Influence of Additional Alloying Elements on Corrosion Resistance of Hot Dip Galvanised Steels

2012 ◽  
Vol 730-732 ◽  
pp. 811-816 ◽  
Author(s):  
Alexandru Alexa ◽  
Tamara Radu ◽  
Florentina Potecasu ◽  
Anisoara Ciocan
Keyword(s):  
Corrosion Resistance ◽  
Diffusion Process ◽  
Dip Coating ◽  
Alloying Elements ◽  
Coating Process ◽  
Accelerated Corrosion ◽  
Protective Layers ◽  
Galvanized Steels ◽  
Simulated Environment ◽  
Improved Performance

The alloying of the zinc with some additional elements in specific quantities could be reliably used in the hot-dip coating process. These elements form specific intermetallic compounds that conferred substantially improved performance to the end-product specially by improving of the corrosion resistance. The paper presents the research that has developed to analyze the influence of aluminum, bismuth and tin like alloying elements added in the zinc on corrosion resistance of galvanized steels. Steel samples were galvanized by the hot-dip method in micro-alloyed zinc baths. The influence of the alloying elements on the formation of the different phases and on the diffusion process is discussed. The corrosion experiments were carried out in a simulated environment of accelerated corrosion conditions. The kinetics and the mechanism of corrosion of the samples were studied in correlation with the effect of alloying elements on nature and characteristics of protective layers.

Preparation and Corrosion of Mullite Thin Film on ß-SiAlON Ceramics

2008 ◽  
Vol 403 ◽  
pp. 135-138 ◽  
Author(s):  
Yasunobu Noritake ◽  
Hajime Kiyono ◽  
Shiro Shimada
Keyword(s):  
Thin Film ◽  
Corrosion Resistance ◽  
Dip Coating ◽  
Coated Sample ◽  
Coating Process ◽  
Al2o3 Film ◽  
High Temperature Water ◽  
Water Vapor Corrosion ◽  
Al2o3 Films ◽  
Temperature Water

Mullite film was formed on ß-SiAlON (Si6-zAlzOzN8-z, z = 3) ceramics by reaction of Al2O3 films with silica formed on oxidation to improve a high temperature water vapor corrosion resistance. Sintered ß-SiAlON was fabricated by hot pressing of ß-sialon (z = 3) powder without additive at 1900°C and at 24 MPa for 4 h in N2. The Al2O3 film was deposited on polished ß-SiAlON ceramics by a dip coating process of Al2O3 precursor sols prepared from the alkoxide solution and aluminum sol. The Al2O3 coated sample was heated in Ar/O2 (95/5 vol.%) at 1300°C for 2 h, resulting in the formation of mullite by reaction with silica produced from sialon. The resulting mullite-coated sample was corroded in H2O/Ar/O2 (90/8/2 vol.%) at 1200°C for 2 ~ 100 h. The corroded samples were characterized by XRD and SEM-EDS for the evaluation of the corrosion resistance of mullite-coated sialon.

The Behavior of Galvanized Steel Coated with a Double and Triple Layer of Hybrid Films

2012 ◽  
Vol 727-728 ◽  
pp. 1604-1609
Author(s):  
Sandra Raquel Kunst ◽  
Rogério Freitas dos Santos ◽  
Cláudia Trindade Oliveira ◽  
Elen Leal da Silva ◽  
Iduvirges Lourdes Müller ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Protection ◽  
Morphological Analysis ◽  
Hybrid Film ◽  
Dip Coating ◽  
Galvanized Steel ◽  
Coating Process ◽  
Barrier Effect ◽  
Hybrid Films ◽  
Triple Layer

The aim of this work is to characterize by electrochemical, physicochemical and morphological analysis the hybrid films applied on galvanized steel by dip-coating process. Preliminaries studies showed that a monolayer of silane is not enough to increase the corrosion resistance protection of the substrate. In this context, the galvanized steel was coated with a double and triple layer of hybrid film obtained from a sol constituted by silane precursors 3 - (trimetoxisililpropil) methacrylate (TMSPMA) and tetraethoxysilane (TEOS) with addition of cerium nitrate at a concentration of 0.01M. The hybrid films were cured for 20 minutes at 60°C in each application of the film. The results showed that a double and triple layer of hybrid film increase the barrier effect contributing to corrosion protection of galvanized steel.

Effect of Alloying Elements on Corrosion Resistance of High Alloy Steel in Simulated Environment of Waste Incinerator

1997 ◽  
Vol 46 (1) ◽  
pp. 24-29
Author(s):  
Tsuyoshi Masugata ◽  
Masao Sato ◽  
Kazuo Fujiwara ◽  
Haruo Tomari ◽  
Satoshi Yamashita
Keyword(s):  
Corrosion Resistance ◽  
Alloy Steel ◽  
Alloying Elements ◽  
Waste Incinerator ◽  
High Alloy ◽  
High Alloy Steel ◽  
Simulated Environment ◽  
Effect Of Alloying

scholarly journals Investigation of the Oxidation Mechanism of Dopamine Functionalization in an AZ31 Magnesium Alloy for Biomedical Applications

Coatings ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 584 ◽  
Author(s):  
Arezoo Ghanbari ◽  
Fernando Warchomicka ◽  
Christof Sommitsch ◽  
Ali Zamanian
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Deposition Rate ◽  
Mechanical Stability ◽  
Healing Process ◽  
Oxidation Mechanism ◽  
Dip Coating ◽  
Electrochemical Analysis ◽  
Implant Design ◽  
Coating Process

Implant design and functionalization are under significant investigation for their ability to enhance bone-implant grafting and, thus, to provide mechanical stability for the device during the healing process. In this area, biomimetic functionalizing polymers like dopamine have been proven to be able to improve the biocompatibility of the material. In this work, the dip coating of dopamine on the surface of the magnesium alloy AZ31 is investigated to determine the effects of oxygen on the functionalization of the material. Two different conditions are applied during the dip coating process: (1) The absence of oxygen in the solution and (2) continuous oxygenation of the solution. Energy dispersive spectroscopy (EDS) and Fourier transform infrared spectroscopy (FTIR) are used to analyze the composition of the formed layers, and the deposition rate on the substrate is determined by molecular dynamic simulation. Electrochemical analysis and cell cultivation are performed to determine the corrosion resistance and cell’s behavior, respectively. The high oxygen concentration in the dopamine solution promotes a homogeneous and smooth coating with a drastic increase of the deposition rate. Also, the addition of oxygen into the dip coating process increases the corrosion resistance of the material.

ALCOTEC WELD FILLER WIRE 5356

Alloy Digest ◽  
2016 ◽  
Vol 65 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Alloying Elements ◽  
Filler Wire ◽  
Welding Wire

Abstract Alcotec weld filler wire 5356 is a non-heat-treatable aluminum welding wire whose principal alloying elements are magnesium, manganese, and chromium. It is similar to the European wire AlMg5Cr(A). This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on corrosion resistance as well as forming and joining. Filing Code: Al-445. Producer or source: AlcoTec Wire Corporation.

ALLEGHENY LUDLUM AL-6XN PLUS

Alloy Digest ◽  
2005 ◽  
Vol 54 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Alloying Elements ◽  
Temperature Performance

Abstract The AL-6XN PLUS alloy is an enhanced version of the AL-6XN alloy (see Alloy Digest SS-494, May 1988). Both satisfy the composition requirements of UNS N08367, but AL-6XN PLUS contains a greater concentration of the alloying elements (Cr, Mo, and N) which promote corrosion resistance. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as heat treating and joining. Filing Code: SS-923. Producer or source: Allegheny Ludlum Corporation. Originally published April 2005, revised June 2005.

DMV 928

Alloy Digest ◽  
2009 ◽  
Vol 58 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Base Alloy ◽  
Heat Treating ◽  
Alloying Elements ◽  
Nickel Base Alloy ◽  
Excellent Corrosion Resistance ◽  
Nickel Base

Abstract DMV 928 is a nickel-base alloy with high alloying elements of chromium, molybdenum, and copper for excellent corrosion resistance in reducing and oxidizing media. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-1048. Producer or source: Mannesmann DMV Stainless USA Inc.

Electrochemical characterization of YSZ thick films deposited by dip-coating process

2007 ◽  
Vol 171 (2) ◽  
pp. 783-788 ◽  
Author(s):  
F. Mauvy ◽  
P. Lenormand ◽  
C. Lalanne ◽  
F. Ansart ◽  
J.M. Bassat ◽  
...  
Keyword(s):  
Thick Films ◽  
Dip Coating ◽  
Electrochemical Characterization ◽  
Coating Process

A Novel Duplex Re-NiW Based Diffusion Barrier on a Nickel-Base Superalloy for TBC Systems

2008 ◽  
Vol 595-598 ◽  
pp. 127-134 ◽  
Author(s):  
Sebastien Mercier ◽  
Denis Boivin ◽  
Marie Pierre Bacos ◽  
Pierre Josso
Keyword(s):  
Diffusion Barrier ◽  
Bond Coat ◽  
Alloying Elements ◽  
Nickel Base Superalloy ◽  
Coating Process ◽  
Thermal Treatments ◽  
Eds Analysis ◽  
Nickel Base ◽  
Tbc Systems ◽  
Base Superalloy

A diffusion barrier between a 4th generation superalloy (MC-NG) and a β-(Ni, Pt)Al has been studied. The used coating process combines Re and NiW electrolytic deposits followed by thermal treatments. The diffusion barrier is composed of a continuous 3 &m thick ReWNi layer under a 10 &m thick β-(Ni, Pt)Al containing W rich precipitates. EDS analysis on as coated samples and on 50h-1100°C-Ar aged samples showed that the Re-NiW layer works as a diffusion barrier. The Al reservoir in the bond coat after aging is higher with the diffusion barrier than without. The concentrations of alloying elements are also lower in the bond coat with the diffusion barrier than without.

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