkonium berbasis gelas metalik mempunyai potensi untuk material implan. Hal ini sesuai dengan salah satu syarat untuk material implan, yaitu harus mempunyai daya tahan korosi yang tinggi, sehingga kinerjanya sebagai material implan tidak membahayakan tubuh. Kata kunci:  gelas metalik, korosi, material implan   THE BEHAVIOR OF ZIRCONIUM-BASED METALLIC GLASSES FOR IMPLANT MATERIALSABSTRACT The aim of this research was to study the corrosion behavior, the effects of composition and concentration variation of NaCl solution on corrosion rate of zirconium-based metallic glasses, and to ecaluate the potential of this glasses for implant material. The result of XRD test showed that the diffraction pattern was only the back ground.  Furthermore, corrosion rates of alloy elements Zr67Cu33, Zr69.5Cu12Ni11Al7.5, Zr70Ni15Al15 and Zr67,6Cu11,8Ni10,8Al7,8Si2 in 0,36% NaCl were 17,7324 mpy; 13,5916 mpy; 7,1273 mpy and 5.8582 mpy, respectively.  Variation of alloy element affected the corrosion rate.  Zr67,6Cu11,8Ni10,8Al7,8Si2 had the best corrosion resistant because of  the present of Ni and Si, so that the corrosion reaction occured slower. The corrosion rate of corrosion test on Zr69.5Cu12Ni11Al7.5 in 0,355, 0,362, 0,369 and 0,376% NaCl were  12,0732 mpy, 13,5916 mpy, 19,6227 mpy and 28’1623 mpy respectively.  The results indicated that increasing the concentration of  NaCl solution tended to increase the corrosion rate.  It could be concluded that zirconium-based metallic glasses has potential for implant material.  As this material  had the higest, it was suitable for implant material  and it did not andanger our body due to corrosion process. Keywords: metallic glasses, corrosion, implant materials

Corrosion resistant hydrophobic coating using modified conducting polyaniline

2017 ◽  
Vol 30 (2) ◽  
pp. 181-191 ◽  
Author(s):  
Arindam Adhikari ◽  
Rajshekhar Karpoormath ◽  
S Radha ◽  
Shammi Kumar Singh ◽  
R Mutthukannan ◽  
...  
Keyword(s):  
Mild Steel ◽  
Epoxy Resin ◽  
Corrosion Protection ◽  
Structural Damage ◽  
Open Circuit ◽  
Corrosion Resistant ◽  
Hydrophobic Coating ◽  
Protection Method ◽  
Conducting Polyaniline ◽  
Almost All

Almost all metals and their alloys are vulnerable to corrosion. To avoid structural damage and to avoid loss of its functionality, the most common protection method used is the application of a coating. In the present work, hydrophobic coatings using modified conducting polyaniline (PAni) were prepared and their corrosion-resistant properties were investigated. Modified PAni was prepared via two different techniques, conventional and rapid mixing method, in the presence of phenyl phosphonic acid (PPA) as dopant. The different PAni-PPA powders thus prepared were dispersed in an epoxy resin and coated on mild steel samples by drawing method. Tremendous improvement in hydrophobicity of the PAni-PPA (rapid)/epoxy was observed as compared to epoxy resin containing PAni-PPA (conventional method). The anticorrosion properties of these coatings on mild steel in 3 wt% NaCl were investigated using different electrochemical methods. Initial redox reactions and changes in conductivity of coating were reflected in the variations of open circuit potential (OCP). Both the coatings displayed stable high OCP, maintained their oxidative state, and provided corrosion protection for mild steel for more than 30 days. PAni-PPA (rapid)/epoxy gave better corrosion protection and showed higher ennoblement which may be due to the small particle size of PAni-PPA (rapid) leading to homogeneous mixing and better dispersion in the epoxy resin. Moreover, this coating is more hydrophobic in nature which is added advantage in case of corrosion-resistant coatings. The present investigation deals with preparation of highly (near super) hydrophobic coating containing conducting polymers for anticorrosion applications.

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